Journal articles: 'Nanorose'

1

Mousavinia, S. E., S. Hajati, M. Ghaedi, and K. Dashtian. "Novel nanorose-like Ce(iii)-doped and undoped Cu(ii)–biphenyl-4,4-dicarboxylic acid (Cu(ii)–BPDCA) MOSs as visible light photocatalysts: synthesis, characterization, photodegradation of toxic dyes and optimization." Physical Chemistry Chemical Physics 18, no. 16 (2016): 11278–87. http://dx.doi.org/10.1039/c6cp00910g.

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A novel nanorose-like metal organic system (MOS) based on Cu(ii) and biphenyl-4,4-dicarboxylic acid (Cu–BPDCA) doped by Ce(iii) was hydrothermally synthesized and characterized via EDS, FE-SEM, XRD, DRS and FT-IR analysis.

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Chua, Chun Kiang, Adeline Huiling Loo, and Martin Pumera. "Nanostructured MoS2 Nanorose/Graphene Nanoplatelet Hybrids for Electrocatalysis." Chemistry - A European Journal 22, no. 17 (March 10, 2016): 5969–75. http://dx.doi.org/10.1002/chem.201504875.

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Paranjape, Amit S., Roman Kuranov, Stepan Baranov, Li Leo Ma, Joseph W. Villard, Tianyi Wang, Konstantin V. Sokolov, Marc D. Feldman, Keith P. Johnston, and Thomas E. Milner. "Depth resolved photothermal OCT detection of macrophages in tissue using nanorose." Biomedical Optics Express 1, no. 1 (June 28, 2010): 2. http://dx.doi.org/10.1364/boe.1.000002.

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Hou, Jianhua, Jian Tang, Ke Feng, Faryal Idrees, Muhammad Tahir, Xianbin Sun, and Xiaozhi Wang. "The chemical precipitation synthesis of nanorose-shaped Bi4O5I2 with highly visible light photocatalytic performance." Materials Letters 252 (October 2019): 106–9. http://dx.doi.org/10.1016/j.matlet.2019.05.111.

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Wang, Jian Zhong, Li Dan Tang, Li Li Wang, Bing Wang, and Hui Ling Du. "Effect of Solution Concentration on Growth and Photoluminescence of ZnO Nanorod Arrays." Advanced Materials Research 299-300 (July 2011): 785–88. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.785.

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Well-aligned ZnO nanorod arrays had been successfully prepared by using hydrothermal methods. XRD and SEM analysis showed ZnO nanorod arrays had well orientation along the [0 0 1] direction of ZnO nanorods. The length to diameter is biggest among these samples and is about 25 when solution concentration is 0.8mol/l. The UV emission caused mainly by exciton combination. Furthermore the formation mechanism of ZnO nanorob arrays was studied in detail.

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Huang, Jung Jie, Ching Hsun Chao, Chao Nan Chen, Chun Fa Hsu, and Ming Wei Tsai. "Size Effect of Silver Nanoparticle Melted into ZnO Nanorods for Photocatalytic Activity." Applied Mechanics and Materials 284-287 (January 2013): 367–74. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.367.

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Ag/ZnO nanorod structure was synthesized by using the hydrothermal method to grow ZnO nanorods and melted silver nonoparticles into ZnO nanorods by thermal annealing process in vacuum at 700 oC. The photocatalytic activity for methylene blue decolorization is enhanced by silver nanoparticles melted into a ZnO nanorod structure owing to the formation of Schottky barrier near the Ag/ZnO interface prolongs the recombination of electron-hole pairs effectively. The size effect of silver nanoparticles in the Ag/ZnO nanorod structure for photocatalytic activity was discussed which was changed from 12 to 34 nm. The smaller silver nanoparticle size sample shows better decolorization efficiency of methylene blue solution owing to the higher surface area of Ag/ZnO nanoroad. Ag/ZnO nanorod films have been characterized by X-ray diffraction (XRD), UV-vis spectroscopy, field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The dye decolorization significantly increased from 69 to 99 % after UV light irradiation for 8 hr by the optimum Ag/ZnO nanorod film.

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Mahadik, Mahadeo A., Hee-Suk Chung, Hyeon Ih Ryu, Weon-Sik Chae, Min Cho, and Jum Suk Jang. "Efficient Way To Assemble CdS Nanorose-Decorated CdSe-Tetrakaidecahedron Heterojunction Photoanodes for High-Photoelectrochemical Performance." ACS Sustainable Chemistry & Engineering 7, no. 24 (November 11, 2019): 19708–19. http://dx.doi.org/10.1021/acssuschemeng.9b04868.

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Awaltanova, Ella, Amun Amri, Nicholas Mondinos, Mohammednoor Altarawneh, T. S. Y. Moh, Hantarto Widjaja, Lee Siang Chuah, et al. "Nanorose-like ZnCo2O4 coatings synthesized via sol–gel route: morphology, grain growth and DFT simulations." Journal of Sol-Gel Science and Technology 90, no. 3 (April 14, 2019): 450–64. http://dx.doi.org/10.1007/s10971-019-04987-4.

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Mirmotallebi, Mona, and Azam Iraji zad. "AC characterization of three-dimensional reduced graphene oxide/molybdenum disulfide nanorose hybrids for ethanol vapor detection." Applied Surface Science 520 (August 2020): 146346. http://dx.doi.org/10.1016/j.apsusc.2020.146346.

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Zhang, Yong, Long-Zhen Xie, Chao-Xin Yuan, Chun-Lin Zhang, Su Liu, Ying-Quan Peng, Hai-Rong Li, and Miao Zhang. "A ppb-Level Formaldehyde Gas Sensor Based on Rose-Like Nickel Oxide Nanoparticles Prepared Using Electrodeposition Process." Nano 11, no. 01 (January 2016): 1650009. http://dx.doi.org/10.1142/s1793292016500090.

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In this study, rose-like nickel oxide nanoparticles (diameter of 400–500[Formula: see text]nm) were prepared on indium tin oxide (ITO) glass substrates by a simple electrodeposition in NiSO[Formula: see text]6H2O solution. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscope (TEM) were used for analysis of the NiO nanoparticles. The effects of operating temperature on the sensor response and the response versus gas concentration properties of the NiO nanorose-based sensors were investigated. We determined the operating temperature of the gas sensors to be 230[Formula: see text]C, considering the proper sensitivity and a rapid response. In addition, gas-sensing characteristics of rose-like NiO nanoparticles to formaldehyde were investigated. It was shown that the sensors exhibited good response ([Formula: see text]/[Formula: see text]) properties to formaldehyde gas at 230[Formula: see text]C, making them to be promising candidates for practical detectors to formaldehyde gas.

