Relevant bibliographies by topics / ZnS nanoparticles

Academic literature on the topic 'ZnS nanoparticles'

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Published: 6 September 2023

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Journal articles on the topic "ZnS nanoparticles"

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Velázquez, Josian Luciano, and Sonia J. Bailón-Ruiz. "Generation of ZnS Nanostructures with Modified Chemical Surface." MRS Advances 4, no. 38-39 (2019): 2095–102. http://dx.doi.org/10.1557/adv.2019.226.

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ABSTRACTSemiconductor nanomaterials like zinc sulphide have interesting potential applications, consequent to their size-dependent optical properties. These nanostructures can be used on optoelectronic, photocatalysis, solar cells, and fluorescence microscopy, among others. Due to the great use of these nanoparticles in society, there is great concern in the scientific community about the potential negative interaction of these nanomaterials in aquatic environments. The present research was conducted on generation of nanostructures of ZnS with modified surface. This work had three goals: 1) morphological, compositional, and optical characterization of ZnS nanoparticles; 2) surface chemical modification of ZnS nanoparticles with biocompatible molecules; and 3) interaction studies of ZnS nanoparticle. A main absorption peak at ∼365-375nm range and a trap emission peak at ∼425nm were observed in the emission spectrum of ZnS nanoparticles synthesized at 160°C and 180°C and 30 minutes of reaction. The morphology and the size of ZnS were carried out by High Resolution Transmission Electron Microscopy (HR-TEM). In this way, nanoparticles were spherical and with a size less than 10nm. Energy Dispersive X-Ray Spectroscopy evidenced the chemical composition of produced nanostructures. The chemical modification of ZnS nanostructures was corroborated by Infrared Spectroscopy Analysis. The interaction studies of ZnS nanoparticles were studied in aquatic systems in presence of marine organisms. The concentrations of nanoparticles for these studies ranged from 0ppm to 300ppm and the contacting time with the living organisms was 24 and 48 hours. Also, Zn2+ (as Zinc nitrate and Zinc sulphate) was used as comparison purposes. Zinc sulphide nanoparticles covered with thioglycolic acid and L-cysteine evidenced a negative interaction at concentrations higher than 10ppm.
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Chatterjee, Nilanjana, and Baibaswata Bhattacharjee. "An Analytic Contemplation of the Conspicuous Vicissitudes in the Histomorphology of Corpuscles of Stannius of a Freshwater CatfishMystus tengara(Hamilton, 1822) due to the Exposure of ZnS Nanoparticles." Scientifica 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/697053.

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Enhanced surface photooxidation property associated with the ZnS nanoparticles caused the reduction of dissolved oxygen content in water in a dose dependent manner, when ZnS nanoparticles of different sizes are exposed to the water in various concentrations. This property was more prominent for ZnS nanoparticles with smaller sizes.Mystus tengara, exposed to ZnS nanoparticles, responded to hypoxia with varied behavioural, physiological, and cellular responses in order to maintain homeostasis and organ function in an oxygen-depleted environment. The histomorphology of corpuscles of Stannius of the fish showed conspicuous vicissitudes under exposure of ZnS nanoparticles. The population of the cell type with granular cytoplasm showed significant increase at the expense of the other that consisted of agranular cytoplasm with increasing nanoparticle concentration. This can be explained as the defence mechanism of the fish against ZnS nanoparticle induced hypoxia and environmental acidification. The altering histomorphology has been studied employing an analytical approach.
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Huang, Hsin-Liang, H. Paul Wang, Edward M. Eyring, and Juu-En Chang. "Recovery of nanosize zinc from phosphor wastes with an ionic liquid." Environmental Chemistry 6, no. 3 (2009): 268. http://dx.doi.org/10.1071/en08098.

