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Artykuły w czasopismach na temat „Photoluminescence - Nanostructures”

Autor: Grafiati

Data publikacji: 7 września 2023

Data aktualizacji: 31 lipca 2025

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1

Zhang, Shiying, Huizhao Zhuang, Chengshan Xue та Baoli Li. "Effect of Annealing on Morphology and Photoluminescence of β-Ga2O3 Nanostructures". Journal of Nanoscience and Nanotechnology 8, № 7 (2008): 3454–57. http://dx.doi.org/10.1166/jnn.2008.138.

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A novel method was applied to prepare one-dimensional β-Ga2O3 nanostructure films. In this method, β-Ga2O3 nanostructures have been successfully synthesized on Si(111) substrates through annealing sputtered Ga2O3/Mo films for differernt time under flowing ammonia. The as-synthesized β-Ga2O3 nanostructures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL) spectrum. The results show that the formed nanostructures are single-crystalline Ga2O3 with monoclinic structure. The annealing time of the samples has an evident influence on the morp

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2

Gong, Jiang Feng, Wei Hua Zhu, Kai Xiao Zhang, Ming Yi Liu, and Hai Yan Xie. "Synthesis Aligned ZnS Nanocone and its Photoluminescence." Advanced Materials Research 295-297 (July 2011): 610–13. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.610.

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We report the synthesis and characterization of ZnS nanostructures, which were grown by thermal evaporation of the ZnS powder at high temperature using iron network as the collection substrate. Scanning electron microscopy investigations show that the products present taper-like morphologies. Transmission electron microscopy studies indicate ZnS nanostructures are well crystallized. The formation mechanism of the novel nanostructure is discussed on the basis of the experimental results; The nanostructure is formed due to a fast growth of ZnS nanowire along [0001] and the subsequent “epitaxial”

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3

Botsoa, Jacques, Jean Marie Bluet, Vladimir Lysenko, Olivier Marty, Daniel Barbier, and Gérard Guillot. "Photoluminescence of 6H-SiC Nanostructures." Materials Science Forum 556-557 (September 2007): 407–10. http://dx.doi.org/10.4028/www.scientific.net/msf.556-557.407.

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Photoluminescence properties of a freestanding nanoporous SiC layer obtained from bulk 6H-SiC substrate as well as SiC nanopowder consisting of numerous separated nanoparticles has been investigated. The nanoporous SiC layer is obtained by UV radiation assisted electrochemical etching of the 6H-SiC wafer and the SiC nanopowder is formed by mechanical grinding of the nanoporous SiC free layer. A comparison of low temperature PL spectra of the SiC nanostructures and initial SiC bulk substrate has been performed. The evolution of PL spectra of the SiC nanostructures with respect to their surface

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4

Husairi, F. S., K. Eswar, Z. N. Atikah, A. Azlinda, M. Rusop, and S. Abdullah. "The Fabrication of PSi/ZnO Nanostructures as Chemical Sensors for the Detection of Ethanol in Solution Using an Electrochemical Impedance Technique." Applied Mechanics and Materials 773-774 (July 2015): 642–46. http://dx.doi.org/10.4028/www.scientific.net/amm.773-774.642.

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In this work, porous silicon (PSi) was prepared by electrochemical etching and used as a template for ZnO nanostructures. ZnO nanostructures were grown using the catalytic immersion method at different molar ratio concentrations of the precursor and stabilizer. The ZnO nanostructures were analyzed using FESEM and photoluminescence (PL) spectrometry, before tested with ethanol solution. The population of the ZnO nanostructures on PSi increased with the concentration and followed the surface morphology of PSi. The photoluminescence spectra of ZnO show two dominant peaks in the UV and visible reg

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5

Скурлов, И. Д., П. С. Парфёнов, А. В. Соколова та ін. "Фотоиндуцированный перенос заряда в слоистых 2D наноструктурах PbSe-MoS-=SUB=-2-=/SUB=-". Оптика и спектроскопия 130, № 2 (2022): 325. http://dx.doi.org/10.21883/os.2022.02.52003.2773-21.

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Semiconductor 2D nanostructures are a new platform for the creation of modern optoelectronic devices. Layered 2D PbSe-MoS2 nanostructures with efficient photoinduced charge transfer from PbSe nanoplatelets (NPLs) to MoS2 were created. When PbSe NPLs with short organic ligands are deposited onto a thin layer of MoS2 NPLs, a decrease in their photoluminescence intensity and a decrease in the average photoluminescence lifetime are observed. When a layered 2D PbSe-MoS2 nanostructure is illuminated with IR radiation, a photocurrent appears, which indicates the contribution of PbSe NPLs to the elect

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6

Husairi, F. S., Syahirah Mhd Ali, A. Azlinda, M. Rusop, and S. Abdullah. "Special Effect of Urea as a Stabilizer in Thermal Immersion Method to Synthesis Porous Zinc Oxide Nanostructures." Journal of Nanomaterials 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/163527.