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Wang, Tianyi, J. Jacob Mancuso, S. M. Shams Kazmi, Jordan Dwelle, Veronika Sapozhnikova, Brian Willsey, Li L. Ma, et al. "Combined two-photon luminescence microscopy and OCT for macrophage detection in the hypercholesterolemic rabbit aorta using plasmonic gold nanorose." Lasers in Surgery and Medicine 44, no. 1 (January 2012): 49–59. http://dx.doi.org/10.1002/lsm.21153.

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12

Berger, Nele, Ayoub Laghrissi, Yee Yan Tay, Thirumany Sritharan, Jacek Fiutowski, Horst-Günter Rubahn, and Mohammed Es-Souni. "Formation of Si Nanorods and Discrete Nanophases by Axial Diffusion of Si from Substrate into Au and AuPt Nanoalloy Nanorods." Nanomaterials 10, no. 1 (December 27, 2019): 68. http://dx.doi.org/10.3390/nano10010068.

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Interdiffusion between Si substrate and nanorod arrays of Au, Pt, and AuPt nanoalloys is investigated at temperatures lower than the AuSi eutectic temperature. When the nanorod is pure Au, Si diffusion from the substrate is very rapid. Au atoms are completely replaced by Si, converting the nanostructure into one of Si nanorod arrays. Au is diffused out to the substrate. The Au nanorod arrays on Si are unstable. When the nanorod is pure Pt, however, no diffusion of Si into the nanorod or any silicide formation is observed. The Pt nanorods are stable on Si substrate. When the nanorods are an alloy of AuPt, interesting interactions occur. Si diffusion into the nanorods is rapid but the diffusing Si readily reacts with Pt forming PtSi while Au diffuses out to the substrate. After annealing, nanophases of Au, Pt, PtSi, and Si may be present within the nanorods. When the Pt content of the alloy is low (12 at%) all Pt atoms are converted to silicide and the extra Si atoms remain in elemental form, particularly near the tip of the nanorods. Hence, the presence of Au accelerates Si diffusion and the ensuing reaction to form PtSi, a phenomenon absents in pure Pt nanorods. When the Au content of the alloy is low, the Si diffusion would cease when all Au atoms have diffused out of the nanorod, thereby arresting the silicide formation resulting in excess Pt in elemental form within the nanorod. This is a technique of making Si nanorods with and without embedded PtSi nanophase consisting of heterojunctions which could have unique properties.

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Shang, Jian, Ye Sun, Teng Zhang, Zhen Liu, and Hong Zhang. "Enhanced Antibacterial Activity of Ag Nanoparticle-Decorated ZnO Nanorod Arrays." Journal of Nanomaterials 2019 (April 30, 2019): 1–7. http://dx.doi.org/10.1155/2019/3281802.

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Silver (Ag) has broad-spectrum antibacterial properties and is widely used in various fields, including in antibacterial coatings for orthopedic implants. For reasons of cost and cytotoxicity, improvement of the antibacterial efficiency of Ag is necessary. The scientific community has also shown a strong enthusiasm in this research area. In this paper, ZnO nanorod arrays were prepared on a titanium (Ti) substrate by seed-assisted hydrothermal method and Ag nanoparticles were deposited by magnetron sputtering to obtain Ag nanoparticle-decorated ZnO nanorod arrays (ZnO nanorods/Ag nanoparticles). The antibacterial properties of ZnO nanorods/Ag nanoparticles against Pseudomonas aeruginosa were systematically studied by agar diffusion method and were compared with other samples such as ZnO nanorod arrays and ZnO seed layer/Ag nanoparticles. The experimental results showed that ZnO nanorods/Ag nanoparticles displayed significantly higher antibacterial properties against Pseudomonas aeruginosa than other samples, including ZnO nanorod arrays and ZnO seed layer/Ag nanoparticles. These superior antibacterial properties originated predominantly from the morphological structure of ZnO nanorods, which optimized the particle size and distribution of Ag nanoparticles, greatly improving their antimicrobial efficiency. The synergistic antibacterial properties of Ag nanoparticles and ZnO nanorods make Ag nanoparticle-decorated ZnO nanorod arrays a promising candidate for antibacterial coating of orthopedic implants.

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14

Wong, C. P., and C. L. Mak. "Fabrication and Characterization of ZnO Nanorod Arrays Grown on Nickel-Coated Polyester Fiber." Advanced Materials Research 463-464 (February 2012): 385–93. http://dx.doi.org/10.4028/www.scientific.net/amr.463-464.385.

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Vertical-aligned arrays of zinc oxide (ZnO) nanorod were grown on nickel-coated polyester s for future development of ZnO nanorod-based solar cells. ZnO nanorods with aspect ratio of three were deposited by chemical solution deposition (CBD). Besides, an underlying ZnO seed layer was introduced to grow large-area and continuous layer of ZnO nanorods using pulsed laser deposition (PLD). Structurally, dominating XRD diffraction of the ZnO nanorod arrays was occurred at lattice plane (002) and a specific Raman spectrum was also obtained. Optically, bandgap energy of the ZnO nanorods was 3.95 eV. The ZnO nanorods with full-width at half-maximun (FWHM) of about 16 nm were excited normally from ultraviolet laser source of λ=266 nm and released edge-emission of λ=383 nm. On the basis of our results, high quality ZnO nanorods have been successfully fabricated on nickel-coated polyester fibers.

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15

Huang, Chan-yan, Yan Sun, Xin Chen, and Ning Dai. "Multilayer Hybrid Structure of ZnO Nanorod Arrays Imbedded in TiO2 Network as Photoanode." MRS Proceedings 1493 (2013): 111–16. http://dx.doi.org/10.1557/opl.2013.420.

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ABSTRACTWe developed a multilayer hybrid structure by imbedding ZnO nanorod arrays in TiO2 network for each layer, for the pourese of taking ZnO nanorods as the highway of electron transport. ZnO nanorods can be prepared by hydrothermal process, which is simple, low cost and easy control. The ZnO nanorod arrays were grown by reported hydrothermal method, then TiO2 network was constructed by spin-coating titanium precursor sol on ZnO nanorod arrays and calcining. The electrochemical impedance spectrum measurements were taken to study the electrical properties of this kind of hybrids, and the results indicated that the effective electron lifetime reaches a magnitude of microsecond which is similar to the pure ZnO nanorod arrays. It reveals to us that ZnO nanorods may dominate the electrical properties of this nano-hybrid structure.

