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Journal articles on the topic 'Infrared nanocrystals'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Della Gaspera, Enrico, Noel W. Duffy, Joel van Embden, et al. "Plasmonic Ge-doped ZnO nanocrystals." Chemical Communications 51, no. 62 (2015): 12369–72. http://dx.doi.org/10.1039/c5cc02429c.

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SHUBERT, V. ALVIN, and STEVEN P. LEWIS. "SIZE-DEPENDENCE OF INFRARED SPECTRA IN NIOBIUM CARBIDE NANOCRYSTALS." International Journal of Modern Physics C 23, no. 08 (2012): 1240001. http://dx.doi.org/10.1142/s0129183112400013.

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Niobium carbide nanocrystals of ~1:1 stoichiometry have recently been observed for particle sizes ranging from Nb4C4 to Nb50C50 . Infrared (IR) spectroscopic measurements show that a new band of IR vibrational modes appears with increasing particle size at Nb9C9 . Using density-functional theory, we show that the vibrational modes in the new band involve structural features present only in nanocrystals with three or more atomic layers in every direction. The Nb9C9 nanocrystal is right at this structural threshold.

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Saez Cabezas, Camila A., Gary K. Ong, Ryan B. Jadrich, et al. "Gelation of plasmonic metal oxide nanocrystals by polymer-induced depletion attractions." Proceedings of the National Academy of Sciences 115, no. 36 (2018): 8925–30. http://dx.doi.org/10.1073/pnas.1806927115.

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Gelation of colloidal nanocrystals emerged as a strategy to preserve inherent nanoscale properties in multiscale architectures. However, available gelation methods to directly form self-supported nanocrystal networks struggle to reliably control nanoscale optical phenomena such as photoluminescence and localized surface plasmon resonance (LSPR) across nanocrystal systems due to processing variabilities. Here, we report on an alternative gelation method based on physical internanocrystal interactions: short-range depletion attractions balanced by long-range electrostatic repulsions. The latter

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4

Lhuillier, Emmanuel. "Narrow band gap nanocrystals for infrared cost-effective optoelectronics." Photoniques, no. 116 (2022): 54–57. http://dx.doi.org/10.1051/photon/202211654.

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Infrared optoelectronics is driven by epitaxially grown semiconductors and the introduction of alternative materials is often viewed with some suspicion until the newcomer has demonstrated a high degree of viability. Infrared nanocrystals have certainly reached this degree of maturity switching from the demonstration of absorption by chemists to their integration into increasingly complex systems. Here, we review some of the recent developments relative to the integration of nanocrystal devices in the 1-5 µm range.

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Li, Xinke, Fangtian You, Hongshang Peng, and Shihua Huang. "Synthesis and Near-Infrared Luminescent Properties of NaGdF4:Nd3+@NaGdF4 Core/Shell Nanocrystals with Different Shell Thickness." Journal of Nanoscience and Nanotechnology 16, no. 4 (2016): 3940–44. http://dx.doi.org/10.1166/jnn.2016.11818.

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The near-infrared to near-infrared (NIR-to-NIR) photoluminescence of nanocrystals has outstanding advantages in biological imaging. NaGdF4:Nd3+ core nanocrystals and NaGdF4:Nd3+@NaGdF4 core/shell nanocrystals with different shell thicknesses were synthesized by a simple solvothermal method. The obtained nanocrystals were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis. The phase of all nanocrystals is hexagonal. NaGdF4:Nd3+ core nanocrystals have an average size of 6 nm. By controlling core–shell ratio for 1:2 and 1:3, we obtained NaGdF4:Nd3+@NaGdF4

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Ницук, Ю. А., М. И. Киосе, Ю. Ф. Ваксман, В. А. Смынтына та И. Р. Яцунский. "Оптические свойства нанокристаллов CdS, легированных цинком и медью". Физика и техника полупроводников 53, № 3 (2019): 381. http://dx.doi.org/10.21883/ftp.2019.03.47291.8982.

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AbstractCadmium-sulfide nanocrystals are produced by the colloidal method. Doping with zinc and copper is conducted during nanocrystal growth. The optical absorption and photoluminescence spectra are studied. The maximum concentration of the optically active copper impurity is determined from a shift of the fundamental absorption edge to lower energies. It is shown that the long-wavelength luminescence of CdS and CdS:Zn nanocrystals is defined by optical transitions at donor–acceptor pairs. In CdS:Cu nanocrystals, optical absorption and photoluminescence in the visible spectral region are defi

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Zhang, Xinhai, Qiuling Chen, and Shouhua Zhang. "Ta2O5 Nanocrystals Strengthened Mechanical, Magnetic, and Radiation Shielding Properties of Heavy Metal Oxide Glass." Molecules 26, no. 15 (2021): 4494. http://dx.doi.org/10.3390/molecules26154494.