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Environmental context. Very fine phosphor ashes are discharged from particulate collection systems (such as bag houses) in the cathode ray tube or television disassembling processes. Effective recovery of ZnO and ZnS nanoparticles from the phosphor ash can be achieved by extraction with a room temperature ionic liquid. By synchrotron radiation X-ray absorption spectroscopy, the obtained molecular scale data turn out to be very useful in revealing speciation of zinc in the extraction process, which also facilitates the development of a simple nanoparticle recovery method. Abstract. An effective, simple method has been developed for the recovery of ZnO and ZnS nanoparticles from hazardous phosphor ash waste. Experimentally, zinc (77%) in the phosphor ash (that contains mainly zinc (91%)) can be recovered by extraction with a room temperature ionic liquid (RTIL) ([C4mim][PF6], 1-butyl-3-methylimidazolium hexafluorophosphate). Component fitted X-ray absorption near edge structure (XANES) spectra of zinc indicate that metallic zinc (Zn) (9%) in the phosphor ash can be dissolved to form a Zn2+–1-methylimidazole ([mim]) complex during extraction with the RTIL. ZnS and ZnO nanoparticles (60–61%) can also be extracted from the phosphor. Over the 298–523 K temperature range, desired ZnO/ZnS ratios (0.3–0.6) can be obtained since interconversion of ZnS to ZnO in the RTIL is temperature dependent. The Fourier transformed extended X-ray absorption fine structure (EXAFS) data also show that the nanosize ZnS extracted in the RTIL possesses a Zn–S bond distance of 2.33 Å with coordination numbers (CNs) of 3.6–3.7. At 523 K, in the RTIL, ~30% of the ZnS is oxidised to form octahedral ZnO (with a bond distance of 2.10 Å and a CN of 6.1) that may coat the surfaces of the ZnS nanoparticles. This work exemplifies the utilisation of X-ray absorption spectroscopy (EXAFS and XANES) to reveal speciation and possible reaction pathways in a nanoparticle extraction process (with a RTIL) in detail.
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Mirnaya, Tatiana, Galina Yaremchuk, and Alexander Kosheliev. "SYNTHESIS AND OPTICAL PROPERTIES OF MESOMORPHIC GLASSY NANOCOMPOSITES BASED ON CADMIUM CAPRYLATE WITH CdSe / ZnS HETERONANOPARTICLES." Ukrainian Chemistry Journal 85, no. 1 (February 15, 2019): 13–18. http://dx.doi.org/10.33609/0041-6045.85.1.2019.13-18.

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The paper presents on the synthesis and optical properties of mesomorphic composites, based on a glassy liquid-crystalline caprylate matrix, with CdSе/ZnS hetero-nanoparticles. The synthesis of complex core-shell semiconductor nanoparticles was carried out by fusing together a cadmium caprylate composite with CdSе nanoparticles and zinc caprylate composite with ZnS nanoparticles. The cadmium and zinc chalcogenide nanoparticles have been synthesized in molten cadmium caprylate and zinc caprylate respectively. It has been found by optical spectroscopy that the have hetero-nanoparticles a core-shell structure. The effect of the composition (molar ratio of the components) of CdSе/ZnS hetero-nanoparticles on their spectral characteristics has been studied. It has been shown that the nanocomposites with hetero-nanoparticles are characterized by a more intense exciton fluorescence band than composites with individual CdSе or ZnS nanoparticles. It has been found that by varying the hetero-nanoparticle composition, one can change the core-shell thickness ratio and adjust thereby the absorption and emission band edge. As the number of ZnS nanoparticles in CdSе/ZnS hetero-nanoparticles increases some narrowing of the long- wavelength emission region first takes plase, which may be attributed to a reduction in the recombination of the smaller number of surface trapped exciton, and then, at a large ZnS content, a broadening of the long- wavelength emission region takes plase due to the extended CdSе/ZnS surface. It has been found that the main contribution to the exciton fluorescence of nanocomposites with CdSе/ZnS hetero-nanoparticles is made by cadmium selenide nanoparticles, and that zinc sulfide nanoparticles enhance exciton fluorescence, also due to decrease in surface emission. It has been shown that the nanocomposites with hetero-nanoparticles are characterized by a more intense exciton fluorescence band that the nanocomposites with individual CdSе. The highest emission is observed in the case of the 35-55 % ZnS content of the shell, and at a smaller or larger amount of ZnS, emission intensity decreases.
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Hu, Siyi, Yu Ren, Yue Wang, Jinhua Li, Junle Qu, Liwei Liu, Hanbin Ma, and Yuguo Tang. "Surface plasmon resonance enhancement of photoluminescence intensity and bioimaging application of gold nanorod@CdSe/ZnS quantum dots." Beilstein Journal of Nanotechnology 10 (January 3, 2019): 22–31. http://dx.doi.org/10.3762/bjnano.10.3.

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Biological applications of core/shell near-infrared quantum dots (QDs) have attracted broad interest due to their unique optical and chemical properties. Additionally, the use of multifunctional nanomaterials with near-infrared QDs and plasmonic functional nanoparticles are promising for applications in electronics, bioimaging, energy, and environmental-related studies. In this work, we experimentally demonstrate how to construct a multifunctional nanoparticle comprised of CdSe/ZnS QDs and gold nanorods (GNRs) where the GNRs were applied to enhance the photoluminescence (PL) of the CdSe/ZnS QDs. In particular, we have obtained the scattering PL spectrum of a single CdSe/ZnS QD and GNR@CdSe/ZnS nanoparticle and comparison results show that the CdSe/ZnS QDs have an apparent PL enhancement of four-times after binding with GNRs. In addition, in vitro experimental results show that the biostability of the GNR@CdSe/ZnS nanoparticles can be improved by using folic acid. A bioimaging study has also been performed where GNR@CdSe/ZnS nanoparticles were used as an optical process for MCF-7 breast cancer cells.
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Bhattacharjee, Baibaswata, Nilanjana Chatterjee, and Chung-Hsin Lu. "Harmful Impact of ZnS Nanoparticles on Daphnia sp. in the Western Part (Districts of Bankura and Purulia) of West Bengal, India." ISRN Nanomaterials 2013 (September 16, 2013): 1–7. http://dx.doi.org/10.1155/2013/207239.