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ZnO nanostructure was prepared by catalytic immersion method (90°C) with zinc nitrate hexahydrate (Zn(NO3)26H2O) as a precursors and urea (CH4N2O) as a stabilizer. Different molarity concentration ratio of Zn(NO3)26H2O to CH4N2O, 2 : 1, 1 : 4, 1 : 6, and 1 : 8 is used in this work. The effect of urea concentration used during the synthesis process is discussed. The ZnO nanostructures were characterized by using field emission scanning electron microscope (FESEM), photoluminescene (PL), andI-Vprobe. Porous nanoflakes are successfully synthesized on p-type silicon substrate coated with gold laye

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7

Jalolov, R. R., B. N. Rustamova, Sh Z. Urolov, and Z. Sh Shaymardanov. "The influence of size on the photoluminescence properties of ZnO nanostructures." «Узбекский физический журнал» 23, no. 2 (2021): 40–44. http://dx.doi.org/10.52304/.v23i2.238.

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This paper describes methods for synthesizing different nanostructures of ZnO in aqueous solutions at low temperatures and examines the effect of the size of the synthesized samples on the photoluminescence (PL) spectra. As the diameters of the nanostructures increased, a decrease in the ratio of the intensity of the ultraviolet radiation band to the intensity of the yellow radiation band in the PL spectrum observed. It is found that changing the diameters of nanostructures from 15 nm to 1000 nm leads to a decrease in their bandgap energy (Eg) from 3.28 to 3.21 eV. When the diameters of the na

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8

Skurlov I. D., Parfenov P. S., Sokolova A. V., et al. "Photoinduced charge transfer in layered 2D PbSe-MoS-=SUB=-2-=/SUB=- nanostructures." Optics and Spectroscopy 132, no. 2 (2022): 298. http://dx.doi.org/10.21883/eos.2022.02.53226.2773-21.

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Semiconductor 2D nanostructures are a new platform for the creation of modern optoelectronic devices. Layered 2D PbSe-MoS2 nanostructures with efficient photoinduced charge transfer from PbSe nanoplatelets (NPLs) to MoS2 were created. When PbSe NPLs with short organic ligands are deposited onto a thin layer of MoS2 NPLs, a decrease in their photoluminescence intensity and a decrease in the average photoluminescence lifetime are observed. When a layered 2D PbSe-MoS2 nanostructure is illuminated with IR radiation, a photocurrent appears, which indicates the contribution of PbSe NPLs to the elect

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9

Liu, Yichun, and Yanhong Tong. "Growth and Optical Properties of ZnO Low-Dimensional Nanostructures." Journal of Nanoscience and Nanotechnology 8, no. 3 (2008): 1101–9. http://dx.doi.org/10.1166/jnn.2008.18158.

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Recent studies on the growth of ZnO nanostructures and their optical properties were reviewed. Using different methods, a variety of ZnO nanostructures, including quantum dots nanotowers, nanotubes, nanorods, nanowires, and nanosheets, displaying zero, one, and two dimensions, have been synthesized. The growth of ZnO low-dimensional nanostructures has been demonstrated. Their optical properties have been studied by means of room-temperature photoluminescence spectra, low-temperature photoluminescence spectra, temperature-dependent photoluminescence spectra, and pressure-dependent photoluminesc

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10

Galdámez-Martinez, Andres, Guillermo Santana, Frank Güell, Paulina R. Martínez-Alanis, and Ateet Dutt. "Photoluminescence of ZnO Nanowires: A Review." Nanomaterials 10, no. 5 (2020): 857. http://dx.doi.org/10.3390/nano10050857.

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One-dimensional ZnO nanostructures (nanowires/nanorods) are attractive materials for applications such as gas sensors, biosensors, solar cells, and photocatalysts. This is due to the relatively easy production process of these kinds of nanostructures with excellent charge carrier transport properties and high crystalline quality. In this work, we review the photoluminescence (PL) properties of single and collective ZnO nanowires and nanorods. As different growth techniques were obtained for the presented samples, a brief review of two popular growth methods, vapor-liquid-solid (VLS) and hydrot

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11

Wang, S. L., H. W. Zhu, W. H. Tang, and P. G. Li. "Propeller-Shaped ZnO Nanostructures Obtained by Chemical Vapor Deposition: Photoluminescence and Photocatalytic Properties." Journal of Nanomaterials 2012 (2012): 1–5. http://dx.doi.org/10.1155/2012/594290.

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Propeller-shaped and flower-shaped ZnO nanostructures on Si substrates were prepared by a one-step chemical vapor deposition technique. The propeller-shaped ZnO nanostructure consists of a set of axial nanorod (50 nm in tip, 80 nm in root and 1 μm in length), surrounded by radial-oriented nanoribbons (20–30 nm in thickness and 1.5 μm in length). The morphology of flower-shaped ZnO nanostructure is similar to that of propeller-shaped ZnO, except the shape of leaves. These nanorods leaves (30 nm in diameter and 1–1.5 μm in length) are aligned in a radial way and pointed toward a common center. T

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12

Zhang, Baohua, Fuqiang Guo, and Wei Wang. "Synthesis and Characterization of ZnTe Hierarchical Nanostructures." Journal of Nanomaterials 2012 (2012): 1–5. http://dx.doi.org/10.1155/2012/293041.