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In this study, for the first time, diamagnetic 5d0 Ta5+ ions and Ta2O5 nanocrystals were utilized to enhance the structural, mechanical, magnetic, and radiation shielding of heavy metal oxide glasses. Transparent Ta2O5 nanocrystal-doped heavy metal oxide glasses were obtained, and the embedded Ta2O5 nanocrystals had sizes ranging from 20 to 30 nm. The structural analysis of the Ta2O5 nanocrystal displays the transformation from hexagonal to orthorhombic Ta2O5. Structures of doped glasses were studied through X-ray diffraction and infrared and Raman spectra, which reveal that Ta2O5 exists in hi

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Chen, Yi Chuan, Yue Hui Hu, Xiao Hua Zhang, et al. "Structure and Properties of Doped ZnO Nanopowders Synthesized by Methanol Alcoholysis Method." Advanced Materials Research 287-290 (July 2011): 1406–11. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.1406.

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Pured ZnO, Al doped ZnO and Al-In co-doped ZnO nanopowders were synthesized by the methanol alcoholysis method at 130 °C. Structure, morphology and optical properties of ZnO nanopowders were characterized using X-ray diffraction, Transmission electron microscopy (TEM), Fourier transform infrared (FTIR) and Photoluminescence (PL) spectra. The results show that ZnO nanopowders can be obtained in methanol solution at low temperature (130 °C). TEM images show that Al doped ZnO nanocrystals grow along the [002] axis quicker than other axes. FTIR spectra show that ZnO nanocrystals synthesized by the

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Feng, Bin, Feng Teng, Ai-Wei Tang, Yan Wang, Yan-Bing Hou, and Yong-Sheng Wang. "Synthesis and Optical Properties of L-Cysteine Hydrochloride-Stabilized CdSe Nanocrystals in a New Alkali System." Journal of Nanoscience and Nanotechnology 8, no. 3 (2008): 1178–82. http://dx.doi.org/10.1166/jnn.2008.18168.

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Water-soluble CdSe nanocrystals were synthesized in a new alkali system at lower temperatures by using L-cysteine hydrochloride as a stabilizer and Na2SeSO3 as a selenium source to enable the synthesis of CdSe nanocrystals in a wider range of pHvalues. The CdSe nanocrystal powder was characterized by X-ray powder diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and transmission electron microscopy. We systematically investigated the effect of synthesis conditions on the optical properties of the L-cysteine hydrochloride-stabilized CdSe nanocrystals, and f

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Fermi, Andrea, Mirko Locritani, Gabriele Di Carlo, et al. "Light-harvesting antennae based on photoactive silicon nanocrystals functionalized with porphyrin chromophores." Faraday Discussions 185 (2015): 481–95. http://dx.doi.org/10.1039/c5fd00098j.

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Silicon nanocrystals functionalized with tetraphenylporphyrin Zn(ii) chromophores at the periphery perform as light harvesting antennae: excitation of the porphyrin units in the visible spectral region yields sensitized emission of the silicon nanocrystal core in the near infrared with a long lifetime (λ<sub>max</sub>= 905 nm,τ= 130 μs). This result demonstrates that this hybrid material has a potential application as a luminescent probe for bioimaging.

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Sun, Dong-Mei, Da-Zhang Zhu, and Qing-Sheng Wu. "Bi-template effect of a vegetal system on the synthesis of alkaline-earth tungstate nanocrystals." Journal of Materials Research 24, no. 2 (2009): 347–51. http://dx.doi.org/10.1557/jmr.2009.0072.

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The MBS (mung bean sprouts) vegetal system, with its high penetrability, high selectivity, and space restriction, was explored to control nanocrystal synthesis. We found that the inside and outside of MBS have different structures and ion transformation properties. Two nanocrystals with distinct morphology, the nanorod and the nanosphere, were grown on the outer surface and the inner stem wall of MBS, respectively. The two XWO4 (X = Ca,Sr,Ba) nanocrystals were characterized by scanning electron microscopy (SEM), x-ray diffraction (XRD), and Fourier transform infrared (FTIR). The FTIR spectra o

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Zhang, Yuqin, Shi He, Honghong Yao, et al. "Size Effect of Electrical and Optical Properties in Cr2+:ZnSe Nanowires." Nanomaterials 13, no. 2 (2023): 369. http://dx.doi.org/10.3390/nano13020369.