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Nik Aziz, N. A., M. I. N. Isa, and Hasiah Salleh. "Effect of Time Conditions on the Growth of ZnO Nanorods via Hydrothermal Method." Advanced Materials Research 895 (February 2014): 509–12. http://dx.doi.org/10.4028/www.scientific.net/amr.895.509.

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In this study, ZnO nanorod arrays were fabricated using a hydrothermal method on ITO glass substrate. We can find that the dimension of ZnO nanorod will changes with different growth temperature. X-ray diffraction (XRD) patterns show that the nanorods are high-quality crystals growing along [00 direction with a high consistent orientation perpendicular to the substrate and it is also revealed that nanorods have wurtzite crystal structure. The diameter of ZnO nanorods were 100300 nm depending on the time of growth process. The surface morphology of ZnO nanorods were analyse using Scanning Electron Microscope (SEM).

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Hsin, Cheng Lun, Wen Wei Wu, Hung Chang Hsu, and Lih Juann Chen. "In Situ Observation of Quantized Growth of Titanium Silicide in Ultra High Vacuum Transmission Electron Microscope (UHV-TEM)." Advances in Science and Technology 51 (October 2006): 14–19. http://dx.doi.org/10.4028/www.scientific.net/ast.51.14.

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Dynamic study of the growth of TiSi2 nanorods on Si bicrystal was conducted in an ultrahigh vacuum transmission electron microscope. The growth of the nanorods was affected by the underlying dislocation grids significantly. The dislocation grids confined the shape of the nanoclusters and nanorods. Compared to the time of the nanorod remaining at the same length, the elongating time is relatively short. The dislocation network confined the nanorod to match the dislocation interspacing and the step-wise growth of the nanorod was found. The growth mechanism is attributed to the compliant effect. The observation was constructive to the basic understanding of the stress effect on the initial stage of the reaction of metals on Si.

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Wei, Lin, Guang Hua Zhang, Kang Li, Jun Jiao, and Yan Xue Chen. "Growth and Optical Properties of ZnO Nanorod Arrays." Materials Science Forum 663-665 (November 2010): 88–91. http://dx.doi.org/10.4028/www.scientific.net/msf.663-665.88.

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ZnO nanorod arrays were prepared using a chemical solution route on fluorine-doped SnO2 conductive glass pre-coated by a thin ZnO seed layer. Morphology, crystal structure and growth direction of the nanorod arrays were characterized by SEM and XRD respectively. The SEM results demonstrated that ordered arrays of ZnO nanorods grew vertically on the substrate. XRD measurement revealed the ZnO nanorods were grown along the [002] direction of the ZnO crystallites. Under optimal condition, ZnO nanorods with the average length about 6-7 μm and the diameters about 10nm at the tip and 150 nm at the base were obtained. The optical properties of ZnO nanorod arrays were characterized by transmittance spectra and photoluminescence measurement at room temperature.

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Hsu, W. Chuck, Yen-Sheng Lu, Jung-Yi Chyan, and J. Andrew Yeh. "High-Efficiency 6′′ Multicrystalline Black Solar Cells Based on Metal-Nanoparticle-Assisted Chemical Etching." International Journal of Photoenergy 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/197514.

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Multicrystalline silicon (mc-Si) photovoltaic (PV) solar cells with nanoscale surface texturing by metal-nanoparticle-assisted etching are proposed to achieve high power efficiency. The investigation of average nanorod lengths from 100 nm to 1 μm reveals that the Si wafer decorated with 100 nm thick nanorods has optical reflection of 9.5% inferior than the one with 1 μm thick nanorods (2%). However, the short nanorods improve the doping uniformity and effectively decrease metal contact resistance. After surface passivation using the hydrogenated SiO2/SiNx(5 nm/50 nm) stack, the minority carrier lifetime substantially increases from 1.8 to 7.2 μs for the 100 nm-thick nanorod solar cell to achieve the high power efficiency of 16.38%, compared with 1 μm thick nanorod solar cell with 11.87%.

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Song, Juan, and Yang Yu. "Numerical Simulation of ZnO Nanorod Assisted Light Extraction of Organic Light-Emitting Diode (OLED)." Applied Mechanics and Materials 121-126 (October 2011): 2819–23. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.2819.

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In this paper, ZnO nanorod film has been constructed on the OLED emission surface to investigate its light-extraction enhancement effect. Similar to the ZnO nanorods film obtained experimentally by chemical bath method, the modeled ZnO nanorod film is also granted the randomly distribution characteristics. Major attention is paid to study the effect of the orientation of the ZnO nanorods on enhancement degree of light extraction. FDTD simulations indicate that the ZnO nanorods with a randomly oblique alignment can make more light extracted outside the chip compared to the ZnO nanorods possessing the rigorously vertical alignment. This conclusion shows that excessive requirement for excellent alignment of ZnO nanorods does not make any sense in optimization of OLED light emission. This makes optimization of light emission of LED by ZnO nanorods prepared through liquid-phase method much easier to implement.

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MALCIOĞLU, OSMAN BARIŞ, and ŞAKIR ERKOÇ. "STRUCTURAL PROPERTIES OF DIAMOND NANORODS: MOLECULAR-DYNAMICS SIMULATIONS." International Journal of Modern Physics C 14, no. 04 (May 2003): 441–47. http://dx.doi.org/10.1142/s0129183103004644.

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The structural properties of carbon nanorods obtained from diamond crystal have been investigated by performing molecular-dynamics computer simulations. Calculations have been realized by using an empirical many-body potential energy function for carbon. Diamond nanorods have been generated from three low-index planes of diamond crystal. It has been found that the average coordination number, cross-section geometry, and surface orientation from which the nanorod is generated play a role in the stability of diamond nanorods under heat treatment. The most stable diamond nanorod has been obtained from the (111) surface.

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Yang, Li Rong, Jun Cong Wei, Li Zhang, and Hai Bin Chen. "Synthesis of ZnO Nanorod Arrays on Chaleted Sol-Gel-Derived ZnO Thin Films and its Optical Absorption in Visible-Light Region." Advanced Materials Research 750-752 (August 2013): 253–58. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.253.

