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Journal articles on the topic 'Doped Nanocrystals'

Author: Grafiati

Published: 9 March 2023

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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2

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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3

Kim, Na-Ri, Kyung-Kwang Joo, and Hyun-Gi Lee. "Investigating the Potential of Perovskite Nanocrystal-Doped Liquid Scintillator: A Feasibility Study." Sensors 23, no. 23 (2023): 9490. http://dx.doi.org/10.3390/s23239490.

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Liquid scintillators are extensively employed as targets in neutrino experiments and in medical radiography. Perovskite nanocrystals are recognized for their tunable emission spectra and high photoluminescence quantum yields. In this study, we investigated the feasibility of using perovskites as an alternative to fluor, a substance that shifts the wavelengths. The liquid scintillator candidates were synthesized by doping perovskite nanocrystals with emission wavelengths of 450, 480, and 510 nm into fluor PPO with varying nanocrystal concentrations in a toluene solvent. The several properties o

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4

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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Zhao, Qing, Xinle Tian, Langtao Ren, Yan Su, and Qianqian Su. "Understanding of Lanthanide-Doped Core–Shell Structure at the Nanoscale Level." Nanomaterials 14, no. 12 (2024): 1063. http://dx.doi.org/10.3390/nano14121063.

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The groundbreaking development of lanthanide-doped core–shell nanostructures have successfully achieved precise optical tuning of rare-earth nanocrystals, leading to significant improvements in energy transfer efficiency and facilitating multifunctional integration. Exploring the atomic-level structural, physical, and optical properties of rare-earth core–shell nanocrystals is essential for advancing our understanding of their fundamental principles and driving the development of emerging applications. However, our knowledge of the atomic-level structural details of rare-earth nanocrystal core

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Ishigaki, Takamasa, Ji Guang Li, and Yusuke Moriyoshi. "Thermal Plasma Processing of Functional Ceramic Materials." Advances in Science and Technology 45 (October 2006): 281–84. http://dx.doi.org/10.4028/www.scientific.net/ast.45.281.

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Fe- and Eu-doped TiO2 nanocrystals were synthesized via Ar/O2 thermal plasma oxidation of liquid precursor mists. The use of mists ensures atomic level mixing of the elements and high supersaturation of the evaporated species upon plasma oxidation, which favors nanocrystal formation upon condensation. Iron-doped TiO2 nanopowders with controlled iron to titanium atomic ratios (RFe/Ti) ranging from 0 to 20%, were synthesized by oxidative pyrolysis of liquid-feed metallorganic precursors containing titanium tetra-n-butoxide (TTBO) and ferrocene. Europium doped TiO2 luminescent nanocrystals were a

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7

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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8

Kang, Myung Jong, Na Hyeon An, and Young Soo Kang. "Magnetic and Photochemical Properties of Cu Doped Hematite Nanocrystal." Materials Science Forum 893 (March 2017): 136–43. http://dx.doi.org/10.4028/www.scientific.net/msf.893.136.

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In this report, the magnetic and photochemical properties of Cu doped hematite nanocrystal was investigated intensively. The Cu doped hematite nanocrystals were prepared by hydrothermal method, changing the molar ratio of Cu precursors. The XRD and XPS techniques are used for revealing crystal and chemical state of Cu doped hematite nanocrystal. Raman spectroscopy was also used for confirming Cu atoms replacing Fe position in Cu doped hematite crystal. The UV-vis and UPS were used for assigning electronic band position for photocatalytic properties. Cu doped hematite showed the enhanced photoc

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9

JACOBY, MITCH. "DOPED NANOCRYSTALS." Chemical & Engineering News 83, no. 28 (2005): 9. http://dx.doi.org/10.1021/cen-v083n028.p009.

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10

Norris, D. J., A. L. Efros, and S. C. Erwin. "Doped Nanocrystals." Science 319, no. 5871 (2008): 1776–79. http://dx.doi.org/10.1126/science.1143802.

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11

Sercel, Peter C., Andrew Shabaev, and Alexander L. Efros. "Symmetry Breaking Induced Activation of Nanocrystal Optical Transitions." MRS Advances 3, no. 14 (2018): 711–16. http://dx.doi.org/10.1557/adv.2018.19.