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ZnS nanoparticles of different sizes are synthesized employing a simple wet chemical method. These nanoparticles are used to study their impact on the Daphnia sp. through traditional toxicity tests. The percentage of mortality is found to increase initially with increasing nanoparticle concentration or exposure time and is finally found to saturate for higher concentrations or exposure times. Mortality is found to be higher for smaller particles. Hopping frequency and heart rate are also found to increase with increasing nanoparticle exposure time for a fixed nanoparticle concentration. These observations can be attributed to the enhanced surface photooxidation property of the ZnS nanoparticles. Thus the present study will help people to understand the hitherto unknown harmful impact of ZnS nanoparticles on aquatic organisms in the western part of West Bengal (Bankura and Purulia districts), India.
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I. Korsunskiy, Vladimir, Reinhard B. Neder, Andreas Hofmann, Sofia Dembski, Christina Graf, and Eckart Rühl. "Aspects of the modelling of the radial distribution function for small nanoparticles." Journal of Applied Crystallography 40, no. 6 (November 10, 2007): 975–85. http://dx.doi.org/10.1107/s0021889807038174.

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An approach to modelling radial distribution functions (RDFs) of nanoparticle samples over a wide range of interatomic distances is presented. Two different types of contribution to the model RDF are calculated. The first explicitly reflects the structure of the nanoparticle parts with more or less crystalline atomic structure. It can be calculated precisely and contains comparatively sharp peaks, which are produced by the set of discrete interatomic distances. The second includes RDF contributions from distances between weakly correlated atoms positioned within different nanoparticles or within different parts of a nanoparticle model. The calculation is performed using the approximation of a uniform distribution of atoms and utilizes the ideas of the characteristic functions of the particle shape known in small-angle scattering theory. This second RDF contribution is represented by slowly varying functions of interatomic distancer. The relative magnitude of this essential part of the model RDF increases with increasingrcompared with the part that represents the ordered structure. The method is applied to test several spherical and core/shell models of semiconductor nanoparticles stabilized with organic ligands. The experimental RDFs of ZnSe and CdSe/ZnS nanoparticle samples were obtained by high-energy X-ray diffraction at beamline BW5, HASYLAB, DESY. The ZnSe nanoparticles have a spherical core with approximately 26 Å diameter and zincblende structure. The RDF of the CdSe/ZnS nanoparticle sample shows resolved peaks of the first- and the second-neighbour distances characteristic for CdSe (2.62 and 4.27 Å) and for ZnS (2.33 and 3.86 Å) and for the first time clearly confirms the presence of CdSe and ZnS nanophases in such objects. The diameters of the CdSe and ZnS spherical cores are estimated as 27 and 15 Å. CdSe and ZnS are present in the sample for the most part as independent nanoparticles. A smaller amount of ZnS forms an irregularly shaped shell around the CdSe cores, which consists of small independently oriented ZnS particles.
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Vasan, R., F. Gao, M. O. Manasreh, and C. D. Heyes. "Investigation of charge transport between nickel oxide nanoparticles and CdSe/ZnS alloyed nanocrystals." MRS Advances 2, no. 51 (2017): 2935–41. http://dx.doi.org/10.1557/adv.2017.488.

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ABSTRACTCharge transport between nickel oxide nanoparticles and CdSe/ZnS alloyed core/shell nanocrystals is investigated. The crystal structure and composition of the nickel oxide nanoparticles are evaluated using X-ray diffraction, Raman and X-ray photoelectron spectroscopies. The nanoparticles are near-stoichiometric with very low defect densities. The optical properties of the materials are studied by measuring the absorbance and time resolved photoluminescence spectra. The band gap of the nickel oxide nanoparticles is around 4.42 eV. The CdSe/ZnS nanocrystals exhibit shorter average lifetimes when mixed with nickel oxide nanoparticle powder. The lifetime quenching can be attributed to the efficient charge transport from the CdSe/ZnS nanocrystals to nickel oxide nanoparticles due to the relative valence band alignment.
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Sunatkari, Swarnalata. "Study of structural and spectroscopic characterization of co-doped ZnS Nanoparticles capped with L-Arginine." Journal of Physics: Conference Series 2426, no. 1 (February 1, 2023): 012036. http://dx.doi.org/10.1088/1742-6596/2426/1/012036.