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Well-aligned ZnO nanorod arrays on Chaleted Sol-Gel-Derived ZnO thin films was achieved at a temperature of 90°C by a surfactant-assisted soft chemical approach. The nanorod arrays were characterized by XRD, SEM, XPS, and UV-Vis absorbance spectra. The ZnO nanorod arrays are wurtzite crystal stuctures preferentially orienting in the direction of the c-axis and ZnO nanorods are grown verticallyon the substrate. The XPS analysis shows the Zn:O ratio of ZnO nanorod arrays near is 1:1. The UV-Vis absorbance spectra indicate that ZnO nanorod arrays have absorption of visible-light as well as ultraviolet-light. Therefore, the ZnO nanorods may be good candidates for visible-light photocatalysis materials from the viewpoint of practical applications.

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Xia, Yong Mei, You Fa Zhang, Xin Quan Yu, and Feng Chen. "Controllable Growth of Highly Oriented ZnO Nanorod Arrays on Copper by a Two-Step Route." Advanced Materials Research 1119 (July 2015): 137–41. http://dx.doi.org/10.4028/www.scientific.net/amr.1119.137.

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Highly oriented and well-aligned ZnO nanorod arrays were synthesized by low-temperature solution phase method on copper substrate under different conditions. Results illustrated that dense ZnO nanorods were vertically and uniformly distributed on the substrate. The effects of precursor concentration, growth temperature and time on the morphologies of nanorod arrays were investigated systematically. It is demonstrated that the controllable growth of well-aligned ZnO nanorods can be realized by readily adjusting the preparation parameters. The high quality ZnO nanorod arrays could be achieved via the chemical approach at low temperature.

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Khan, Saleh, Xiao-He Liu, Xi Jiang, and Qing-Yun Chen. "Facile Synthesis of a Porous ZnO Nanorod Array with Enhanced Photocatalysis for Photoelectrochemical Water Splitting Application." Journal of Nanoscience and Nanotechnology 20, no. 6 (June 1, 2020): 3512–18. http://dx.doi.org/10.1166/jnn.2020.17411.

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Highly efficient and effective porous ZnO nanorod arrays were fabricated by annealing ZnO nanorod arrays grown on a substrate using a simple hydrothermal method. The annealing had a positive effect on the nanorod morphology, structure and optical properties. The porosity was closely related to the annealing temperature. After heating at 450 °C, pores appeared on the nanorods. It was demonstrated that the porosity could be exploited to improve the visible light absorption of ZnO and reduce the bandgap from 3.11 eV to 2.99 eV. A combination of improved charge separation and transport of the heat-treated ZnO thus led to an increase in the photoelectrochemical properties. At an irradiation intensity of 100 mW/cm−2, the photocurrent density of the porous nanorod array was approximately 1.3 mA cm−2 at 1.2 V versus Ag/AgCl, which was five times higher than that of the ZnO nanorods. These results revealed the synthesis of promising porous ZnO nanorods for photoelectrochemical applications.

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Sharma, Soni, and A. Vijay. "Nonlinear laser absorption over a dielectric embedded with nanorods." Laser and Particle Beams 37, no. 4 (November 11, 2019): 381–85. http://dx.doi.org/10.1017/s0263034619000545.

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AbstractAn analytical formalism of laser absorption in a nanorod embedded dielectric surface has been developed. Nanorods lie in the plane of the dielectric, in the form of a planar array. A laser, impinged on them with an electric field perpendicular to the lengths of the nanorods, imparts oscillatory velocity to nanorod electrons. As the free electrons of a nanorod are displaced, a space charge field is developed in the nanorod that exerts restoration force on the electrons and their drift velocity shows a resonance at ${\rm \omega} = {\rm \omega} _{\rm p}/\sqrt 2 $, where ωp denotes the plasma frequency of free electrons inside the nanorod. It is inhibited by collisions and nanorod expansion. At the resonance, the electrons are efficiently heated by the laser and laser energy is strongly absorbed, resulting in significant reduction in laser transmissivity. The transmissivity decreases with laser intensity.

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WATER, WALTER, TE-HUA FANG, LIANG-WEN JI, and CHING-CHIN LEE. "OPTICAL CHARACTERIZATION OF ZnO NANOROD ARRAYS GROWN FROM SOLUTION." International Journal of Nanoscience 09, no. 05 (October 2010): 447–51. http://dx.doi.org/10.1142/s0219581x10007186.

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ZnO nanorods were synthesized on ZnO / ITO glass substrates using an aqueous solution of zinc nitrate hexahydrate and hexamethylenetetramine. The effects of hexamethylenetetramine concentration on the crystalline structure and surface morphology of ZnO nanorods were investigated. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to analyze the crystalline characteristics and microstructures of the nanorod arrays. Ultraviolet/visible spectroscopy and photoluminescence (PL) spectra were used to characterize the optical properties of ZnO nanorods. Larger and brighter photoluminescent ZnO nanorods were obtained from solutions with higher hexamethylenetetramine concentrations. A nanogenerator based on ZnO nanorod arrays was fabricated in the investigation. The nanogenerator's current–voltage characteristics with Schottky-like behavior were discussed.

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Huang, Fei, Ai Hua Yan, Zheng Yi Fu, Fan Zhang, Ying Huai Qiang, and Shi Bin Yin. "Template-Free Synthesis of Hierarchical m-ZrO₂ Nanorods and its Formation Mechanism." Advanced Materials Research 662 (February 2013): 76–79. http://dx.doi.org/10.4028/www.scientific.net/amr.662.76.

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Hierarchical ZrO2 nanorods have recently received considerable attention due to their special physical and chemical properties. However, traditional preparation methods are involved in expensive equipment, complicated process and high production cost. Here we report a simple hydrothermal approach to prepare hierarchical ZrO2 nanorod. The results show that as-synthesized products are composed of many nanorods with 80~150 nm in diameter and 15~20 μm in length. After annealing, the final product was involved into hierarchical monoclinic ZrO2 (m-ZrO2) nanorods, namely, the big nanorod was made up of many small nanorods with 20~30 nm in diameter and 300~500 nm in length. The possible formation mechanism was proposed based on a series of chemical reactions and the natural properties of zirconium.

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Redkin, Arkady N., Eugene E. Yakimov, Maria V. Evstafieva, and Eugene B. Yakimov. "Grown and Characterization of ZnO Aligned Nanorod Arrays for Sensor Applications." Energies 14, no. 13 (June 22, 2021): 3750. http://dx.doi.org/10.3390/en14133750.