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ABSTRACTWe have analysed the effect of symmetry breaking on the optical properties of semiconductor nanocrystals due to doping by charged impurities. Using doped CdSe nanocrystals as an example, we show the effects of a Coulomb center on the exciton fine-structure and optical selection rules using symmetry theory and then quantify the effect of symmetry breaking on the exciton fine structure, modelling the charged center using a multipole expansion. The model shows that the presence of a Coulomb center breaks the nanocrystal symmetry and affects its optical properties through mixing and shifti

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12

JAVAN, MASOUD BEZI. "ELECTRONIC AND OPTICAL PROPERTIES OF NITROGEN DOPED SiC NANOCRYSTALS: FIRST PRINCIPLES STUDY." International Journal of Modern Physics B 27, no. 13 (2013): 1350053. http://dx.doi.org/10.1142/s0217979213500537.

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A typical nitrogen doped spherical SiC nanocrystal with a diameter of 1.2 nm ( Si 43 C 44 H 76) using linear combination atomic orbital (LCAO) in combination with pseudopotential density functional calculation have been studied. Our selected SiC nanocrystal has been modeled taking all the cubic bulk SiC atoms contained within a sphere of a given radius and terminating the surface dangling bonds with hydrogen atoms. We have examined nine possible situations in which nitrogen has a high probability for replacement in the lattice or placed between atoms in the nanocrystal. We have found that the

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13

Sung, Yun-Mo, Woo-Chul Kwak, Woong Kim, and Tae Geun Kim. "Enhanced ripening behavior of Mg-doped CdSe quantum dots." Journal of Materials Research 23, no. 7 (2008): 1916–21. http://dx.doi.org/10.1557/jmr.2008.0238.

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Pure CdSe and Mg-doped CdSe nanocrystal quantum dots were synthesized into the zinc-blende structure at a low temperature by the inverse micelle technique using paraffin oil and oleic acid as surface capping agents. The ripening behavior of the nanocrystals was monitored using the red shift in ultraviolet (UV)-visible light absorption peaks, and their size variation was estimated using the so-called, quantum confinement theory. The Lifshitz–Slyozov–Wagner (LSW) kinetics analyses were performed based on the variation in size according to the ripening temperature and time period. The activation

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14

Hossain, Rayhan, and Allen Apblett. "Cr3+-Doped Anatase-Phase TiO2 Nanocrystals with (101) and (004) Dominant Facets: Synthesis and Characterization." Catalysts 15, no. 1 (2025): 33. https://doi.org/10.3390/catal15010033.

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Anatase-phase rod-shaped TiO2 nanocrystals are prepared by the solvothermal method, the surface is metalated, and doped nanocrystals are achieved by thermal diffusion of surface metal ions. Incorporation of dopant ions into TiO2 lattice enhances the visible light absorption of the material and in some cases can increase the rate of photocatalysis. Even though there are overflowing studies on the preparation of doped TiO2 materials, there are no methods that enable the precise control of dopant concentration in TiO2 nanocrystals. We have developed a method to load the surface of oleic acid stab

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15

Ramasamy, Palanichamy, Ayyadurai Mani, Balakrishnan Sneha, et al. "Synthesis and Characterisation of Sudan Red-G/Cyclodextrin Doped ZnO Nanocrystals." American Journal of Physical Chemistry 14, no. 2 (2025): 23–32. https://doi.org/10.11648/j.ajpc.20251402.12.

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Sudan Red-G/cyclodextrin-doped zinc oxide nanocrystals are synthesized and characterized by UV-visible, fluorescence, FTIR, DTA, XRD, SEM, and TEM methods. Solvent and cyclodextrin studies confirm the existence of the azo-hydrazo tautomer in the SRG molecule. The ground and excited state absorption wavelengths of SRG are similar to Red G, Sudan I, and Sudan II. The dipole moment, internal energy, free energy, enthalpy, entropy, and the HOMO-LUMO energy levels of SRG, α-CD, β-CD, SRG/α-CD, and SRG/β-CD are determined using the PM3 method. SRG&apos;s horizontal bond length is higher than the

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16

Żaba, Adam, Svitlana Sovinska, Tetiana Kirish, Adam Węgrzynowicz, and Katarzyna Matras-Postołek. "Photodegradation Process of Organic Dyes in the Presence of a Manganese-Doped Zinc Sulfide Nanowire Photocatalyst." Materials 14, no. 19 (2021): 5840. http://dx.doi.org/10.3390/ma14195840.