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Abstract The aim of the present study was to prepare ZnS nanoparticles co-doped with Li+-Cs+, were synthesized using a chemical co-precipitation method. The ZnS-(Li+-Cs+) nanoparticle’s were capped with L- Arginine and reduced using sodium sulphide. The main advantage of this method is to synthesized semiconductor nanomaterial with wide band gap and nanoparticles are chemically stable over a long time. The as prepared nanoparticles were characterised by X-Ray Diffraction technique for phase analysis of the sample. Particle size is found in the range of 2 to 4 nm calculated by Debye Scherer method. XRD confirms the evolution of stable cubic zinc blend phase of ZnS nanoparticles. The strong interaction between the capping agent L- arginine, Zn and S is revealed from the Fourier Transform Infrared (FTIR) spectrum.
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Rai, S., and R. Kothari. "Synthesis and Spectroscopic Characterization of Zinc Sulphide nanoparticles using Microwave irradiation of Zinc complex of Thiosemicarbazone ligand as a Single Molecular precursor : Pharmacological activities." Digest Journal of Nanomaterials and Biostructures 18, no. 1 (January 2023): 31–45. http://dx.doi.org/10.15251/djnb.2023.181.31.

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Single molecular precursors are appropriate starting materials for synthesis of semiconductor nanoparticles (NPs), which allow for the control of atomic ratio, monodispersity, composition and particle size of nanoscaled metallic sulfide nanoparticles. In the present study, we have reported the synthesis of nanostructured chalcogenides pharmacologically active active zinc sulfide nanoparticles (ZnS NPs) using Zn (II) ion inserted thiosemicarbazone ligand as a single molecular precursor .The precursors were thermally pyrolysized using high energy microwave radiations to obtain very fine ZnS nanoparticles. In this synthesis, we use DMSO as a nonpolar solvent for the synthesis of all compounds. The heating of Zinc complex in the non- aqueous environment of DMSO plays a very crucial role in decreasing reaction time, reducing the chances of side reactions and proper conversion of Zn complex into ZnS nanoparticles. In this reaction Zn complex of thiosemicarbazone ligand provides both Zn2+ and S2- ions for synthesis of ZnS nanoparticles. The microwave synthesis of ZnS NPs from Zn complex is a very simple, fast, highly effective, efficient and low cost method. All synthesized compounds were characterized by various structural, electronic, vibrational, optical, morphological and pharmacological characterizations. The prepared ZnS NPs were found to crystallize in cubic phase, which generally forms at low temperatures, with the dimensions dependent upon the molar ratio of molecular precursors used. Synthesized ZnS nanomaterials had surface sulfur vacancies that extend their absorption spectra towards the visible region and decreased the bond gap. This allowed ZnS nanoparticles to demonstrate various pharmacological activities like antibacterial, antioxidant and anti-inflammatory activities under normal conditions. Powered X-ray diffraction studies confirms the formation of well -defined equispaced crystalline ZnS NPS. TEM and FE SEM microscopic studies confirmed the elongated tubules structure of ZnS NPs with an average particle size of 60 nm. Sharpe electronic absorption band at 390 nm indicates the synthesis of good quality ZnS NPs. The FT-IR spectral studies confirmed the presence of Zn-S stretching, N-H bending and C=N stretching, vibrations in molecular precursor as Zn(II) complex. The thermal analysis of molecular precursor was performed to investigate the thermal stability of zinc complex. The Zn complex was stable up-to 3800 c. All synthesized compounds demonstrated excellent pharmacological activities like antibacterial, antioxidant and antiinflammatory activities as compared to standards used in analysis of compounds. The microwave synthesis of ZnS nanoparticles via single molecular precursor in proper stoichiometric ratios is an excellent and an efficient method for synthesizing highly effective bioactive agents which can be considered as good drug candidate for the treatment of various diseases in future
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Dissertations / Theses on the topic "ZnS nanoparticles"