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Single-crystalline ZnTe hierarchical nanostructures have been successfully synthesized by a simple thermal evaporation technology. The as-prepared products were characterized with X-ray diffraction (XRD), scanning electron microcopy (SEM), transmission electron microscope (TEM), and photoluminescence spectrum (PL). These results showed that the ZnTe hierarchical nanostructures consisted of nanowires and nanolumps. The room temperature PL spectrum exhibited a pure green luminescence centered at 545nm. The growth mechanism of hierarchical nanostructure was also discussed.

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13

Mamat, Mohamad Hafiz, Zuraida Khusaimi, and Mohamad Mahmood Rusop. "Growth of Multi-Shaped Zinc Oxide Nanostructures Using C-Axis Oriented Zinc Oxide Thin Film as a Seeded Catalyst via Hydrothermal Aqueous Chemical Growth Method." Defect and Diffusion Forum 312-315 (April 2011): 1126–31. http://dx.doi.org/10.4028/www.scientific.net/ddf.312-315.1126.

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Zinc oxide (ZnO) nanostructures with different kind of morphologies were synthesized on glass substrates via the hydrothermal aqueous chemical growth method utilizing c-axis oriented ZnO thin film as seeded catalyst. By preparing ZnO thin film at different molar concentrations between 0.2~1.0 M, oval shaped ZnO nanostructures mixed with ZnO nanowires and rod shaped ZnO nanostructures mixed with ZnO nanowires were produced after immersion process into 0.0002 M zinc nitrate solution for 24 hour. The XRD spectra show synthesized ZnO nanostructures were ZnO hexagonal wurtzite crystalline. The phot

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14

Rauwel, Protima, Martin Salumaa, Andres Aasna, Augustinas Galeckas, and Erwan Rauwel. "A Review of the Synthesis and Photoluminescence Properties of Hybrid ZnO and Carbon Nanomaterials." Journal of Nanomaterials 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/5320625.

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Photoluminescent ZnO carbon nanomaterials are an emerging class of nanomaterials with unique optical properties. They each, ZnO and carbon nanomaterials, have an advantage of being nontoxic and environmentally friendly. Their cost-effective production methods along with simple synthesis routes are also of interest. Moreover, ZnO presents photoluminescence emission in the UV and visible region depending on the synthesis routes, shape, size, deep level, and surface defects. When combined with carbon nanomaterials, modification of surface defects in ZnO allows tuning of these photoluminescence pr

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15

Green, Joshua M., Juno Lawrance, and Jun Jiao. "Controlled Fabrication of High-Yield CdS Nanostructures by Compartment Arrangement." Journal of Nanomaterials 2008 (2008): 1–4. http://dx.doi.org/10.1155/2008/107943.

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High-yield, high-purity CdS nanostructures were synthesized in a turf-like configuration using an improved vapor-liquid-solid method. To increase the yield, a compartment arrangement was employed. The specific kind of nanostructure fabricated was found to be directly dependent on the temperature in the compartment. Along with the high-yield growth of CdS nanorods, nanowires, and nanobelts, intertwined structures were also observed, and the electron field emission property of the intertwined structures was investigated and compared with that of other type of nanostructures. Photoluminescence me

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16

Mohd Bakhori, Siti Khadijah, Chuo Ann Ling, and Shahrom Mahmud. "Photoluminescence and Raman Studies of Annealed ZnO Nanostructures." Advanced Materials Research 501 (April 2012): 179–83. http://dx.doi.org/10.4028/www.scientific.net/amr.501.179.

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The influence of annealing on the optical properties of as-grown ZnO nanostructures prepared in pellets has been investigated by photoluminescence (PL) and Raman spectroscopy. The annealing temperatures of ZnO nanostructure at 600°C, 650°C and 700 °C were conducted in oxygen (O2) and nitrogen (N2) ambient. The near band edge emission (NBE) of samples recorded in the PL spectra demonstrates significant changes on optical signal whereby the NBE is redshifted after O2 annealed and became slightly higher in N2 annealed. Apart from that, weak green luminescence (GL) namely deep band emission (DBE)

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17

Alemu, Gurmessa, Melese Getnet, Veerayya Choudary Lingamaneni, and Shewamare Sisay. "Photoluminescence from GaAs nanostructures." International Journal of Physical Sciences 10, no. 3 (2015): 106–11. http://dx.doi.org/10.5897/ijps2014.4245.

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18

Kiruba, R., and Solomon Jeevaraj A. Kingson. "Synthesis and Spectral Analysis of PVP Capped Zinc Oxide Nanostructures." Advanced Materials Research 1086 (February 2015): 75–78. http://dx.doi.org/10.4028/www.scientific.net/amr.1086.75.