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ZnO nanorods are promising materials for many applications, in particular for UV detectors. In the present paper, the properties of high crystal quality individual ZnO nanorods and nanorod arrays grown by the self-catalytic CVD method have been investigated to assess their possible applicationsfor UV photodetectors. X-ray diffraction, Raman spectroscopy and cathodoluminescence investigations demonstrate the high quality of nanorods. The nanorod resistivity and carrier concentration in dark is estimated. The transient photocurrent response of both as grown and annealed at 550 °C nanorod array under UV illumination pulses is studied. It is shown that annealing increases the sensitivity and decreases the responsivity that is explained by oxygen out-diffusion and the formation of near surface layer enriched with oxygen vacancies. Oxygen vacancy formation due to annealing is confirmed by an increase of green emission band intensity.

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Lai, Ming-Hong, Auttasit Tubtimtae, Ming-Way Lee, and Gou-Jen Wang. "ZnO-Nanorod Dye-Sensitized Solar Cells: New Structure without a Transparent Conducting Oxide Layer." International Journal of Photoenergy 2010 (2010): 1–5. http://dx.doi.org/10.1155/2010/497095.

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Conventional nanorod-based dye-sensitized solar cells (DSSCs) are fabricated by growing nanorods on top of a transparent conducting oxide (TCO, typically fluorine-doped tin oxide—FTO). The heterogeneous interface between the nanorod and TCO forms a source for carrier scattering. This work reports on a new DSSC architecture without a TCO layer. The TCO-less structure consists of ZnO nanorods grown on top of a ZnO film. The ZnO film replaced FTO as the TCO layer and the ZnO nanorods served as the photoanode. The ZnO nanorod/film structure was grown by two methods: (1) one-step chemical vapor deposition (CVD) (2) two-step chemical bath deposition (CBD). The thicknesses of the nanorods/film grown by CVD is more uniform than that by CBD. We demonstrate that the TCO-less DSSC structure can operate properly as solar cells. The new DSSCs yield the best short-current density of 3.96 mA/ and a power conversion efficiency of 0.73% under 85 mW/ of simulated solar illumination. The open-circuit voltage of 0.80 V is markedly higher than that from conventional ZnO DSSCs.

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Obeas, Laith K., Alwaleed khalid ghalib, G. Abdul kareem-Alsultan, N. Asikin Mijan, and Robiah Yunus. "A-Review on Nanorods-An Overview from Synthesis to Emerging, Device Applications and Toxicity (A-Review)." Oriental Journal Of Chemistry 37, no. 2 (April 30, 2021): 256–68. http://dx.doi.org/10.13005/ojc/370201.

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Nanorod technology has gone a long way in the field of science and to a great extent, it has been a dictator of the past, present, and future of technology work. This article shows a detailed explanation of the course of nanorod production and the application from start to finish. Various kinds of nanorods have been found to exist and they have been maximally put to good use in different fields of life. These nanorods, however, did not just come into existence, some of them were formed from some nanorod compounds while some other ones came into being as a result of the combination of two or more compounds. These particles in their raw form can be generally useful, but its specific functions cannot be gotten without proper optimization. Various researchers have, dedicated their time to proper optimization of the numerous nanorods that are available in order to find an optimum result science. This course scans through the birth, processing as well as the highly valued application of nanorods.

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Gu, Xi, Victoria Timchenko, Guan Heng Yeoh, Leonid Dombrovsky, and Robert Taylor. "The Effect of Gold Nanorods Clustering on Near-Infrared Radiation Absorption." Applied Sciences 8, no. 7 (July 12, 2018): 1132. http://dx.doi.org/10.3390/app8071132.

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In this paper, the plasmonic resonant absorption of gold nanorods (GNRs) and GNR solutions was studied both numerically and experimentally. The heat generation in clustered GNR solutions with various concentrations was measured by exposing them to Near Infrared (NIR) light in experiment. Correspondingly, calculations based on the discrete-dipole approximation (DDA) revealed the same relationship between the maximum absorption efficiency and the nanorod orientation for the incident radiation. Additionally, both the plasmonic wavelength and the maximum absorption efficiency of a single nanorod were found to increase linearly with increasing aspect ratio (for a fixed nanorod volume). The wavelength of the surface plasmonic resonance (SPR) was found to change when the gold nanorods were closely spaced. Specifically, both a shift and a broadening of the resonance peak were attained when the distance between the nanorods was set to about 50 nm or less. The absorbance spectra of suspended nanorods at various volume fractions also showed that the plasmonic wavelength of the nanorods solution was at 780 ± 10 nm, which was in good agreement with the computational predictions for coupled side-by-side nanorods. When heated by NIR light, the rate of increase for both the temperature of solution and the absorbed light diminished when the volume fraction of suspended nanorods reached a value of 1.24×10−6. This matches with expectations for a partially clustered suspension of nanorods in water. Overall, this study reveals that particle clustering should be considered to accurately gauge the heat generation of the GNR hyperthermia treatments.

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Huo, Junchao, Yanjie Hu, Hao Jiang, Wenjuan Huang, and Chunzhong Li. "SnO2 nanorod@TiO2 hybrid material for dye-sensitized solar cells." J. Mater. Chem. A 2, no. 22 (2014): 8266–72. http://dx.doi.org/10.1039/c4ta00083h.

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We have developed a novel SnO₂ nanorod@TiO₂ hybrid material by coating a layer of TiO₂ on the surface of SnO₂ nanorods. The power conversion efficiency (η) of the SnO₂ nanorod@TiO₂ hybrid material electrode is 6.98%, much higher than that of the SnO₂ nanorods electrode (3.95%) and P25 electrode (5.27%).

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Li, Fen, Su Juan Hu, Li Dong Wei, Bo Chi, and Jian Li. "Fabrication of Morphology Controllable Vertically Aligned TiO₂ Nanorod Arrays for Dye-Sensitized Solar Cells." Key Engineering Materials 680 (February 2016): 278–81. http://dx.doi.org/10.4028/www.scientific.net/kem.680.278.

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In this work, vertically aligned TiO2 nanorod arrays (NR) are synthesized directly on FTO coated glass substrate by hydrothermal method. The samples are characterized by XRD, SEM, TEM and the results indicate that the 1-D nanorods are of single crystal rutile structure with growth direction along the [001] direction. The morphology (diameter, thickness and density) of the nanorods can be adjusted by changing the precursor amounts. The possible growth mechanism of TiO2 nanorods on FTO substrate has also been briefly discussed in this work. For dye-sensitized solar cells (DSSCs) fabricated of different thickness nanorods, a power conversion efficiency (PCE) of 1.74% has been achieved by using ~3μm nanorod arrays under simulated AM 1.5 illumination (100 mW cm-2). It is expected that the 1-D nanorods can be composited with other nanomaterial of different structures and morphologies to enhance the efficiency of DSSCs.