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Zinc sulfide (ZnS) nanowires represent a promising candidate in many fields, including optoelectronics and photocatalysis because of their advantages such as excellent optical properties, chemical stability and an easy-scalable simple synthesis method. In this study, an energy-friendly microwave radiation process was used to develop the single-step, solvothermal process for the growth of manganese-doped zinc sulfide (ZnS) and undoped nanocrystals (NCs) in the forms of nanowires using two short amines as a stabilizer, e.g. ethylenediamine and hydrazine, respectively. ZnS nanowires doped with Mn

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17

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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18

Sarkar, Suresh, Amit K. Guria, Biplab K. Patra, and Narayan Pradhan. "Synthesis and photo-darkening/photo-brightening of blue emitting doped semiconductor nanocrystals." Nanoscale 6, no. 7 (2014): 3786–90. http://dx.doi.org/10.1039/c3nr06048a.

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19

Clarysse, Jasper, Annina Moser, Olesya Yarema, Vanessa Wood, and Maksym Yarema. "Size- and composition-controlled intermetallic nanocrystals via amalgamation seeded growth." Science Advances 7, no. 31 (2021): eabg1934. http://dx.doi.org/10.1126/sciadv.abg1934.

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Intermetallic nanocrystals are a large family of emerging materials with extensive applications in many fields. Yet, a generalized synthetic method for intermetallic nanocrystals is lacking. Here, we report the development of a colloidal synthesis method based on amalgamation of monometallic nanocrystal seeds with low–melting point metals. We use this approach to achieve crystalline and compositionally uniform intermetallic nanocrystals of Au-Ga, Ag-Ga, Cu-Ga, Ni-Ga, Pd-Ga, Pd-In, and Pd-Zn compounds. We demonstrate both compositional tunability across the phase spaces (e.g., AuGa2, AuGa, Au7G

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20

Jin, Yizheng, Yuping Ren, MoTao Cao, and Zhizhen Ye. "Doped Colloidal ZnO Nanocrystals." Journal of Nanomaterials 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/985326.

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Colloidal ZnO nanocrystals are promising for a wide range of applications due to the combination of unique multifunctional nature and remarkable solution processability. Doping is an effective approach of enhancing the properties of colloidal ZnO nanocrystals in well-controlled manners. In this paper, we analyzed two synthetic strategies for the doped colloidal ZnO nanocrystals, emphasizing our understanding on the critical factors associated with the high temperature and nonaqueous approach. Latest advances of three topics, bandgap engineering, n-type doping, and dilute magnetic semiconductor

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21

Knecht, Tawney A., Shannon W. Boettcher, and James E. Hutchison. "Electrochemistry-Induced Restructuring of Tin-Doped Indium Oxide Nanocrystal Films of Relevance to CO₂ Reduction." Journal of The Electrochemical Society 168, no. 12 (2021): 126521. http://dx.doi.org/10.1149/1945-7111/ac40ca.

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The electrochemical reduction of CO2 into fuels using renewable electricity presents an opportunity to utilize captured CO2. Electrocatalyst development has been a primary focus of research in this area. This is especially true at the nanoscale, where researchers have focused on understanding nanostructure-property relationships. However, electrocatalyst structure may evolve during operation. Indium- and tin-based oxides have been widely studied as electrocatalysts for CO2 reduction to formate, but evolution of these catalysts during operation is not well-characterized. Here, we report the evo

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22

Kasik, I., O. Podrazky, J. Mrazek, et al. "Erbium and Al2O3 nanocrystals-doped silica optical fibers." Bulletin of the Polish Academy of Sciences Technical Sciences 62, no. 4 (2014): 641–46. http://dx.doi.org/10.2478/bpasts-2014-0070.