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Curcio, Ana Laura [UNESP]. "Síntese e caracterização de materiais semicondutores nanoestruturados luminescentes à base de ZnS." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/138154.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Nanocristais tem sido extensivamente investigados nos últimos anos devido à sua ampla gama de aplicações em vários dispositivos tais como sensores, células solares, lasers, fotocatalisadores, fotodetectores, detectores de infravermelhos, diodos emissores de luz, materiais eletroluminescentes e outros materiais emissores de luz. Semicondutores nanocristalinos apresentam propriedades eletrônicas intermediárias entre aqueles de estrutura molecular e sólidos macrocristalinos, proporcionando uma ampla gama de aplicações. Entre estes materiais, o sulfeto de zinco (ZnS) puro ou dopado tem recebido notável atenção por causa de suas propriedades estruturais ópticas, versatilidade e potencial para várias aplicações tecnológicas. O ZnS é um típico semicondutor II-VI, com um gap direto de 3,6 eV à temperatura ambiente e aproximadamente 40 meV de energia de gap, sendo um bom material luminescente utilizado em telas, sensores e lasers. Como material de gap largo, o ZnS pode facilmente hospedar diferentes metais de transição como centros luminescentes. Entre estes íons de metais de transição para estruturas dopadas, os íons Cu2+e Mn2+ são atraentes pelas emissões de luz características e por apresentarem propriedades eficientes para aplicações como luminóforos. A inserção desses íons na estrutura do ZnS proporcionam defeitos que resultam em emissão no verde para os íons Cu2+e emissão no laranja para os íons Mn2+. Neste estudo, as amostras de ZnS pura e dopadas com Cu2+ e Mn2+ foram preparados pelo método solvotermal, que demonstra ser um processo eficaz para preparar nanopartículas. Uma vez preparadas, as estruturas das amostras nanoestruturadas foram caracterizadas e correlacionada s com propriedades fotoluminescentes. Os resultados de difração de raios X mostram que as amostras de ZnS foram cristalizadas completamente sem a presença de fases secundárias e os difratogramas correspondem à estrutura blenda cúbica de zinco com grupo espacial F-43m. Os espectros de XANES (X-ray Absorption Near Edge Structure) teóricos e experimentais na borda K do Zn indicam que a incorporação de átomos de Mn na matriz ZnS causam a formação de vacâncias de Zn e S, a qual é confirmada por ajustes de espectros EXAFS (Extended X-ray Absorption Fine Structure). Estas vacâncias estão relacionadas com um desvio para o vermelho observado no pico do espectro de fotoluminescência devido a adição de Mn na estrutura do ZnS. Para o ZnS puro, o pico é centrado em ~ 504 nm, relativo as vacâncias de S na amostra nanoestruturada. À medida que se aumenta a porcentagem de Mn na matriz ZnS, uma emissão no amarelo-laranja centrada em ~ 590 nm pode ser observada, associada com a transição 4T1-6A1 no interior de níveis 3d de Mn2+. A adição de íons Cu2+ ao ZnS resulta em um alargamento no pico do espectro de fotoluminescência decorrente de emissão no azul-verde, que está relacionada a recombinação de elétrons de níveis de defeitos mais profundos dos estados t2 do Cu próximos da banda de valência.
Nanocrystals has been extensively investigated in recent years due to its wide range of applications in various devices light emitting materials such as sensors, solar cells, lasers, photocatalysts, photodetectors, IR detectors, light emitting diodes and others. Nanocrystalline Semiconductors have electronic properties between those intermediate molecular macrocristalinos and solid structure, providing a wide range of applications. Among these materials, zinc sulfide (ZnS) pure or doped has received considerable attention because of its optical structural properties, versatility and potential for several technological applications. The ZnS is a typical II-VI semiconductor with a direct band gap of 3.6 eV at room temperature and about 40 meV in energy gap, and a good luminescent material for constrution of displays, lasers and sensors. As wide band gap material, ZnS can easily host different transition metals as luminescent centers. Among these ions of transition metal doped structures, Cu2+ and Mn2+ ions are attractive for light emission characteristics and for having effective properties for applications such as phosphors. The addition of these ions in ZnS structure provide defects that result in emission in the green for the Cu2+ ions and emission in orange for the Mn2+ ions. In this study, samples of pure ZnS and doped with Cu2+ and Mn2+ ions were prepared by solvotermal method, which demonstrate to be an effective process for preparing nanoparticles. Once prepared, the structures of the nanostructured samples were characterized and correlated with photoluminescent properties. The results of X-ray diffraction showed that the ZnS samples were completely crystallized without the presence of secondary phases and XRD patterns correspond to the structure of zinc blende to cubic space group F-43m. spectra XANES (X-ray Absorption Near Edge Structure) theoretical and experimental in the Zn K edge indicates that the inclusion of Mn atoms in the ZnS matrix cause the formation of Zn and S vacancies, which is confirmed by spectral adjustments EXAFS (Extended X-ray Absorption Fine Structure). These vacancies are associated with a red shift observed in the photoluminescence spectrum peak due to the addition of Mn in ZnS structure. For pure ZnS, the peak is centered at ~ 504 nm concerning the vacancies in the S nanostructured sample. As it increases the percentage of Mn in the ZnS matrix, in yellow-orange emission centered at ~ 590 nm can be observed, associated with the transition 4 T1- 6A1 inside 3d levels of Mn2+. Adding Cu2+ to the ZnS results in a broadening of the peak of the photoluminescence spectrum due to emission in blue-green, which is related to recombination deeper defect levels of electrons of t2 Cu states near the valence band.
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Raevskaya, Alexandra, Oksana Rosovik, Andriy Kozytskiy, Oleksandr Stroyuk, Volodymyr Dzhagan, and Dietrich R. T. Zahn. "Non-stoichiometric Cu–In–S@ZnS nanoparticles produced in aqueous solutions as light harvesters for liquid-junction photoelectrochemical solar cells." Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-220126.