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Rafaie, Hartini Ahmad, Roslan Md Nor, and Yusoff Mohd Amin. "Effect of Growth Time to the Structural and Field Emission Properties of ZnO Nanorods Prepared by Sol-Gel Method." Advanced Materials Research 1109 (June 2015): 15–19. http://dx.doi.org/10.4028/www.scientific.net/amr.1109.15.

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The structural and field emission properties of ZnO nanorod at different growth time by sol-gel method have been successfully prepared. FESEM results illustrated that dense ZnO nanorods with hexagonal wurtzite structure were vertically well-aligned and uniformly distributed on the substrate. X-ray diffraction pattern analysis shows that all the obtained ZnO nanorods can be indexed to the hexagonal ZnO wurtzite structure. Field emission measurement was conducted for ZnO nanorod growth at different time to study emission properties. The turn-on field value decreases while field enhancement value increases as longer growth time was applied which related to the increasing of aspect ratio of ZnO nanorod respectively.

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Ma, Zhenhe, Yafei Li, Qiongchan Gu, Sheng Hu, Yu Ying, Zhigang Li, Xiaoxiao Jiang, and Jiangtao Lv. "Dynamic Plasmon Resonance Tuning for Surface Enhanced Sensing." Journal of Nanoscience and Nanotechnology 19, no. 6 (June 1, 2019): 3643–46. http://dx.doi.org/10.1166/jnn.2019.16118.

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We report on fabricating plasmonic nanorod crystals using focused ion beam lithography. We first demonstrate manipulating the profiles of nanorods perpendicularly aligned with the substrate. Then we show accurate control of nanorod outlines can be achieved. We also show that it is feasible to manufacture nanorods obliquely aligned with the substrate. Tunable plasmon resonance can be realized with different tilting angles and geometries. Our approach may find important applications in plasmon-assisted sensing and surface enhanced spectroscopy.

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Ghapur, Engku Abd Engku Ali, W. A. Dhafina, S. Hasiah, and N. A. N. Ali. "Effect of the ZnO Rods Growth Time to the Conductivity of ZnO Thin Film Combined with N3 Dye." Advanced Materials Research 383-390 (November 2011): 3286–90. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.3286.

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In this work, ZnO nanorod has been grown by hydrothermal solution method. The samples were prepared by two stages. The first stage was seeding process where the ZnO nanoparticles are spin-casted onto ITO coated glasses and the second stage was hydrothermal process. The morphology of nanorods were investigated by using scanning electron microscope (SEM) and different of length and diameter of nanorods with different growth durations have been observed. The differences of diameters and aspect ratio of nanorods have affected the optical and electrical properties of the ZnO-coated thin film with dye due to its surface area and morphologies of growth rod. Aspect ratio of ZnO nanorods increases by increasing the reaction time (growth time). From the band gap energy study, the thin film with the longest ZnO nanorods growth time has the lowest band gap energy (3.55 eV). The higher aspect ratio of the nanorod affected the conductivity, by increasing the conductivity when combined with N3 dye.

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Zhang, Wei, Lili Feng, Haiyun Chen, and Yinyin Zhang. "Hydrothermal Synthesis of SnO2 Nanorod as Anode Materials for Lithium-Ion Battery." Nano 14, no. 09 (September 2019): 1950109. http://dx.doi.org/10.1142/s1793292019501091.

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In this study, SnO2 nanorods are successfully prepared by simple template-free hydrothermal method without surfactant. SnO intermediate with lamellar morphology is first formatted by hydrothermal method and SnO2 nanorods are obtained after calcinations. The results of XRD characterization show that lamellar structured SnO intermediate has preferred orientation in 0 0 1 direction. According to supposed mechanism during formation process of SnO2 nanorods, tiny crystal nucleus of Sn(OH)2 and a bit of SnCO3 are generated from SnCl2 and urea. Then the crystal nucleus gather together to form a nanorod. With continued reaction, nanorods gather together to form sheets and the sheets grow up to lamellar morphology and the intermediate decomposes into SnO because of the hydrothermal process. The SnO intermediate convert to SnO2 with sheets breaking to nanorods after calcination. The results of galvanostatic cell cycling show that SnO2 particle has high specific discharge capacity capacity. This experiment of SnO2 nanorod preparation provides us an effective way of easy processing, low cost, and more environmentally synthesis strategy to synthesize SnO2 nanorods.

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Oros, Chaiyan, Anurat Wisitsoraat, and Mati Horprathum. "Fabrication and Ethanol Sensing Characterization of Tin Oxide Nanorods Prepared by Glancing Angle Deposition Technique." Key Engineering Materials 675-676 (January 2016): 163–66. http://dx.doi.org/10.4028/www.scientific.net/kem.675-676.163.

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In this work, the nanorod structure of Tin oxide (SnO2) prepared by glancing angle deposition (GLAD) technique with different O2 flow rate from 12 to 48 sccm. The surface and Crystal structure of SnO2 thin films were characterized by scanning electron microscopy (SEM), X-raydiffraction (XRD) and tested toward ethanol gas sensing. Structural characterization showed that the morphological of all SnO2 thin films prepared with different O2 flow rates consists of columnar nanorod structures and the nanorod size which are likely to decrease as the O2 flow rate increases. As the O2 flow rate increases from 12 to 48 sccm, the crystal structure of SnO2 nanorods changes from amorphous to crystalline and the crystallinity is improved by the increase of the O2 flow rate. Gas sensing performances of SnO2 nanorods have been characterized toward ethanol sensing. It was found that SnO2 nanorods exhibit n-type conductivity with decreased resistance when exposed to ethanol, which is reducing gas. In addition, sensitivity to ethanol tend to improve as O2 flow rate increases. Furthermore, the SnO2 nanorods prepared at O2 flow rates 48 sccm are detecting ethanol gas at concentrations lower than 50 ppm at operating temperature 250 °C.

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Zhu, Zuoming, Tamar Andelman, Ming Yin, Tsung-Liang Chen, Steven N. Ehrlich, Stephen P. O'Brien, and Richard M. Osgood. "Synchrotron x-ray scattering of ZnO nanorods: Periodic ordering and lattice size." Journal of Materials Research 20, no. 4 (April 1, 2005): 1033–41. http://dx.doi.org/10.1557/jmr.2005.0134.