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Monodispersed polyvinylpyrrolidone capped nanostructures of zinc oxide are prepared through chemical precipitation technique. The prepared nanostructures are characterized by XRD, SEM and Photoluminescence spectroscopic techniques. X-ray diffraction studies confirm the hexagonal structure of zinc oxide nanostructures. Nanostructures of the prepared zinc oxide are confirmed by SEM. The emission wavelength of PVP capped zinc oxide is found to be 551 nm using photoluminescence spectra.

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19

Gridchin V. O., Soshnikov I. P., Reznik R. R., et al. "Effect of Nitrogen Plasma Treatment on the Structural and Optical Properties of InGaN." Technical Physics Letters 49, no. 3 (2023): 27. http://dx.doi.org/10.21883/tpl.2023.03.55679.19452.

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The effect of cooling conditions in the plasma-assisted molecular-beam epitaxy growth on the structural and optical properties of InGaN nanostructures is studied. It is shown that cooling of the samples without nitrogen plasma contributes to the suppression of phase separation in InGaN nanostructures. The integrated intensity of photoluminescence from these nanostructures increased by a factor of 2. Keywords: InGaN, silicon, nanostructures, photoluminescence, structural properties, optical properties, molecular beam epitaxy, nitrogen plasma.

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20

Choy, W. C. H., C. F. Guo, K. H. Pang, and Y. P. Leung. "CVD Grown Zinc Based Nanostructures on Zinc Selenide Microscale Grains." Solid State Phenomena 121-123 (March 2007): 347–50. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.347.

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With a suitable growth condition using CVD method, single crystal ZnO nanorods grow on the well-defined bounded facets of the random shape ZnSe grains using Zn and Se powders without any metal catalyst. To our best knowledge, there is no report in growing ZnO nanostructures on in-situ synthesized ZnSe. The growth direction of ZnSe nanorods on a facet of a ZnSe grain is quiet uniform. The growth mechanism of the nanostructure will be discussed. Meanwhile, the photoluminescence of the nanostructures will be investigated.

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21

PAL, U., N. MORALES-FLORES, and E. RUBIO-ROSAS. "Effect of Nb Doping on Morphology, Optical and Magnetic Behaviors of Ultrasonically Grown Zno Nanostructures." Material Science Research India 14, no. 2 (2017): 79–88. http://dx.doi.org/10.13005/msri/140201.

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ZnO nanostructures containing doped with different atom % of Nb are fabricated through ultrasound assisted hydrolysis in water. Effects of Nd incorporation on the structure, morphology, defect structure, optical, and magnetic behaviors of the nanostructures have been studied utilizing X-ray diffraction, scanning electron microscopy, photoluminescence spectroscopy and magnetometry. We demonstrate that while Nb incorporation in ZnO nanostructures drastically modify their morphology and crystallinity, it does not affect the band gap energy of of ZnO significantly. While Nb incorporation in small

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22

Michailovska, K. V. "Nickel-induced enhancement of photoluminescence in nc-Si-SiOx nanostructures." Semiconductor Physics Quantum Electronics and Optoelectronics 17, no. 4 (2014): 336–40. http://dx.doi.org/10.15407/spqeo17.04.336.

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23

Kumekov, S. E. "DIFFUSIVE SPECTRA OF ANTISTOKES WING OF PHOTOLUMINESCENCE OF CARBON NANOSTRUCTURES." Eurasian Physical Technical Journal 16, no. 1 (2019): 30–34. http://dx.doi.org/10.31489/2019no1/30-34.

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24

Eswar, Kevin Alvin, Husairi Fadzilah Shuhaimi, Muzammil Mat Akhir, et al. "Post-Annealing Temperature Effect on ZnO Nanostructures Growth on Porous Silicon." Advanced Materials Research 1109 (June 2015): 434–38. http://dx.doi.org/10.4028/www.scientific.net/amr.1109.434.

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In this study, ZnO nanostructures were synthesized on porous silicon (PSi) substrate using hydrothermal immersion method. Different post-annealing temperatures were varied from 300°C to 600°C. Surface morphology was studied by field emission scanning electron microscopy. It shows that a better shape was produce at annealing temperatures of 500°C. Structural studies of ZnO nanostructure were implemented using X-ray diffraction grating. The result shows post-annealing can influence the crystallinty of ZnO. Photoluminescence spectra were used to study the optical properties of ZnO nanostructure.

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25

Abdolrezapour, F., and M. Moradi. "High optical quality long ultrafine ZnO nanowires by low-temperature oxidation of sputtered nanostructured Zn templates." International Journal of Modern Physics B 32, no. 27 (2018): 1850297. http://dx.doi.org/10.1142/s0217979218502971.