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A direct “green” aqueous synthesis of mercapto acetate-stabilized copper indium sulfide (CIS) nanoparticles (NPs) and core/shell CIS@ZnS NPs of a varied composition under ambient conditions and a temperature lower than 100 °C is reported. The CIS@ZnS NPs can be anchored to the surface of nanocrystalline FTO/TiO2 films without additional purification or ligand exchange steps yielding visible-light-sensitive heterostructures ready for using as photoanodes in the liquid-junction solar cells. The highest photoelectrochemical activity in a three-electrode cell was demonstrated by a TiO2/CIS@ZnS heterostructure with atomic Cu : In : S and Zn : Cu ratios of 1 : 5 : 10 and 1 : 1. The optimized TiO2/CIS@ZnS photoanodes were tested in two-electrode solar cells with aqueous polysulfide electrolyte and TiO2/Cu2S heterostructures produced by a photo-assisted method as counter-electrodes. Under illumination by a 30 mW cm−2 xenon lamp, the optimized cells showed the average light conversion efficiency of 8.15%, the average open-circuit voltage of −0.6 V and the average fill factor of 0.42. The cells revealed excellent stability and reproducibility of photoelectrochemical parameters with around one percent variation of the light conversion efficiency around an average value for six identical solar cells
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Junior, João Batista Souza. "Síntese de nanoestruturas core/shell de Co/Au magnetoplasmônica e pontos quânticos de CdSe/ZnS." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-28072017-170738/.

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Nanomateriais apresentam propriedades ajustáveis pelo seu tamanho e forma, como o fenômeno de superparamagnetismo em nanopartículas magnéticas ou o confinamento quântico dos portadores de carga em pontos quânticos (quantum dots). Assim, a síntese de nanopartículas esféricas monodispersas torna-se um fator extremamente importante, haja visto que tais propriedades podem ser ajustáveis para diferentes aplicações na área de tecnologia e biomedicina. Nanopartículas magnéticas e quantum dots podem ser apontados como promissores materiais para diagnóstico e terapia de neoplasias (câncer), e o desenvolvimento desses sistemas busca, atualmente, intensificar a magnetização e a eficiência de emissão, respectivamente, relativo às propriedades magnéticas e ópticas, além de outros requisitos. Neste trabalho, nanopartículas esféricas de cobalto metálico foram sintetizadas com diâmetro médio de 5,3 nm e desvio padrão de 0,4 nm, distribuição de tamanhos lognormal. A equação de Langevin modificada pelo modelo de partículas interagentes foi utilizada no ajuste da curva de magnetização M(H) para obtenção do diâmetro magnético médio e desvio padrão, 4,7 nm e 1,0 nm, respectivamente. Comparando os dois diâmetros, encontra-se uma camada morta de magnetização de aproximadamente 3,0 Å a qual, praticamente, não contribui para a magnetização da amostra, sendo a magnetização de saturação de 125 emu g-1. Nanoestruturas core/shell de Co/Au apresentaram a propriedade de ressonância plamon de superfície, uma propriedade adicional também desejada para aplicações biomédicas, sendo este sistema denominado magnetoplasmônico. Quantum dots de CdSe foram sintetizados como elevado controle de tamanho e forma. Utilizando rotas de síntese diferentes dos clássicos procedimentos denominados TOP-TOPO, e dióxido de selênio como precursor, estudos mostraram que na presença de um agente redutor no meio de reação e do solvente 1-octadeceno, as amostras apresentaram melhores propriedades óticas. A estrutura cristalina das amostras de CdSe corresponde à formação da fase blenda de zinco, diferentemente das sínteses TOP-TOPO que levam à formação da fase hexagonal wurtzita. A cinética de crescimento dos quantum dots de CdSe também foram avaliadas através de alíquotas retiras com o tempo de reação mostrando um crescimento exponencial do diâmetro das partículas, como previsto pelas teorias de nucleação e crescimento. Estudos por microscopia de fluorescência mostraram que os quantum dots apresentaram o comportamento de intermitência de fluorescência relatado na literatura como um dos fatores que levam a uma diminuição do rendimento quântico de fluorescência. Nanoestruturas core/shell de CdSe/ZnS foram obtidas com elevado controle da espessura da camada de recobrimento e a intensificação das propriedades de fotoluminescência foram mostradas. Os objetivos do trabalho foram alcançados com sucesso, onde foi possível observar a estabilização e a intensificação da magnetização da fase de cobalto metálico, pouco relatado na literatura. Ainda, foi possível conferir maior estabilidade química, versatilidade de funcionalização da superfície e uma segunda propriedade de ressonância plasmônica com o recobrimento com ouro, sem grande prejuízo da propriedade magnética. Em relação aos sistemas ópticos, os semicondutores de CdSe foram obtidos por nova rota de síntese com expressivo controle de tamanho e forma, recobertos com ZnS intensificando as propriedades ópticas do sistema. 
Nanomaterials properties are size- and shape-controlled, such as the superparamagnetism phenomenon of magnetic nanoparticles or the quantum confinement of charge carriers of quantum dots. Therefore, synthesis of monodisperse spherical nanoparticles became extremely important over the past few deacades, since nanoparticles can be used for plenty of applications in technology and biomedicine. Magnetic nanoparticles and quantum dots are promising materials for diagnosis and therapy of cancer. Spherical nanoparticles of metallic cobalt were synthesized with mean diameter of 5,3 nm and standard deviation of 0,4 nm, lognormal distribution. A modified Langevin equation using the interacting superparamagnetic model was used to fit magnetization curves obtaining the mean magnetic diameter and standard deviation, 4,7 nm and 1,0 nm, respectively. The difference between these two diameters was assigned to the magnetic dead layer (∼3.0 Å), which does not contribute to the sample magnetization, being the saturation magnetization of cobalt nanoparticles around 125 emu g-1. Co/Au core/shell nanostructures were synthesized and the surface plasmon ressonance property was observed, an additional property also desired for biomedical applications, being the Co/Au core/shell system called magnetoplasmonic. CdSe quantum dots were synthesized with high size- and shape-controlled. Using different synthetic routes from the classic TOP-TOPO synthesis, and selenium dioxide as a precursor, the results show that and reducing agent is necessary and 1-octadecene solvent leads to better optical properties. CdSe samples showed a zinc blend (cubic phase) crystal structure, different from TOP-TOPO syntheses that leads to wurtzite structure (hexagonal phase). The growth kinetics of CdSe particles were also evaluated through aliquots from reaction showing exponential growth of particles diameter, as predicted on the theory of nucleation and growth. Fluorescence microscopy studies showed that quantum dots exhibited fluorescence intermittence behavior already reported in the literature as one fo the reasons for the quantum yield decrease. CdSe/ZnS core/shell nanostructures were obtained with high control of the coating layer thickness and the increase of the photoluminescence properties were shown.
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Stroh, Albrecht. "Bildgebung von magnetisch markierten Stammzellen in experimentellen Krankheitsmodellen des ZNS mittels zellulärer Magnetresonanztomographie." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2006. http://dx.doi.org/10.18452/15534.