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We demonstrate that synchrotron x-ray powder diffraction (XRD) is a powerful technique for studying the structure and self-organization of zinc-oxide nanostructures. Zinc-oxide nanorods were prepared by a solution-growth method that resulted in uniform nanorods with 2-nm diameter and lengths in the range 10–50 nm. These nanorods were structurally characterized by a combination of small-angle and wide-angle synchrotron XRD and transmission electron microscopy (TEM). Small-angle XRD and TEM were used to investigate nanorod self-assembly and the influence of surfactant/precursor ratio on self-assembly. Wide-angle XRD was used to study the evolution of nanorod growth as a function of synthesis time and surfactant/precursor ratio.

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Fu, Yanchun, Wansi Fu, Yongzhuang Liu, Guozheng Zhang, Yixing Liu, and Haipeng Yu. "Comparison of ZnO nanorod array coatings on wood and their UV prevention effects obtained by microwave-assisted hydrothermal and conventional hydrothermal synthesis." Holzforschung 69, no. 8 (October 1, 2015): 1009–14. http://dx.doi.org/10.1515/hf-2014-0156.

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AbstractZnO nanorod array coatings were successfully synthesized on wood surfaces using a conventional hydrothermal (CHT) and a microwave-assisted hydrothermal (MWHT) method. The reaction time of the MWHT method at high temperature was only 1/12th that of the CHT method. The MWHT-ZnO nanorods exhibited better crystallinity than those produced by the CHT method. The ZnO nanorod had a wurtzite crystal structure oriented along thec-axis. The MWHT nanorods with their higher (002)/(101) ratio were more conducive and improved the orientation degree of the ZnO nanorods. Field emission scanning electron microscopy (FE-SEM) images showed that the MWHT-ZnO nanorods had smaller diameters and narrower size distributions than those produced by the CHT method. However, both methods formed well-aligned array coatings that covered the wood surfaces, and the two coatings had similar UV protecting effects and inhibited discoloration.

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Lai, Fang-I., Jui-Fu Yang, Woei-Tyng Lin, Wei-Chun Chen, Yu-Chao Hsu, and Shou-Yi Kuo. "Correlation of Morphology Evolution with Carrier Dynamics in InN Films Heteroepitaxially Grown by MOMBE." Catalysts 11, no. 8 (July 22, 2021): 886. http://dx.doi.org/10.3390/catal11080886.

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In this study, we report the catalyst-free growth of n-type wurtzite InN, along with its optical properties and carrier dynamics of different surface dimensionalities. The self-catalyzed epitaxial growth of InN nanorods grown by metal–organic molecular-beam epitaxy on GaN/Al2O3(0001) substrates has been demonstrated. The substrate temperature is dominant in controlling the growth of nanorods. A dramatic morphological change from 2D-like to 1D nanorods occurs with decreasing growth temperature. The InN nanorods have a low dislocation density and good crystalline quality, compared with InN films. In terms of optical properties, the nanorod structure exhibits strong recombination of Mahan excitons in luminescence, and an obvious spatial correlation effect in phonon dispersion. The downward band structure at the nanorod surface leads to the photon energy-dependent lifetime being upshifted to the high-energy side.

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Pujiarti, Herlin, Yolla Sukma Handayani, Annisa Aprilia, and Rahmat Hidayat. "The Cell Performances of DSSCs with ZnO Nanorod Electrodes." Materials Science Forum 1028 (April 2021): 168–72. http://dx.doi.org/10.4028/www.scientific.net/msf.1028.168.

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To date, dye-sensitized solar cells (DSSCs) based on TiO2 nanoparticles have been widely investigated due to their high conversion efficiency. However, constructing TiO2 into a structure of nanorods with a high aspect ratio is difficult to be achieved. On the other hand, nanorod/nanowire arrays may provide some advantages, such as an efficient pathway for electron transport and a larger surface area for dye absorption. ZnO is one kind of metal oxides that can be formed into nanorods easily with various methods. Here, we reported our works on the preparation of ZnO nanorods and investigate its DSSC performance. We found that the cell performance was very affected by the diameter of the nanorods, which may then indicate that charge transfer and charge extraction processes are more effective in the cell with a smaller nanorod diameter.

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Yang, Li Xia, Bing Liu, and Gui Hua Li. "Morphology-Controlled Fabrication of CuO Architectures." Advanced Materials Research 581-582 (October 2012): 544–47. http://dx.doi.org/10.4028/www.scientific.net/amr.581-582.544.

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CuO nanorod arrays, networks of nanosheets and pistachio nuts consisting nanorods were prepared via a multi-step synthesis method starting from copper oxalate precursor. CuO nanorod arrays were prepared by solid state thermal calcination of Cu(OH)2 nanorod arrays through the reaction of copper oxalate precursor with NaOH at 40°C. CuO networks of nanosheets were obtained by treatment at 60°C for 90min, and CuO pistachio nuts consisting nanorods were obtained at 80°C for 20min. The products were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM).The influences of temperature and reaction time on the synthesis of CuO were investigated. The formation mechanism of CuO nanostructures was discussed.

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Gu, Yu, Ruslan Burtovyy, John Custer, Igor Luzinov, and Konstantin G. Kornev. "A gradient field defeats the inherent repulsion between magnetic nanorods." Royal Society Open Science 1, no. 2 (October 2014): 140271. http://dx.doi.org/10.1098/rsos.140271.

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When controlling the assembly of magnetic nanorods and chains of magnetic nanoparticles, it is extremely challenging to bring them together side by side while keeping a desired spacing between their axes. We show that this challenge can be successfully resolved by using a non-uniform magnetic field that defeats an inherent repulsion between nanorods. Nickel nanorods were suspended in a viscous film and a non-uniform field was used to control their placement. The in-plane movement of nanorods was tracked with a high-speed camera and a detailed image analysis was conducted to quantitatively characterize the behaviour of the nanorods. The analysis focused on the behaviour of a pair of neighbour nanorods, and a corresponding dynamic model was formulated and investigated. The complex two-dimensional dynamics of a nanorod pair was analysed analytically and numerically, and a phase portrait was constructed. Using this phase portrait, we classified the nanorod behaviour and revealed the experimental conditions in which nanorods could be placed side by side. Dependence of the distance between a pair of neighbour nanorods on physical parameters was analysed. With the aid of the proposed theory, one can build different lattices and control their spacing by applying different field gradients.