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In this study, we show that by applying appropriate deposition conditions, Zn nanostructured templates for the growth of zinc oxide (ZnO) nanowires can be fabricated, from which ultrafine high optical quality nanowires can be grown by means of post-deposition low-temperature oxidation. By identifying and optimizing the appropriate parameters, we successfully fabricated long ultrafine ZnO nanowires up to 30 microns in length and 50 nm in diameter. Our report contradicts the commonly held paradigm that sputter deposition can only be used to fabricate thin films with no significant nanostructure

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26

Hernández, Erasto Vergara, Fabián Mendoza Hernández, Yeraldine Ameyalli Trigueros Pérez, and Gustavo Herrera Cortez. "Photoluminescence Study of Europium-Doped ZnO Nanostructures." Materials Science Forum 1141 (December 20, 2024): 103–8. https://doi.org/10.4028/p-btzq5l.

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Zinc oxide (ZnO) is a widely studied semiconductor material due to its unique physical and chemical properties. It is a promising candidate for various electronics, optoelectronics, and energy harvesting applications. Photoluminescence, the emission of light upon excitation by photons, is crucial in studying europium-doped zinc oxide (ZnO) nanostructures. The incorporation of europium, a lanthanide element, into the ZnO semiconductor matrix has garnered significant attention due to the remarkable optical characteristics of this combination. Various factors, including the crystallographic prope

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27

Wang, Chih-Chiang, Chia-Lun Lu, Fuh-Sheng Shieu, and Han C. Shih. "Structure and Photoluminescence Properties of Thermally Synthesized V2O5 and Al-Doped V2O5 Nanostructures." Materials 14, no. 2 (2021): 359. http://dx.doi.org/10.3390/ma14020359.

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Al-free and Al-doped V2O5 nanostructures were synthesized by a thermal-chemical vapor deposition (CVD) process on Si(100) at 850 °C under 1.2 × 10−1 Torr via a vapor-solid (V-S) mechanism. X-ray diffraction (XRD), Raman, and high-resolution transmission electron microscopy (HRTEM) confirmed a typical orthorhombic V2O5 with the growth direction along [110]-direction of both nanostructures. Metallic Al, rather than Al3+-ion, was detected by X-ray photoelectron spectroscopy (XPS), affected the V2O5 crystallinity. The photoluminescence intensity of V2O5 nanostructure at 1.77 and 1.94 eV decreased

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28

Abdellatif, Mohamed H., Marco Salerno, Gaser N. Abdelrasoul, et al. "Effect of Anderson localization on light emission from gold nanoparticle aggregates." Beilstein Journal of Nanotechnology 7 (December 16, 2016): 2013–22. http://dx.doi.org/10.3762/bjnano.7.192.

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The localization of light known as Anderson localization is a common phenomenon characterizing aggregates of metallic nanostructures. The electromagnetic energy of visible light can be localized inside nanostructures below the diffraction limit by converting the optical modes into nonradiative surface plasmon resonances. The energy of the confined photons is correlated to the size and shape of the nanostructured system. In this work, we studied the photoluminescence dependence of aggregates of 14 nm diameter gold nanoparticles (AuNPs) synthesized by drop-casting a liquid suspension on two diff

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29

Seyghalkar, Hamideh, Mohammad Sabet, and Masoud Salavati-Niasari. "Simple Thermal Decompose Method for Synthesis of Nickel Disulfide Nanostructures." High Temperature Materials and Processes 35, no. 10 (2016): 1017–19. http://dx.doi.org/10.1515/htmp-2015-0169.

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AbstractIn this work, a simple thermal decompose method was served to synthesize NiS2 nanostructures via a nickel complex. Also polyethylene glycol (PEG) was used as surfactant to increase the steric effect around nanostructure surfaces and decrease the particles size. The product was characterized with different analysis methods. The crystal structure of the product was studied by X-ray diffraction (XRD) pattern. The particle size and morphology were investigated by scanning electron microscopy (SEM). To study the nanostructures surface purity, Fourier transform infrared spectroscopy (FT-IR)

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30

WANG, PYINGHUA, XINGCHANG WANG, AIHUA WANG, BINGLIN ZHANG, YONGTIAO TIAN, and NING YAO. "SYNTHESIS AND OPTICAL PROPERTIES OF THE MULTILAYER STARLIKE ZnO NANOSTRUCTURES." International Journal of Modern Physics B 25, no. 08 (2011): 1143–48. http://dx.doi.org/10.1142/s0217979211058389.

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A novel multilayer starlike ZnO nanostructure has been successfully synthesized on a Si (111) substrate at 600°C by chemical vapor deposition using Zn and zinc acetate dihydrate as the source materials. The morphology, structure, and optical properties are investigated by field emission scanning electron microscopy, X-ray diffraction, Raman and photoluminescence (PL) spectrum, respectively. The results show that the multilayer starlike ZnO nanostructures have hexagonal wurtzite structure. The room-temperature PL spectrum shows the dominant green band peak and the weak UV peak. The possible gro

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31

Karar, N. "Photoluminescence from doped ZnS nanostructures." Solid State Communications 142, no. 5 (2007): 261–64. http://dx.doi.org/10.1016/j.ssc.2007.02.023.