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Abstract. Fibre lasers and inherently rare-earth-doped optical fibers nowadays pass through a new period of their progress aiming at high efficiency of systems and their high power. In this paper, we deal with the preparation of silica fibers doped with erbium and Al2O3 nanocrystals and the characterization of their optical properties. The fibers were prepared by the extended Modified Chemical Vapor Deposition (MCVD) method from starting chlorides or oxide nanopowders. Conventional as well as modified approaches led to a nanocrystalline mullite phase formation in the fiber cores in which erbiu

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23

Xu, Lili, Man Wang, Qing Chen та ін. "Rare Earth Hydroxide as a Precursor for Controlled Fabrication of Uniform β-NaYF4 Nanoparticles: A Novel, Low Cost, and Facile Method". Molecules 24, № 2 (2019): 357. http://dx.doi.org/10.3390/molecules24020357.

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In recent years, rare earth doped upconversion nanocrystals have been widely used in different fields owing to their unique merits. Although rare earth chlorides and trifluoroacetates are commonly used precursors for the synthesis of nanocrystals, they have certain disadvantages. For example, rare earth chlorides are expensive and rare earth trifluoroacetates produce toxic gases during the reaction. To overcome these drawbacks, we use the less expensive rare earth hydroxide as a precursor to synthesize β-NaYF4 nanoparticles with multiform shapes and sizes. Small-sized nanocrystals (15 nm) can

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24

Qiang, Liang Sheng, Dong Yan Tang, Xing Hong Zhang, and L. Jin. "High-Speed Synthesis and Electric Properties of Magnesium Doped Lead Titanate Ceramics." Solid State Phenomena 121-123 (March 2007): 149–52. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.149.

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By adding methyl alcohol/water solution with certain concentration into sol to hydrolysis directly and sintering the fresh sol directly, lead titanate(PbTiO3) ceramics doped with magnesium are prepared by using magnesium acetate as doper to prohibit the disadvantages contained in conventional sol-gel method, such as low hydrolytic rate, high sintering temperature, long preparation period. The changes of structure, microstructure, synthesis process and electric properties of modified ceramics are studied in detail. The sizes and morphology of high purely and high density magnesium doped lead ti

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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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26

Dong, Cong. "The Silver Ion and Nanocrystalline Pattern in the Glass Substrate, the Electric Field-Induced Thermal Transfer and Ink Absorption Layer Structure and Printing Performance." Advances in Materials Science and Engineering 2022 (August 11, 2022): 1–10. http://dx.doi.org/10.1155/2022/4272294.

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People’s research on nanocrystals is getting more in-depth with the development of science and technology, and the patterned arrangement of nanocrystals can greatly improve the performance of our equipment in related fields, allowing people to control the patterning of nanocrystals. Research on thermal transfer is also increasing. Glass materials doped with patterned metal nanocrystals have great application potential, and the search for a simple and efficient patterned preparation method has attracted great attention of many researchers. Using the directional induced migration effect of the h

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27

Mote, Vishwanath D., and Babasaheb N. Dole. "Effect of PEG on Structural and Magnetic Properties of Mn Doped ZnO Nanocrystals." Advanced Materials Research 678 (March 2013): 234–38. http://dx.doi.org/10.4028/www.scientific.net/amr.678.234.

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Nanosized Mn doped ZnO samples were synthesized by co-precipitation method using Polyethylene glycol (PEG) as a capping agent. X- ray diffraction patterns confirm that the pure and Mn doped ZnO nanocrystals have wurtzite structure without any seconadary phases. Lattice parameters of pure and Mn doped ZnO nanocrystals increase slightly with increasing Mn concentration. The average crystalline size of pure and Mn doped ZnO nanocrystals are in the range of 14-18 nm. The X-ray density for pure and Mn doped ZnO sample is calculated using lattice parameters. It is found that almost static for Mn dop

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28

Secu, Corina, Arpad-Mihai Rostas, and Mihail Secu. "Europium (II)-Doped CaF2 Nanocrystals in Sol-Gel Derived Glass-Ceramic: Luminescence and EPR Spectroscopy Investigations." Nanomaterials 12, no. 17 (2022): 3016. http://dx.doi.org/10.3390/nano12173016.