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Previous studies have shown that the nano-crystallization process has an appreciable impact on the luminescence properties of nanocrystals, which determines their defect state composition, size and morphology. This project aims to explore the influence of nanocrystal size on the electrical and optical properties of Cr2+:ZnSe nanowires. A first-principles study of Cr2+:ZnSe nanowires with different sizes was carried out at 0 K in the density functional framework. The Cr2+ ion was found to prefer to reside at the surface of ZnSe nanowires. As the size of the nanocrystals decreased, a considerabl

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Craievich, A. F., O. L. Alves, and L. C. Barbosa. "Formation and Growth of Semiconductor PbTe Nanocrystals in a Borosilicate Glass Matrix." Journal of Applied Crystallography 30, no. 5 (1997): 623–27. http://dx.doi.org/10.1107/s0021889897001799.

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Pb- and Te-doped borosilicate glasses are transformed by appropriate heat treatment into a composite material consisting of a vitreous matrix in which semiconductor PbTe nanocrystals are embedded. This composite exhibits interesting non-linear optical properties in the infrared region, in the range 10–20 000 Å. The shape and size distribution of the nanocrystals and the kinetics of their growth were studied by small-angle X-ray scattering (SAXS) during in situ isothermal treatment at 923 K. The experimental results indicate that nanocrystals are nearly spherical and have an average radius incr

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Bae, Hyoin, Hyeyeon Jung, Juna Lee, Dahye Shin, and Sungyeon Heo. "Development of Highly Transparent and Thermo-Shielding Flexible Film via Colloidal ITO Nanocrystals." Journal of Powder Materials 31, no. 6 (2024): 508–12. https://doi.org/10.4150/jpm.2024.00423.

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Infrared radiation accounts for approximately 50% of the solar spectrum. Specifically, the near-infrared (NIR) spectrum, ranging from 760 nm to 2500 nm, is primarily responsible for solar heat gain, increasing indoor temperatures and reducing heating and cooling efficiency. To address this issue, we developed a highly transparent thermo-shielding flexible film that maintains a high transmittance of the visible region (T = 80%) while reducing the transmittance of the NIR region (T ≈ 0%). NIR-absorbing indium tin oxide (ITO) nanocrystals were coated onto polyethylene terephthalate (PET) films, a

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Kang, Jiho, Zachary M. Sherman, Hannah S. N. Crory, et al. "Modular mixing in plasmonic metal oxide nanocrystal gels with thermoreversible links." Journal of Chemical Physics 158, no. 2 (2023): 024903. http://dx.doi.org/10.1063/5.0130817.

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Gelation offers a powerful strategy to assemble plasmonic nanocrystal networks incorporating both the distinctive optical properties of constituent building blocks and customizable collective properties. Beyond what a single-component assembly can offer, the characteristics of nanocrystal networks can be tuned in a broader range when two or more components are intimately combined. Here, we demonstrate mixed nanocrystal gel networks using thermoresponsive metal–terpyridine links that enable rapid gel assembly and disassembly with thermal cycling. Plasmonic indium oxide nanocrystals with differe

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Pardhi, Vishwas P., Tejesh Verma, S. J. S. Flora, Hardik Chandasana, and Rahul Shukla. "Nanocrystals: An Overview of Fabrication, Characterization and Therapeutic Applications in Drug Delivery." Current Pharmaceutical Design 24, no. 43 (2019): 5129–46. http://dx.doi.org/10.2174/1381612825666190215121148.

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Approximately 40 % drugs in the market are having poor aqueous solubility related problems and 70 % molecules in discovery pipeline are being practically insoluble in water. Nanocrystals is a prominent tool to solve the issue related to poor aqueous solubility and helps in improving the bioavailability of many drugs as reported in the literature. Nanocrystals can be prepared by top down methods, bottom up methods and combination methods. Many patented products such as Nanocrystals®, DissoCubes®, NANOEDGE® and SmartCrystals ®, etc., are available, which are based on these three preparation meth

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17

Marpongahtun, Darwin Yunus Nasution, Nami Panindia, and Vivi Purwandari. "Influence of Acetylated Cellulose Nanocrystal Incorporated into Poly(e-Caprolactone) Nanocomposites on Its Thermal, Mechanical, and Physicochemical Properties." Journal of Southwest Jiaotong University 56, no. 3 (2021): 274–83. http://dx.doi.org/10.35741/issn.0258-2724.56.3.23.