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Empedocles, S. A., R. Neuhauser, K. Shimizu, and M. G. Bawendi. "Photoluminescence from Single Semiconductor Nanostructures." Advanced Materials 11, no. 15 (1999): 1243–56. http://dx.doi.org/10.1002/(sici)1521-4095(199910)11:15<1243::aid-adma1243>3.0.co;2-2.

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Ibrahim, Kejeen M., Wasan R. Saleh, and Abdulkareem M. A. Al-Sammarraie. "Structural and Optical Properties of ZnO Nanostructures Synthesized by Hydrothermal Method at Different Conditions." Nano Hybrids and Composites 35 (April 5, 2022): 75–83. http://dx.doi.org/10.4028/p-0w806z.

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ZnO nanostructures were synthesized by hydrothermal method at different temperatures and growth times. The effect of increasing the temperature on structural and optical properties of ZnO were analyzed and discussed. The prepared ZnO nanostructures were characterized by X-ray diffraction (XRD), UV–Vis. absorption spectroscopy (UV–Vis.), Photoluminescence (PL), and scanning electron microscopy (SEM). In this work, hexagonal crystal structure prepared ZnO nanostructures was observed using X-ray diffraction (XRD) and the average crystallite size equal 14.7 and 23.8 nm for samples synthesized at g

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Rajbongshi, Himanshu, and Dipjyoti Kalita. "Morphology-Dependent Photocatalytic Degradation of Organic Pollutant and Antibacterial Activity with CdS Nanostructures." Journal of Nanoscience and Nanotechnology 20, no. 9 (2020): 5885–95. http://dx.doi.org/10.1166/jnn.2020.18552.

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Efficient removal of organic pollutants from waste water by nanostructured photocatalysts has become an emerging research due to its importance in environmental remediation. Herein, CdS nanostructures with different morphologies i.e., spherical, nanopetal and rose-like have been synthesized by wet chemical method using TEA as a structure directing agent. The morphology, crystal structure, composition, surface area and optical properties of the nanostructures are investigated by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy dispersive X-ray spectroscopy (EDX), Brunauer-Emm

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Hernández, Erasto Vergara, César Eduardo Cea Montufar, Miguel Angel Cerro Ramírez, and Fabián Mendoza Hernández. "Photoluminescence of Erbium-Doped ZnO Nanostructures." Materials Science Forum 1112 (February 8, 2024): 139–44. http://dx.doi.org/10.4028/p-gw795b.

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The present work reviews the results of the photoluminescence study of erbium-doped ZnO nanostructures synthesized by physical and chemical methods. ZnO is a semiconductor compound composed of zinc and oxygen atoms. It possesses a wide bandgap (3.37 eV) and is optically and electrically active. When ZnO is synthesized in the form of nanostructures, such as nanoparticles, nanowires, nanorods, nanotubes, or nanosheets, it exhibits enhanced properties compared to its bulk counterpart due to quantum confinement effects and a high surface-to-volume ratio. By controlling different parameters in the

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Qin, Tian, Timothy Gutu, Jun Jiao, Chih-Hung Chang, and Gregory L. Rorrer. "Photoluminescence of Silica Nanostructures from Bioreactor Culture of Marine Diatom Nitzschia frustulum." Journal of Nanoscience and Nanotechnology 8, no. 5 (2008): 2392–98. http://dx.doi.org/10.1166/jnn.2008.241.

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The marine diatom Nitzschia frustulum is a single-celled photosynthetic organism that uses soluble silicon as the substrate to fabricate intricately patterned silica shells called frustules consisting of 200 nm diameter pores in a rectangular array. Controlled photobioreactor cultivation of the N. frustulum cell suspension to silicon starvation induced changes in the nanostructure of the diatom frustule, which in turn imparted blue photoluminescence (PL) to the frustule biosilica. The photoluminescent properties were imbedded within a patterned substrate precisely ordered at the nano, submicro

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Skobeeva, V. M., V. A. Smyntyna, M. I. Kiose, and N. V. Malushin. "INCREASING THE PHOTOLUMINESCENCE EFFICIENCY OF CdS NC GROWN IN A GELATINOUS ENVIRONMENT." Sensor Electronics and Microsystem Technologies 18, no. 1 (2021): 10–19. http://dx.doi.org/10.18524/1815-7459.2021.1.227406.

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The optical and luminescent properties of nanostructures of CdS / ZnS QDs and CdS QDs doped with lithium, obtained by the sol-gel technology in an aqueous solution of gelatin, have been studied. It was determined from the optical absorption spectra of the CdS / ZnS QD nanostructures that the thickness of the shell layer corresponds to the thickness of one ZnS monolayer. The luminescence spectra revealed a significant increase in the intensity of luminescence nanostructure. The absorption spectra of undoped and doped CdS NCs coincide, which indicates that there is no change in the NC size and t

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Chen, Cheng-Ying, Ming-Wei Chen, Jr-Jian Ke, Chin-An Lin, José R. D. Retamal, and Jr-Hau He. "Surface effects on optical and electrical properties of ZnO nanostructures." Pure and Applied Chemistry 82, no. 11 (2010): 2055–73. http://dx.doi.org/10.1351/pac-con-09-12-05.