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The remarkable properties of Eu2+-activated phosphors, related to the broad and intense luminescence of Eu2+ ions, showed a high potential for a wide range of optical-related applications. Oxy-fluoride glass-ceramic containing Europium (II)-doped CaF2 nanocrystals embedded in silica matrix were produced in two steps: glass-ceramization in air at 800° with Eu3+-doped CaF2 nanocrystals embedded followed by Eu3+ to Eu2+ reduction during annealing in reducing atmosphere. The broad, blue luminescence band at 425 nm and with the long, weak tail in the visible range is assigned to the d → f type tran

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29

Jana, Santanu, Bhupendra B. Srivastava, Somnath Jana, Riya Bose, and Narayan Pradhan. "Multifunctional Doped Semiconductor Nanocrystals." Journal of Physical Chemistry Letters 3, no. 18 (2012): 2535–40. http://dx.doi.org/10.1021/jz3010877.

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30

Kadam, Pratibha, Chitra Agashe, and Shailaja Mahamuni. "Al-doped ZnO nanocrystals." Journal of Applied Physics 104, no. 10 (2008): 103501. http://dx.doi.org/10.1063/1.3020527.

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31

Clavel, Guylhaine, Marc-Georg Willinger, David Zitoun, and Nicola Pinna. "Manganese-Doped Zirconia Nanocrystals." European Journal of Inorganic Chemistry 2008, no. 6 (2008): 863–68. http://dx.doi.org/10.1002/ejic.200700977.

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32

Zhao, Pengcheng, Meiling Zhang, Tianjiao Wang, et al. "Optical Amplification at 1525 nm in BaYF5: 20% Yb3+, 2% Er3+Nanocrystals Doped SU-8 Polymer Waveguide." Journal of Nanomaterials 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/153028.

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We demonstrated optical amplification in BaYF5: 20% Yb3+, 2% Er3+(BYF) nanocrystals doped polymer waveguide. BYF nanocrystals with an average size of ∼13 nm were synthesized by a high-boiling solvent process. Intense 1.53 μm fluorescence was obtained in the nanocrystals under excitation at 980 nm. An optical polymer waveguide was fabricated by using BYF nanocrystals doped SU-8 polymer as the core material. A relative optical gain of ∼10.4 dB at 1525 nm was achieved in a 1.1 cm long waveguide for an input signal power of ∼0.09 mW and a pump power of ∼212 mW.

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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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Zhai, Bao-Gai, Long Yang, Qing-Lan Ma, and Yuan Ming Huang. "Visible light driven photocatalytic activity of Fe-doped ZnO nanocrystals." Functional Materials Letters 10, no. 02 (2017): 1750002. http://dx.doi.org/10.1142/s1793604717500023.

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Fe-doped ZnO nanocrystals at the level of 8[Formula: see text]mol% were synthesized via the co-precipitation method and then characterized by transmission electron microscopy, X-ray diffraction, diffuse reflectance spectroscopy and UV–Vis absorption spectroscopy. Strong absorptions with its peak at around 500[Formula: see text]nm were recorded in the range of 400–600[Formula: see text]nm for Fe-doped ZnO nanocrystals. Visible-light driven photocatalytic activity of Fe-doped ZnO nanocrystals was demonstrated via the photocatalytic degradation of methyl orange dye. Density functional calculation

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35

Farha, Ashraf H., Mervat M. Ibrahim, and Shehab A. Mansour. "Ga-Doped ZnO Nanostructured Powder for Cool-Nanopigment in Environment Applications." Materials 13, no. 22 (2020): 5152. http://dx.doi.org/10.3390/ma13225152.