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Poly(e-caprolactone) are synthetic biodegradable polymers that can potentially be used as biocompatible materials for biological applications. The purpose of this work was to investigate the effect of acetylated cellulose nanocrystals isolated from corncob waste loaded into poly(e-caprolactone) matrix blend on its thermal, mechanical, morphology, and crystallinity. The acetylated cellulose nanocrystal filler with various concentrations (namely 5, 10, 15, and 20%) was mixed with poly(e-caprolactone) matrix prepared using reflux method under N2 gas flow at 120oC for 10 min. Subsequently, the sam

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Liang, Kai, Yajing Zhou, and Yali Ji. "Full biodegradable elastomeric nanocomposites fabricated by chitin nanocrystal and poly(caprolactone-diol citrate) elastomer." Journal of Bioactive and Compatible Polymers 34, no. 6 (2019): 453–63. http://dx.doi.org/10.1177/0883911519881728.

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Chitin nanocrystal is a biocompatible and biodegradable nanofiller, with great potential in enhancing the mechanical and biological properties of polymers. Poly(caprolactone-diol citrate) is a kind of citrate-based biodegradable elastomer prepared by an additive-free melt polycondensation of polycaprolactone-diol and citric acid coupled with subsequent thermocuring. Here, a facile casting/evaporation method was utilized to prepare full biodegradable poly(caprolactone-diol citrate)/chitin nanocrystal nanocomposites, and their structure and properties were characterized by Fourier transform infr

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ZHANG, WEI-FENG, QIAN XING, and YA-BIN HUANG. "MICROSTRUCTURES AND OPTICAL PROPERTIES OF STRONTIUM TITANATE NANOCRYSTALS PREPARED BY A STEARIC-ACID GEL PROCESS." Modern Physics Letters B 14, no. 19 (2000): 709–16. http://dx.doi.org/10.1142/s0217984900000896.

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SrTiO3 nanocrystals with grain sizes from 26 to 86 nm were prepared by stearic-acid gel method. The microstructures, lattice vibration and luminescence spectra were examined by X-ray diffraction, infrared, Raman and photoluminescence (PL) spectroscopies. Hydroxyl defects were clearly found by infrared spectroscopy in the SrTiO3 nanocrystals. Raman measurement results showed that internal stress exists in the SrTiO3 nanocrystals, which induces first-order Raman scattering processes. Strong visible PL near 2.62 eV was observed under 3.54 eV light excitation in small SrTiO3 nanocrystals. Grain-si

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Zulnazri, Zulnazri, Rozanna Dewi, Agam Muarif, et al. "Effect of Hydrochloric Acid Hydrolysis under Sonication and Hydrothermal Process to Produce Cellulose Nanocrystals from Oil Palm Empty Fruit Bunch (OPEFB)." Polymers 16, no. 13 (2024): 1866. http://dx.doi.org/10.3390/polym16131866.

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This paper presents an approach for hydrolyzing cellulose nanocrystals from oil palm empty fruit bunch (OPEFB) presented through hydrochloric acid hydrolysis under sonication–hydrothermal conditions. Differences in concentration, reaction time, and acid-to-cellulose ratio affect toward the yield, crystallinity, microstructure, and thermal stability were obtained. The highest yield of cellulose nanocrystals up to 74.82%, crystallinity up to 78.59%, and a maximum degradation temperature (Tmax) of 339.82 °C were achieved through hydrolysis using 3 M HCl at 110 °C during 1 h. X-ray diffraction ana

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Dong, Hehe, Yinggang Chen, Yan Jiao, et al. "Nanocrystalline Yb:YAG-Doped Silica Glass with Good Transmittance and Significant Spectral Performance Enhancements." Nanomaterials 12, no. 8 (2022): 1263. http://dx.doi.org/10.3390/nano12081263.