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This article presents a comprehensive review of the current research addressing the surface effects on physical properties and potential applications of nanostructured ZnO. Studies illustrating the transport, photoluminescence (PL), and photoconductivity properties of ZnO with ultrahigh surface-to-volume (S/V) ratio are reviewed first. Secondly, we examine recent studies of the applications of nanostructured ZnO employing the surface effect on gas/chemical sensing, relying on a change of conductivity via electron trapping and detrapping process at the surfaces of nanostructures. Finally, we co

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Bakhsh, Allah, Iftikhar Hussain Gul, Ashari Maqsood, Shang Hsuan Wu, Ching Hsiang Chan, and Yia Chung Chang. "Effect of High Substrate Temperature on Morphology, Structural and Optical Properties of CdZnS Nanostructures." Materials Science Forum 886 (March 2017): 24–31. http://dx.doi.org/10.4028/www.scientific.net/msf.886.24.

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One-dimensional CdZnS nanostructures have been synthesized through the sublimation. Effect of high substrate temperature on morphology, structural and optical properties of these nanostructures has been studied. X-Ray diffraction peak intensity, lattice parameters, crystallite size decreased with an increase in substrate temperature. The morphology changed with the increase in the substrate temperature. Raman Spectroscopy confirmed the existence of constituent elements in CdZnS solid solution and an increase of Zn concentration with the rise in substrate temperature. The nanostructures exhibit

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Wang, Yan Tao, and Rui Li. "Control on the Photoluminescence of ZnO Nanostructures Synthesized by a Reverse Micellar Route." Advanced Materials Research 621 (December 2012): 153–56. http://dx.doi.org/10.4028/www.scientific.net/amr.621.153.

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ZnO nanostructures with controlable properties were synthesized by a reverse micellar system. The morphology and photoluminescence of ZnO nanostructures can be controlled by changing the the ratio of reaction Zn(NO3)2 and MEA. As the ratio of MEA/ Zn(NO3)2 is low, ZnO nanodots were generated with strong blue emission; as the ratio of MEA/ Zn(NO3)2 is increased, the formation of ZnO nanorods with green emission were synthesized. Since the photoluminescence (PL) properties could be adjusted by varying the nanostructures, these ZnO materials have high potential on different applications, for inst

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Yang, Yang, Ruhao Pan, Shibing Tian, Changzhi Gu, and Junjie Li. "Plasmonic Hybrids of MoS2 and 10-nm Nanogap Arrays for Photoluminescence Enhancement." Micromachines 11, no. 12 (2020): 1109. http://dx.doi.org/10.3390/mi11121109.

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Monolayer MoS2 has attracted tremendous interest, in recent years, due to its novel physical properties and applications in optoelectronic and photonic devices. However, the nature of the atomic-thin thickness of monolayer MoS2 limits its optical absorption and emission, thereby hindering its optoelectronic applications. Hybridizing MoS2 by plasmonic nanostructures is a critical route to enhance its photoluminescence. In this work, the hybrid nanostructure has been proposed by transferring the monolayer MoS2 onto the surface of 10-nm-wide gold nanogap arrays fabricated using the shadow deposit

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MEDINA, Rajie A., Michael E. FRANCO, Lyn Marie DE JUAN-CORPUZ, and Ryan D. CORPUZ. "Photoluminescent carbon nanodots for artificial photosynthesis." Journal of Metals, Materials and Minerals 34, no. 1 (2024): 1824. http://dx.doi.org/10.55713/jmmm.v34i1.1824.

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The emerging field of carbon dots (CDs), a type of carbon nanostructure that has gained significant attention due to its unique properties and potential applications. CDs possess remarkable attributes, including photoluminescence, electrochemical potential, compatibility with living organisms, solubility in water, chemical stability, and versatile surface properties. The chemical structure, particle size, and surface functionalities of CDs all have an impact on their photoluminescent properties, which are the focus of this review. The photoluminescence mechanism in CDs is discussed, highlighti

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Mohd Bakhori, Siti Khadijah, Chuo Ann Ling, and Shahrom Mahmud. "Effects of Annealing Treatment on Structural, Optical and Morphology Characteristics of ZnO Nanostructures." Advanced Materials Research 626 (December 2012): 967–70. http://dx.doi.org/10.4028/www.scientific.net/amr.626.967.

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The ZnO nanostructure produced by CFCO or French process were undergone annealing treatment at 700°C in oxygen and nitrogen ambient. Subsequently, the characteristics of structural, optical and morphology of ZnO nanostructures were investigated using X-ray diffraction (XRD), photoluminescence (PL) and transmission electron microscopy (TEM) respectively. The crystallite size of the nanostructures were calculated from full width half maximum (FWHM) of (101) peak in XRD patterns and the size is around 42 nm. PL measuremment were carried out and the near band edge emission (NBE) is increase in wav

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Slaber, N. M., and J. S. Kith. "Optical analysis of PVA/CdS nanostructure." Experimental and Theoretical NANOTECHNOLOGY 9, no. 1 (2025): 9–14. https://doi.org/10.56053/9.1.9.