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Gallium (Ga) doped zinc oxide (ZnO) nanocrystals were successfully synthesized via a γ-radiation-assisted polymer-pyrolysis route. Ga doped ZnO samples with Ga and ZnO precursor salts with molar ratios of 0%, 3%, 5%, and 10% were produced. A γ-radiation dosage of 1.5 kGy was used for polymerization initiation during the sample preparation. The properties of the obtained nanocrystal samples were characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR), UV-visible absorption, NIR-VIS-UV diffused reflectance, and high-resolution transmission electron microscopy (HR-TEM) char

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Santos, D. A. A., A. D. P. Rocha, and M. A. Macêdo. "Rietveld refinement of transition metal doped ZnO." Powder Diffraction 23, S1 (2008): S36—S41. http://dx.doi.org/10.1154/1.2903739.

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Nanocrystals of Zn1−xMxO (M=Mn, Co, or Ni) were grown using proteic sol-gel process, and the crystalline phases were identified by X-ray diffraction and Rietveld refinement. The nanocrystals have hexagonal wurtzite structure, with space group P63mc. The insertion of Mn2+ in the place of Zn2+ provoked an increase in the size of the nanocrystals, and the insertion of Co2+ or Ni2+ caused a reduction in the sizes of the nanocrystals, as compared to pure ZnO. This occurred because these three transition metals have very different ionic radii (Co2+=0.58 A˚, Mn2+=0.66 A˚, Ni2+=0.55 A˚, and Zn2+=0.60

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Pankratov, V., Larisa Grigorjeva, Donats Millers, Tadeusz Chudoba, Robert Fedyk, and Witold Łojkowski. "Time-Resolved Luminescence Characteristics of Cerium Doped YAG Nanocrystals." Solid State Phenomena 128 (October 2007): 173–78. http://dx.doi.org/10.4028/www.scientific.net/ssp.128.173.

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Time-resolved luminescence characteristics have been studied for cerium doped YAG nanopowders (NP) and nanostructured ceramics (NC). The results obtained have been compared to the luminescence characteristics for the well studied YAG:Ce3+ single crystal (SC). It was detected that the luminescence decay kinetics of Ce3+ related emission in nanocrystals can be closely approximated by two exponents, whereas a single exponential decay was observed in the single crystal. It was also found that the luminescence decay time and light yield of Ce3+ emission are strongly dependent on the cerium concentr

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38

Zeng, Ruosheng, Zhiguo Sun, Sheng Cao, et al. "Facile synthesis of Ag-doped ZnCdS nanocrystals and transformation into Ag-doped ZnCdSSe nanocrystals with Se treatment." RSC Advances 5, no. 2 (2015): 1083–90. http://dx.doi.org/10.1039/c4ra11064a.

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High-quality, pure, and color-tunable Ag:ZnCdS nanocrystals are prepared by optimization of the experimental conditions, and they can be further transformed into Ag:ZnCdSSe nanocrystals with Se treatment.

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Gedara, Sriyani Menike Korale, Zi-You Ding, Iresha Lakmali Balasooriya, Yingchao Han, and Merita Nirmali Wickramaratne. "Hydrothermal Synthesis and In Vivo Fluorescent Bioimaging Application of Eu3+/Gd3+ Co-Doped Fluoroapatite Nanocrystals." Journal of Functional Biomaterials 13, no. 3 (2022): 108. http://dx.doi.org/10.3390/jfb13030108.

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In this study, Eu3+/Gd3+ co-doped fluoroapatitååe (Eu/Gd:FAP) nanocrystals were synthesized by the hydrothermal method as a fluorescent bioimaging agent. The phase composition, morphology, fluorescence, and biosafety of the resulting samples were characterized. Moreover, the in vivo fluorescent bioimaging application of Eu/Gd:FAP nanocrystals was evaluated in mice with subcutaneously transplanted tumors. The results showed that the Eu/Gd:FAP nanocrystals were short rod-like particles with a size of 59.27 ± 13.34 nm × 18.69 ± 3.32 nm. With an increasing F substitution content, the Eu/Gd:FAP nan

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Callone, Emanuela, Giovanni Carturan, Yoann Jestin, and Maurizio Ferrari. "Synthesis Improvement of Yb³⁺-Activated SnO₂ Nanocrystals." Solid State Phenomena 128 (October 2007): 31–40. http://dx.doi.org/10.4028/www.scientific.net/ssp.128.31.