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Zhang, Duo, Yi Ju, and Lin Zhang. "Computational Study of Thermal Stabilities of Cu Nanorods at Atomic Scale." Applied Mechanics and Materials 275-277 (January 2013): 1802–5. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.1802.

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Due to its unique mechanical，electrical，optical，chemical，catalytic and biological properties, nano-scale materials such as metal nanorods, have attracted wide attention. In these low-dimensional systems， Cu nanorods are ideal systems in novel electronic nano-devices and nano-catalysis. Nowadays the research of Cu nanorod has already become one of the central subjects in the nanomaterials science.In this paper, molecular dynamics simulations have been used to study structural changes of Cu nanorod during heating within the framework of embedded atom method (EAM) at the atomic scale，and their dynamics are also studied. During continuously heating processes, by studying the structure of the metal nanorods on the pair distribution function and energy changes，they are studied for the structural changes and dynamic properties of the Cu nanorods.The simulation results show that continuous changes of the Cu nanorods upon heating. At low temperatures, both the Cu nanorods have ordered arrangements with face-centered cubic structures. With increasing the temperature，the atom arrangements present the changes from the ordered state into the disordered state. It is also found that the size and shape of the nanorods have effect on the structural changes of these nanorods in the heating processes. The results show that the initial geometry of the nanorods greatly affect the structural change processes.

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Benkara, Salima, and Houda Ghamri. "Preparation and Characterization of ZnO/TiO₂ Nanocomposite by Anodization and Hydrothermal Synthesis." International Letters of Chemistry, Physics and Astronomy 55 (July 2015): 27–33. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.55.27.

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ZnO nanorod arrays were deposited by hydrothermal process via an aqueous solution with ammonia and Zinc nitrate as inorganic precursors, using TiO2 nanotube templates formed in HF solution by anodization method. The effect of NH3.H2O and ZnNO3 concentration on ZnO nanorods morphology and crystallinity were investigated. XRD demonstrates that ZnO nanorods are wurtzite crystal structure preferentially oriented in c-axis direction. The length and the diameter of the ZnO nanorod range from 1,1 mm to 3,4 mm and from 250 to 500 nm respectively.

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Cross, Michael, and Walter Varhue. "Influence of Electrostatic Forces on the Growth of One-Dimensional Nanostructures." Journal of Nanomaterials 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/105782.

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The growth of crystalline ruthenium oxide square nanorods was considered on numerous substrate materials. The nanorods were found to grow easily on insulating substrates, while their growth on electrically conducting and grounded substrates was inhibited. The transfer of electrons from the plasma discharge to the developing nanorods caused the nanorods to be negatively charged and obtain a floating potential relative to ground. The electrical charging of the nanorod played a key role in their development.

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Jue, Miyeon, Sanghwa Lee, Bjorn Paulson, Jung-Man Namgoong, Hwan Yu, Gwanho Kim, Sangmin Jeon, et al. "Optimization of ZnO Nanorod-Based Surface Enhanced Raman Scattering Substrates for Bio-Applications." Nanomaterials 9, no. 3 (March 17, 2019): 447. http://dx.doi.org/10.3390/nano9030447.

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Nanorods based on ZnO for surface enhanced Raman spectroscopy are promising for the non-invasive and rapid detection of biomarkers and diagnosis of disease. However, optimization of nanorod and coating parameters is essential to their practical application. With the goal of establishing a baseline for early detection in biological applications, gold-coated ZnO nanorods were grown and coated to form porous structures. Prior to gold deposition, the grown nanorods were 30–50 nm in diameter and 500–600 nm in length. Gold coatings were grown on the nanorod structure to a series of thicknesses between 100 and 300 nm. A gold coating of 200 nm was found to optimize the Rhodamine B model analyte signal, while performance for rat urine depended on the biomarkers to be detected. These results establish design guidelines for future use of Au-ZnO nanorods in the study and early diagnosis of inflammatory diseases.

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Steimle, Benjamin C., Julie L. Fenton, and Raymond E. Schaak. "Rational construction of a scalable heterostructured nanorod megalibrary." Science 367, no. 6476 (January 23, 2020): 418–24. http://dx.doi.org/10.1126/science.aaz1172.

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Integrating multiple materials in arbitrary arrangements within nanoparticles is a prerequisite for advancing many applications. Strategies to synthesize heterostructured nanoparticles are emerging, but they are limited in complexity, scope, and scalability. We introduce two design guidelines, based on interfacial reactivity and crystal structure relations, that enable the rational synthesis of a heterostructured nanorod megalibrary. We define synthetically feasible pathways to 65,520 distinct multicomponent metal sulfide nanorods having as many as 6 materials, 8 segments, and 11 internal interfaces by applying up to seven sequential cation-exchange reactions to copper sulfide nanorod precursors. We experimentally observe 113 individual heterostructured nanorods and demonstrate the scalable production of three samples. Previously unimaginable complexity in heterostructured nanorods is now routinely achievable with simple benchtop chemistry and standard laboratory glassware.

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KIM, HYUNSU, SUNGHOON PARK, CHANGHYUN JIN, and CHONGMU LEE. "ENHANCED GAS SENSING PROPERTIES OF p-TYPE TeO2 NANORODS FUNCTIONALIZED WITH Pd." Nano 06, no. 05 (October 2011): 455–60. http://dx.doi.org/10.1142/s1793292011002858.

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TeO2 nanorods functionalized with Pd were prepared by a three-step process comprising thermal evaporation of Te powders, Pd deposition by photo-reduction, and annealing. Sensors were fabricated by using the Pd -functionalized TeO2 nanorods. Scanning electron microscopy images exhibited that the nanorods with diameters in a range of 50–100 nm and lengths of a few micrometers were covered with the Pd nanoparticles with an average diameter of ~ 15 nm. Transmission electron microscopy and X-ray diffraction analysis revealed that the nanorods were monocrystalline simple tetragonal TeO2 . On the other hand, the nanoparticles on them were confirmed to be nanocrystalline face-centered cubic Pd . The multiple-networked TeO2 nanorod sensors exhibited a sensitivity of 3.13% at 100 ppm NO2 at 300°C, whereas the Pd -functionalized TeO2 nanorod sensors exhibited a sensitivity of 11.97% under the same condition. The recovery time of TeO2 nanorods was decreased considerably at every NO2 concentration by the Pd -functionalization even if the response time decreased or increased slightly depending upon the NO2 concentration. In addition, the origin of the enhancement of the sensing properties of the TeO2 nanorods by functionalization with Pd is discussed.

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Journal articles on the topic 'Nanorose'

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