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In this study, Yb:YAG-nanocrystal-doped silica glass with high transmission and excellent spectral properties was successfully prepared using a modified sol–gel method. The X-ray diffraction (XRD), micro-Raman spectroscopy, electron paramagnetic resonance (EPR), transmission electron microscopy (TEM), and high-resolution TEM (HR-TEM) analyses confirmed that the Yb:YAG nanocrystals, with their low content, homogeneous distribution, and small crystal size, directly crystallized into the silica glass network without annealing treatment. In contrast with conventional microcrystalline glass having

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Tatarinov D. A., Sokolova A. V., Danilov D. V., and Litvin A. P. "Change of optical properties of inorganic perovskite nanocrystals of CsPbCl-=SUB=-x-=/SUB=-Br-=SUB=-3-x-=/SUB=-, alloyed with Yb-=SUP=-3+-=/SUP=- ions, when carrying out an anion exchange reaction." Optics and Spectroscopy 130, no. 8 (2022): 1034. http://dx.doi.org/10.21883/eos.2022.08.54778.2772-22.

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Alloying of perovskites nanocrystals by lanthanoids makes it possible to produce materials that luminesce effectively in both visible and near infrared spectra. In the present work, the influence of the width of the forbidden zone on the optical properties of the inorganic perovskites nanocrystals CsPbClxBr3-x alloyed by ions Yb3+ is investigated. For changing the chemical composition of nanocrystals, an anionic exchange method is used by adding bromide dodecyltrimethylammonium. As a result of the gradual substitution of chlorine ions with bromine ions, the forbidden area of nanocrystals is na

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Fronya, Anastasiya A., Sergey V. Antonenko, Alexander Yu Kharin, et al. "Tailoring Photoluminescence from Si-Based Nanocrystals Prepared by Pulsed Laser Ablation in He-N2 Gas Mixtures." Molecules 25, no. 3 (2020): 440. http://dx.doi.org/10.3390/molecules25030440.

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Using methods of pulsed laser ablation from a silicon target in helium (He)-nitrogen (N2) gas mixtures maintained at reduced pressures (0.5–5 Torr), we fabricated substrate-supported silicon (Si) nanocrystal-based films exhibiting a strong photoluminescence (PL) emission, which depended on the He/N2 ratio. We show that, in the case of ablation in pure He gas, Si nanocrystals exhibit PL bands centered in the “red - near infrared” (maximum at 760 nm) and “green” (centered at 550 nm) spectral regions, which can be attributed to quantum-confined excitonic states in small Si nanocrystals and to loc

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Rodina, Anna V. "Mid-infrared irradiation keeps nanocrystals bright." Nature Nanotechnology 16, no. 12 (2021): 1304–5. http://dx.doi.org/10.1038/s41565-021-01029-5.

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Nusir, Ahamd, Juan Aguilar, Justin Hill, Haley Morris, and M. Omar Manasreh. "Uncooled Infrared Photodetector Utilizing PbSe Nanocrystals." IEEE Transactions on Nanotechnology 15, no. 1 (2016): 109–12. http://dx.doi.org/10.1109/tnano.2015.2507058.

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Langevin, Marc-Antoine, Anna M. Ritcey, and Claudine Nì Allen. "Air-Stable Near-Infrared AgInSe2 Nanocrystals." ACS Nano 8, no. 4 (2014): 3476–82. http://dx.doi.org/10.1021/nn406439w.

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Mao, Baodong, Chi-Hung Chuang, Christopher McCleese, Junjie Zhu, and Clemens Burda. "Near-Infrared Emitting AgInS2/ZnS Nanocrystals." Journal of Physical Chemistry C 118, no. 25 (2014): 13883–89. http://dx.doi.org/10.1021/jp500872w.

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Koktysh, Dmitry S., Nikolai Gaponik, Martin Reufer, et al. "Near-Infrared Electroluminescence from HgTe Nanocrystals." ChemPhysChem 5, no. 9 (2004): 1435–38. http://dx.doi.org/10.1002/cphc.200400178.

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Ortac, Inanc, and Feride Severcan. "Spectroscopy of biological nanocrystals." Spectroscopy 21, no. 1 (2007): 31–41. http://dx.doi.org/10.1155/2007/129283.

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Nanocrystals have gained much interest in recent years, due to their unusual properties allowing interesting applications in physical and biological science. In this literature review, biological nanocrystals are discussed from the spectroscopic point of view. Firstly, the theory behind the outstanding abilities of the nanocrystals is described. Secondly, the spectroscopic properties of biological nanocrystals are mentioned. Lastly, the use of nanocrystals with various spectroscopic applications is reviewed such as biosensor applications with UV–visible and surface plasmon resonance and Raman

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Lesyuk, Rostyslav, Eugen Klein, Iryna Yaremchuk, and Christian Klinke. "Copper sulfide nanosheets with shape-tunable plasmonic properties in the NIR region." Nanoscale 10, no. 44 (2018): 20640–51. http://dx.doi.org/10.1039/c8nr06738d.