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Yb3+ doped SnO2 nanocrystals were synthesized, using the hydrolytic route in the presence of starch as the size stabilizer. Starting from salt precursors, the nanopowders obtained with various Yb3+ loads are thermally stable up to 600 °C. They were characterized by XRD, solid state NMR, TEM, ICP and TG-MS techniques. The nanocrystal Cassiterite structure, with a size of a few nanometers (<6 nm), was identified by XRD, NMR and Raman measurements confirming a homogeneous dispersion of Yb3+ ions in the lattice. The preliminary assessment of the spectroscopic features of nanocrystals was perfor

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Selvam, R., I. Devadoss, A. Krishnamoorthy, and S. P. Sheeba. "Influence of chromium concentration on the structural, optical, magnetical, and thermal properties of ZnS nanocrystals." Chalcogenide Letters 21, no. 9 (2024): 747–55. http://dx.doi.org/10.15251/cl.2024.219.747.

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Pure ZnS and Zn1-xCrxS nanoparticles were successfully prepared using the coprecipitation method, where x represents the concentration (x = 0.00, 0.10, and 0.05). There are many analytical methods used, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and Spectroscopy of energy dispersive (EDS). The magnetism structure of the catalysts was investigated using spectrophotometry (VSM), thermogravimetric analysis (TGA), and differential thermal analysis (DTA). X-ray diffraction studies determine the nanocrystal arrangement and size of microcrystals. As seen in SEM analysis, the

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Takezawa, Yoko, Minoru Ryu, Yoshiki Iwazaki, Toshimasa Suzuki, Youichi Mizuno, and Hiroaki Imai. "Effect of a Boron Additive on the Microstructure and Dielectric Properties of BaTiO₃ Thin Films Formed by Nanocrystal Deposition." Key Engineering Materials 566 (July 2013): 277–80. http://dx.doi.org/10.4028/www.scientific.net/kem.566.277.

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Highly crystallized BaTiO3 thin films were fabricated by a nanocrystal sintering process. Boron alkoxide was introduced into a slurry of Mn-doped BaTiO3 nanocrystals with particle sizes of 5-7 nm. The deposited nanocrystal film on a (111)-oriented Pt/TiO2/Al2O3 substrate was sintered at a low temperature of 800 °C and the obtained film had highly densified and oriented microstructures. We found that the boron additive enhanced the grain growth of nanoparticles and as a result the dielectric constant of the thin film increased to 1100 at 10 kHz, which is much higher than that of undoped BaTiO3

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Ma, Long, Zhiqiang Wei, Xueliang Zhu, Jiahao Liang, and Xudong Zhang. "Synthesis and Photocatalytic Properties of Co-Doped Zn1-xCoxMn2O Hollow Nanospheres." Journal of Nanomaterials 2019 (May 9, 2019): 1–9. http://dx.doi.org/10.1155/2019/4257270.

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A series of Co-doped Zn1-xCoxMn2O nanocrystals with a spinel structure were successfully prepared by hydrothermal method, and the influence of Co doping concentration on the microstructure, morphology, elemental composition, and optical and photocatalytic properties of the samples was characterized. The experimental results show that all samples exhibit a tetragonal structure, Co2+ ions are successfully substituted for the lattice site of Zn2+ to generate ZnMn2O4 nanocrystals, and the crystalline size decreases as Co-doped concentration increase. The morphologies are loose hollow microsphere s

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Ghosh, Subhabrata, Sylvia Turrell, Maurizio Ferrari, and Shivakiran Bhaktha B. N. "Optical Gain in Eu-Doped Hybrid Nanocrystals Embedded SiO2-HfO2-ZnO Ternary Glass-Ceramic Waveguides." Spectroscopy Journal 3, no. 1 (2025): 3. https://doi.org/10.3390/spectroscj3010003.