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Die vorliegende Arbeit beschäftigt sich mit der Bildgebung magnetisch markierter Stammzellen im ZNS mittels Magnetresonanztomographie. Dazu wurden Stammzellen mit Eisenoxidnanopartikeln (VSOP, very small superparamagnetic iron-oxide particles) in vitro effizient und ohne zusätzliche Lipofektionsagenzien magnetisch markiert. Es zeigte sich keine wesentliche Beeinflussung der Vitalität, Proliferation und Differenzierungsfähigkeit sämtlicher untersuchter Zellpopulationen. Zur Evaluierung der Grenzen der zellulären MR-Bildgebung wurde das Detektionslimit magnetisch markierter embryonaler Stammzellen in vivo nach intrastriataler Injektion im Gehirn der Ratte untersucht. Es ließen sich bei einer Feldstärke von 17,6 T weniger als 100 magnetisch markierte Zellen sicher vom Hirnparenchym abgrenzen. Die histologische Korrelation bestätigte den zellulären Ursprung der beobachteten T2*-Hypointensitäten. In einem Rattenmodel des Morbus Parkinson konnte eine spezifische Detektion der intrastriatal injizierten magnetisch markierten embryonalen Stammzellen über einen Zeitraum von 6 Monaten erreicht werden. Es konnte keine signifikante Migration der Zellen festgestellt werden, jedoch fanden sich große interindividuelle Unterschiede in ihrer räumlichen Verteilung. In der histologische Analyse stellten sich auch sechs Monate nach der Transplantation im Bereich des Stichkanals eisenoxidmarkierte Stammzellen dar. In einem Mausmodell der cerebralen Ischämie wurde erstmals die Anreicherung systemisch injizierter magnetisch markierter mononukleärer Zellen kernspintomographisch erfasst. 24 - 48 h nach der Injektion magnetisch markierter Zellen stellten sich T2*-gewichtete Signalhypointensitäten im Randbereich der Ischämie dar. Insgesamt zeigte sich in dieser Studie die zelluläre Magnetresonanztomographie zu einem nicht-invasiven Nachweis einer geringen Anzahl magnetisch markierter Zellen über einen langen Zeitraum mit hoher Sensitivität in der Lage.
This thesis is dealing with the imaging of magnetically labeled stem cells in the CNS using magnetic resonance imaging (MRI). Stem cells were efficiently magnetically labeled with very small superparamagnetic iron-oxide particles (VSOP), without any lipofection agents. No significant impact on vitality, proliferation and ability to differentiate could be observed after the magnetic labeling of all cell populations investigated. Magnetically labeled embryonic stem cells were injected into the striatum of rats to evaluate their detection limit by MRI. At field strengths of 17.6 T, less than 100 cells could be discriminated from the brain parenchyma as T2*-weighted hypointensities. Histology proved the cellular origin of MRI-signal changes. In a rat model of Parkinsons’s Disease, magnetically labeled embryonic stem cells could be detected by MRI after intrastriatal injection for a time period of more than 6 months. No significant migration of transplanted cells could be observed, however significant inter-individual differences concerning the spatial distribution of cells could be found. Histologically, transplanted iron-oxide-labeled cells could still be detected in the vicinity of the injection tract six months after transplantation. In a mouse model of cerebral ischemia, the enrichment of systemically injected magnetically labeled mononuclear cells was detected non-invasively by MRI. 24 to 48 hours after injection of magnetically labeled cells, T2*-weighted hypointense signal changes could be observed in the border zone of the ischemia. Over all, this study showed that cellular MRI is capable of the sensitive non-invasive detection of small numbers of magnetically labeled cells over a long period of time.
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Dengo, Nicola. "Ligand-free water-based approaches for the synthesis of metal sulfides nanostructures." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3424863.