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2D copper sulfide nanocrystals are promising building blocks of plasmonic materials in the near-infrared (NIR) spectral region. The shape of synthesized 2D CuS nanocrystals can effectively tune the NIR absorption and field distribution within the particle.

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Wang, Baoyu, Rong Li, Jinhao Zeng, Min He, and Junrong Li. "Preparation of cellulose nanocrystals via successive periodate and bisulfite oxidation and mechanical and hydrophilic properties of the films." BioResources 16, no. 1 (2021): 1713–25. http://dx.doi.org/10.15376/biores.16.1.1713-1725.

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Microcrystalline cellulose was oxidized via periodate followed by sulfonation. The sulfonated cellulose nanocrystals were obtained through centrifugation, dialysis, and sonication. The sulfonated cellulose nanocrystals were rod-like and had an average length of 140 nm to 153 nm and an average width of 8 to 10 nm. The Fourier transform infrared profiles and polyelectrate titration demonstrated successful introduction of the sulfonated groups into the cellulose nanocrystals. The sulfonated cellulose nanocrystals had a higher crystallinity index than dialdehyde cellulose. The thin films fabricate

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Kim, Young Mi, Seok Ju Lee, and Ik Jin Kim. "Synthesis and Characterization of TMA-A Zeolite Nanocrystals." Solid State Phenomena 124-126 (June 2007): 563–66. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.563.

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Well-controlled cubic nanocrystal of TMA-A zeolite with a size of 60~100 nm were synthesized by a hydrothermal method in a solution having a Al(i-pro)3 : 2.2 TEOS : 2.4 TMAOH: 0.3 NaOH : 200H2O composition. The single TMA-A nanocrystals has an average lattice constant of 24.61 Å having a surface area of 742.36 m2/g. Thermal treatment of TMA zeolite crystals results in the formation of an amorphous above 900oC. Environmental scanning electron microscopy (ESEM). high resolution transmission electron microscopy(HRTEM), X-ray powder diffraction(XRD), fourier transform infrared(FT-IR) spectroscopy,

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Ting Fan, Ting Fan, Qinyuan Zhang Qinyuan Zhang, and Zhonghong Jiang Zhonghong Jiang. "Enhanced near infrared emission in water-soluble NdF3 nanocrystals by Ba2+ doping." Chinese Optics Letters 10, no. 2 (2012): 021602–21605. http://dx.doi.org/10.3788/col201210.021602.

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MAGALHÃES, WASHINGTON LUIZ ESTEVES, XIAODONG CAO, MAGALY ALEXANDRA RAMIRES, and LUCIAN A. LUCIA. "Novel all-cellulose composite displaying aligned cellulose nanofibers reinforced with cellulose nanocrystals." April 2011 10, no. 4 (2011): 19–25. http://dx.doi.org/10.32964/tj10.4.19.

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Aligned cellulose nanocrystals/cellulose coelectrospun nanofibers were successfully prepared by using a home-built coelectrospinning and collection system. Cellulose I was dissolved in N-methyl morpholine oxide at 120°C and diluted with dimethyl sulfoxide, which was used in the external concentric capillary needle as the sheath (shell) solution. A cellulose nanocrystal suspension obtained by sulfuric acid hydrolysis of cotton fibers was used as the core liquid in the internal concentric capillary needle after transferring from water to dimethyl sulfoxide. The resultant coelectrospun nanocompos

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B R, Venugopal. "Immobilization of Metal Sulfide Nanocrystals on Multiwalled Carbon Nanotubes Facilitated by Infrared Irradiation." Mapana - Journal of Sciences 13, no. 2 (2017): 17–32. http://dx.doi.org/10.12723/mjs.29.2.

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Uniformly distributed metal sulfide nanocrystals are immobilized on the surface of oxygenated multiwalled carbon nanotubes (MWCNTs) by reacting metal ions (Cu 2+ / Zn 2+ /Cd 2+ ) anchored to MWCNTs with hydrogen sulfide while irradiating with infrared (IR) radiation. The IR irradiation is the key step in the effective immobilization of metal sulfide nanocrystals on MWCNTs. The photoabsorption and photothermal properties of MWCNTs in the presence of IR irradiation raises the temperature of the CNTs in solution, facilitating the interaction between the acidic groups on CNTs and the metal ions, w

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Karamysheva, Sofia P., Sergei A. Cherevkov, Mikhail D. Miruschenko, Ivan A. Aleinik, Danila A. Tatarinov, and Elena V. Ushakova. "Spectral properties of Yb-doped AgBiS₂ and AgInS₂ nanocrystals." Journal of Optical Technology 91, no. 6 (2024): 370. http://dx.doi.org/10.1364/jot.91.000370.