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Rare-earth doped transparent glass-ceramic waveguides are playing a very crucial role in integrated optics. We fabricated ZnO-HfO2 hybrid nanocrystals embedded with 70 SiO2–(30-x) HfO2–x ZnO (x = 0, 2, 5 and 7 mol %) ternary transparent glass-ceramic waveguides doped with 1 mol % Eu-ions. The formation and size of the nanocrystals evolved with an increase in ZnO concentration in the glass-ceramic waveguides. In this context, key factors of such nanocrystals embedded active glass-ceramic waveguides were optical losses and transparency. A lab-built m-line experimental set-up was used for the cha

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Kim, Hyunjung, and Hanleem Lee. "Improvement of Chemical Stability of Perovskite Nanocrystals as a Photoelectrochemical Catalyst for Hydrogen Evolution Reaction." Catalysts 13, no. 4 (2023): 752. http://dx.doi.org/10.3390/catal13040752.

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Recent advances in the synthesis and processing of perovskite materials have led to significant improvements in their stability under harsh conditions, making them increasingly attractive for use as photo and photoelectrochemical catalysts. In particular, core-shell structured perovskite nanocrystals have greatly enhanced chemical stability, enabling their use in aqueous environments; however, their low conductivity remains a challenge. To address this issue, this study developed two-time cross-linkable core-shell perovskite nanocrystals using two types of silanes, resulting in excellent chemi

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Gouget, Guillaume, Morgane Pellerin, Lauriane Pautrot-D'Alençon, Thierry Le Mercier, and Christopher B. Murray. "Efficient photoluminescence of isotropic rare-earth oxychloride nanocrystals from a solvothermal route." Chemical Communications 56, no. 23 (2020): 3429–32. http://dx.doi.org/10.1039/d0cc00113a.

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Sub-10 nm near-spherical LaOCl nanocrystals were prepared by solvothermal synthesis from hydrated rare-earth chlorides. Eu<sup>3+</sup>-doped (5%) LaOCl nanocrystals display 43% photoluminescence quantum yield.

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Thien, Nguyen Duy, Nguyen Ngoc Tu, Ngo Nhu Viet, Nguyen Duy Phuong, Le Van Vu, and Nguyen Ngoc Long. "Hydrothermal Synthesis and Optical Properties of Undoped and \(\text{Eu}^{3+}\)-doped Zinc Stannate Nanocrystals." Communications in Physics 25, no. 4 (2016): 327. http://dx.doi.org/10.15625/0868-3166/25/4/7337.

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Abstract. In this work we report a hydrothermal approach for synthesis of zinc stannate (Zn2SnO4)nanocrystals. Our research focused on the effect of the molar ratio of initial chemicals, reaction temperature and reaction duration on the phase composition and the fluorescence properties.Structural and optical properties of the final products were investigated in detail. X-ray diffractionanalysis indicated that the Zn2SnO4 nanocrystals possess face-centered cubic crystal structure.Raman scattering spectra exhibit two characteristic vibrational modes of Zn2SnO4 crystals. Optical band gap of Eu3+-

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Barman, Barun Kumar, Bidushi Sarkar, and Karuna Kar Nanda. "Pd-coated Ru nanocrystals supported on N-doped graphene as HER and ORR electrocatalysts." Chemical Communications 55, no. 92 (2019): 13928–31. http://dx.doi.org/10.1039/c9cc06208d.

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Pd-coated Ru nanocrystals supported on N-doped graphene (Pd–Ru@NG) are obtained via electroless deposition of Pd on Ru nanocrystals which shows efficient bifunctional HER and ORR electrocatalytic activity.

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Li, Renfu, Xiaodie Fang, Jilou Ren, et al. "The effect of surface-capping oleic acid on the optical properties of lanthanide-doped nanocrystals." Nanoscale 13, no. 29 (2021): 12494–504. http://dx.doi.org/10.1039/d0nr08488c.

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The presence of OA on the surface exerted an effect on the optical properties of lanthanide-doped nanocrystals, but a dissimilar variation was observed for nanocrystals in solid state or colloidal solution.

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Buonsanti, Raffaella, and Delia J. Milliron. "Chemistry of Doped Colloidal Nanocrystals." Chemistry of Materials 25, no. 8 (2013): 1305–17. http://dx.doi.org/10.1021/cm304104m.

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