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The optical properties of polyvinyl alcohol (PVA) matrix embedded with cadmium sulfide (CdS) nanostructures were investigated to understand their potential applications in optoelectronic devices. CdS nanoparticles were synthesized and uniformly dispersed within the PVA matrix using a solution-casting method. The structural and morphological characterization confirmed the formation of well-dispersed CdS nanostructures within the polymer matrix. UV-vis spectroscopy analysis revealed a significant blue shift in the absorption edge due to the quantum confinement effect of CdS nanoparticles. Photol

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Cao, Feng, Jianmin Wang, Wanhong Tu, Xin Lv, Song Li, and Gaowu Qin. "Uniform Bi2O2CO3 hierarchical nanoflowers: solvothermal synthesis and photocatalytic properties." Functional Materials Letters 08, no. 02 (2015): 1550021. http://dx.doi.org/10.1142/s1793604715500216.

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Well-defined flowerlike Bi 2 O 2 CO 3 nanostructures were fabricated by a simple one-pot solvothermal method with high yield. The products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy, transmission electron microscopy, nitrogen sorption, photoluminescence spectra and UV–visible diffuse reflectance spectroscopy. The photocatalytic properties of the as-prepared samples were further investigated by photocatalytic decomposition of Rhodamine B (RhB) dye, and it was found that the Bi 2 O 2 CO 3 nanoflowers showed a good photocatalytic activity under UV l

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Kim, Dokyoung, Barry Arkles, Michael Sailor, Youlin Pan, and Zuidema. "Facile Surface Modification of Hydroxylated Silicon Nanostructures Utilizing Heterocyclic Silanes." Journal of the American Chemical Society 138, no. 46 (2016): 15106–9. https://doi.org/10.1021/jacs.6b08614.

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Heterocyclic silanes containing Si−N or Si−S bonds in the ring undergo a ring opening reaction with −OH groups at the surface of porous Si nanostructures to generate −SH or −NH functional surfaces, grafted via O−Si bonds. The reaction is substantially faster (0.5−2 h at 25 °C) and more efficient than hydrolytic condensation of trialkoxysilanes on similar hydroxy-terminated surfaces, and the reaction retains the open pore structure and photoluminescence of the quantum-confined silicon nanostructures. The chemistry is sufficiently

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Chou, Han-Sheng, Kai-Di Yang, Sheng-Hong Xiao, et al. "Temperature-dependent ultraviolet photoluminescence in hierarchical Zn, ZnO and ZnO/Zn nanostructures." Nanoscale 11, no. 28 (2019): 13385–96. http://dx.doi.org/10.1039/c9nr05235f.

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The temperature-dependent effects on the ultraviolet photoluminescence enhancement, blueshift, thermal quenching of the two-dimensional Zn nanosheets, 2D-hierarchical ZnO nanostructures, and 2D-hierarchical ZnO/Zn nanostructures are presented.

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Millán, Brenda Carolina Pérez, César Eduardo Cea Montufar, Fabián Mendoza Hernández, and Erasto Vergara Hernández. "Photoluminescence of Silver-Doped ZnO Nanostructures." Key Engineering Materials 945 (May 19, 2023): 11–16. http://dx.doi.org/10.4028/p-64j9qy.

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The present work reviews the results of the photoluminescence (PL) study of silver-doped ZnO nanostructures synthesized by both physical and chemical methods. ZnO is a semiconductor with a binding energy of 60 meV, which ensures efficient near-band-edge band emission at a temperature of 300K and ultraviolet emission of bulk ZnO, and ZnO has a bandgap energy of 3.37 eV at room temperature. By tuning the growth process parameters of silver-doped ZnO nanostructures, the optical properties of ZnO can be controlled for use in various optoelectronic components, biosensors, blue-emitting diodes, and

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Li, C. P., L. Guo, Z. Y. Wu, et al. "Photoluminescence and time-resolved photoluminescence of star-shaped ZnO nanostructures." Solid State Communications 139, no. 7 (2006): 355–59. http://dx.doi.org/10.1016/j.ssc.2006.06.029.

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Shah, Rushil, Abhijit Saha, Zahraa Najah, et al. "Role of Quantum Dots and Nanostructures in Photovoltaic Energy Conversion." E3S Web of Conferences 552 (2024): 01096. http://dx.doi.org/10.1051/e3sconf/202455201096.

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Nanostructures and quantum dots have substantial effects on enhancing photovoltaic energy conversion efficiency, as evidenced in this comprehensive study. Materials that are nanostructured and nanosized particles are commonly used to address the urgent issues related to energy conversion. The use of nanostructured substances to address issues with energy and natural resources has garnered a lot of interest lately. Directional nanostructures in particular show promise for the conversion, collection, and storage of energy. Due to their unique properties, such as electrical conductivity, mechanic

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