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Subject of study. The spectral features of nanocrystals with ternary compositions I-V-VI2 and I-III-VI2 doped with the rare earth metal ytterbium are investigated and described. Purpose of the study. The aim of this work is to develop a novel synthesis method for these nanocrystals to further examine their optical and morphological properties. Method. The average sizes of AgInS2:Yb and AgBiS2:Yb nanocrystals are analyzed using atomic force microscopy and dynamic light scattering, and the results are compared. Spectrophotometry and spectrofluorimetry are employed to record the absorption and ph

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Sarwar, Abdur Rehman, Furqan Muhammad Iqbal, Muhammad Anjum Jamil, and Khizar Abbas. "Nanocrystals of Mangiferin Using Design Expert: Preparation, Characterization, and Pharmacokinetic Evaluation." Molecules 28, no. 15 (2023): 5918. http://dx.doi.org/10.3390/molecules28155918.

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Making nanoscale drug carriers could boost the bioavailability of medications that are slightly water soluble. One of the most promising approaches for enhancing the chemical stability and bioavailability of a variety of therapeutic medicines is liquid nanocrystal technology. This study aimed to prepare nanocrystals of mangiferin for sustained drug delivery and enhance the pharmacokinetic profile of the drug. The fractional factorial design (FFD) was used via a selection of independent and dependent variables. The selected factors were the concentration of mangiferin (A), hydroxypropyl methyl

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RUPASOV, VALERY I., and SERGEI G. KRIVOSHLYKOV. "LONG-WAVE INFRARED AND TERAHERTZ-FREQUENCY LASING BASED ON SEMICONDUCTOR NANOCRYSTALS." International Journal of High Speed Electronics and Systems 17, no. 02 (2007): 395–401. http://dx.doi.org/10.1142/s0129156407004588.

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ALTAIR Center develops long-wave infrared (LWIR) and terahertz-frequency (THz) lasers operating at room temperature employing intraband luminescence in colloidal semiconductor nanocrystals, in which the optical transition frequencies can be easily tuned to the desired values by an appropriate choice of the semiconductor material and radius of the nanocrystals.

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RUPASOV, VALERY I., and SERGEI G. KRIVOSHLYKOV. "LONG-WAVE INFRARED AND TERAHERTZ-FREQUENCY LASING BASED ON SEMICONDUCTOR NANOCRYSTALS." International Journal of High Speed Electronics and Systems 18, no. 01 (2008): 79–85. http://dx.doi.org/10.1142/s0129156408005151.

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ALTAIR Center develops long-wave infrared (LWIR) and terahertz-frequency (THz) lasers operating at room temperature employing intraband luminescence in colloidal semiconductor nanocrystals, in which the optical transition frequencies can be easily tuned to the desired values by an appropriate choice of the semiconductor material and radius of the nanocrystals.

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Tang, Ming Lee. "(Invited) Photon Upconversion: Getting Molecules and Nanocrystals to Talk Triplets." ECS Meeting Abstracts MA2024-01, no. 23 (2024): 1353. http://dx.doi.org/10.1149/ma2024-01231353mtgabs.

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Photon upconversion offers the prospect of combining low energy near-infrared radiation to make high energy photons in the visible wavelengths to improve photovoltaics and introduce new bioimaging techniques. In order to harness the intrinsic ability of colloidal semiconductor nanocrystals to couple strongly with light, it is important to efficiently outcouple energy from photoexcited quantum dots (QDs), much like how nature uses molecular antennas to direct light during photosynthesis. This talk focuses on the organic-inorganic interface for triplet-fusion based photon upconversion, where orb

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Markovic, Zoran, Jovana Prekodravac, Dragana Tosic, et al. "Facile synthesis of water-soluble curcumin nanocrystals." Journal of the Serbian Chemical Society 80, no. 1 (2015): 63–72. http://dx.doi.org/10.2298/jsc140819117m.

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In this paper, facile synthesis of water soluble curcumin nanocrystals is reported. Solvent exchange method was applied to synthesize curcumin nanocrystals. Different techniques were used to characterize the structural and photophysical properties of curcumin nanocrystals. We found that nanocurcumin prepared by this method had good chemical and physical stability, could be stored in the powder form at room temperature, and was freely dispersible in water. It was established that the size of curcumin nanocrystals was varied in the range of 20-500 nm. Fourier transform infrared spectroscopy and

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Cai, Jing, Vijay Raghavan, Yu Jie Bai, et al. "Controllable synthesis of tetrapod gold nanocrystals with precisely tunable near-infrared plasmon resonance towards highly efficient surface enhanced Raman spectroscopy bioimaging." Journal of Materials Chemistry B 3, no. 37 (2015): 7377–85. http://dx.doi.org/10.1039/c5tb00785b.

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Mak, Chun Hin, Jiasheng Qian, Lukas Rogée, Wai Kin Lai, and Shu Ping Lau. "Facile synthesis of AgBiS2 nanocrystals for high responsivity infrared detectors." RSC Advances 8, no. 68 (2018): 39203–7. http://dx.doi.org/10.1039/c8ra08509a.

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Onishchuk, D. A., A. S. Pavlyuk, P. S. Parfenov, A. P. Litvin, and I. R. Nabiev. "Near Infrared LED Based on PbS Nanocrystals." Optics and Spectroscopy 125, no. 5 (2018): 751–55. http://dx.doi.org/10.1134/s0030400x1811022x.

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Bigioni, T. P., R. L. Whetten, and Ö. Dag. "Near-Infrared Luminescence from Small Gold Nanocrystals." Journal of Physical Chemistry B 104, no. 30 (2000): 6983–86. http://dx.doi.org/10.1021/jp993867w.

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Lee, Doh C., Jeffrey M. Pietryga, Istvan Robel, Donald J. Werder, Richard D. Schaller, and Victor I. Klimov. "Colloidal Synthesis of Infrared-Emitting Germanium Nanocrystals." Journal of the American Chemical Society 131, no. 10 (2009): 3436–37. http://dx.doi.org/10.1021/ja809218s.

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Zang, Huidong, Prahlad K. Routh, Qingping Meng, and Mircea Cotlet. "Electron transfer dynamics from single near infrared emitting lead sulfide–cadmium sulfide nanocrystals to titanium dioxide." Nanoscale 9, no. 38 (2017): 14664–71. http://dx.doi.org/10.1039/c7nr03500d.

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Baride, Aravind, Ganesh Sigdel, William M. Cross, Jon J. Kellar, and P. Stanley May. "Near Infrared-to-Near Infrared Upconversion Nanocrystals for Latent Fingerprint Development." ACS Applied Nano Materials 2, no. 7 (2019): 4518–27. http://dx.doi.org/10.1021/acsanm.9b00890.

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Yang, J., D. H. Li, and L. L. Ji. "A Low-Temperature Hydrothermal Synthesis of Prussian Blue Nanocrystal and Its Application in H2O2 Detection." Journal of Chemistry 2022 (July 21, 2022): 1–7. http://dx.doi.org/10.1155/2022/7593873.

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Uniform Prussian blue Fe3[Fe(CN)6]2 nanocrystals were synthesized by a direct dissociation and reduction of the single-Fe(III)-source precursor K3Fe(CN)6 under low-temperature hydrothermal conditions. UV-visible absorption spectrum, Fourier transform infrared spectrum, X-ray diffraction, field emission scanning electron microscope, X-ray photoelectron spectra, high-resolution transmission electron microscopy, and electrochemical testing were used to characterize and verify the synthesized Prussian blue nanocrystal product. The size of the synthesized product had a strong dependence on the acid

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Mazzanti, Andrea, Zhijie Yang, Mychel G. Silva, et al. "Light–heat conversion dynamics in highly diversified water-dispersed hydrophobic nanocrystal assemblies." Proceedings of the National Academy of Sciences 116, no. 17 (2019): 8161–66. http://dx.doi.org/10.1073/pnas.1817850116.

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We investigate, with a combination of ultrafast optical spectroscopy and semiclassical modeling, the photothermal properties of various water-soluble nanocrystal assemblies. Broadband pump–probe experiments with ∼100-fs time resolution in the visible and near infrared reveal a complex scenario for their transient optical response that is dictated by their hybrid composition at the nanoscale, comprising metallic (Au) or semiconducting (Fe3O4) nanostructures and a matrix of organic ligands. We track the whole chain of energy flow that starts from light absorption by the individual nanocrystals a

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