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In this Thesis, metal sulfides were synthesized through water-based and ligand-free synthetic routes. A simple batch approach was successfully employed for the synthesis of ZnS, CuS, PbS, MnS and Ag2S in a crystalline form at a temperature near 0 °C without employing ligands or stabilizing agents. Particles dimension, crystal structure, surface composition and susceptibility to oxidation phenomena of these materials were assessed. In the case of the batch synthesis of ZnS, a SAXS (Small Angle X-Ray Scattering) in-situ study was also performed to elucidate the dimensional evolution of the obtained NPs (nanoparticles) as function of time. Moreover, for ZnS, the behavior in water suspension and the interaction with probe molecules at the liquid/solid interface were also assessed. Microfluidic and CHFS (Continuous Flow Hydrothermal Synthesis) approaches were employed for the synthesis of pure and doped ZnS NPs. In the case of the pure samples, the synthesis conditions were varied in order to gain insights on the growth mechanism of the NPs and to analyze the potential over the control of dimensional and structural properties of the samples. For the doped samples, the uptake of dopants was determined and their inclusion in the ZnS matrix discussed. The functional properties of selected samples were assessed. In particular, the catalytic activity for the HER (Hydrogen Evolution Reaction) was studied for pure ZnS NPs, while PL (Photoluminescence) was measured in the doped ones. Cytotoxicity assays on doped ZnS NPs obtained with the microfluidic route were also performed in view of bioimaging applications. The effect of thermal treatment and oxidation phenomena on ZnS NPs as a function of the NPs size was also in-depth analyzed. The study addressed the variations of size, morphology, structure, composition of the nanostructures and their effect on the photocatalytic activity. The characterization strategy relied on the complementary use of different techniques. XRD (X-Ray Diffraction) and TEM (Transmission Electron Microscopy) analyses were performed to assess mainly dimensional and structural features of the materials, while the surface composition was analyzed combining XPS (X-ray Photoelectron Spectroscopy) and FTIR (Fourier Transform Infrared Spectroscopy). The characterization of the materials was also complemented by Raman spectroscopy. The results showed the potential of the proposed methods to control relevant features of different materials, even without the use of stabilizing agents, and allowed to assess the surface chemistry of the synthesized naked particles.
In questa tesi sono stati sintetizzati solfuri metallici utilizzando metodi in soluzione acquosa che non prevedono l’uso di leganti. In particolare, ZnS, CuS, PbS, MnS e Ag2S sono stati ottenuti in forma cristallina ad una temperatura prossima a 0 °C e senza l’uso di leganti mediante un semplice metodo batch. Sono stati studiati la dimensione, la struttura cristallina, la composizione e i fenomeni di ossidazione delle particelle ottenute. È inoltre stato eseguito uno studio SAXS (Small Angle X-Ray Scattering) in-situ risolto nel tempo relativo alla sintesi di ZnS per valutarne la crescita nella miscela di reazione durante la sintesi batch. Sono inoltre stati studiati il comportamento in sospensione acquosa di particelle di ZnS e la loro interazione con sonde molecolari all’interfaccia liquido/solido. La sintesi di nanoparticelle di ZnS pure e drogate è stata eseguita mediante un metodo microfluidico ed uno CHFS (Continuous Flow Hydrothermal Synthesis). Nel caso di ZnS puro, le condizioni di sintesi sono state variate per ottenere informazioni sul meccanismo di formazione del materiale e valutare le potenzialità dei metodi utilizzati per controllare le proprietà dimensionali e strutturali delle nanoparticelle. Nel caso di ZnS drogato, l’incorporazione dei droganti nel materiale è stata quantificata e discussa. Le proprietà funzionali di alcuni campioni selezionati sono state studiate. Nel caso di ZnS puro è stata quantificata l’attività fotocatalitica per la HER (Hydrogen Evolution Reaction), mentre per il materiale drogato sono state misurate le proprietà di fotoluminescenza. È inoltre stata determinata la citotossicità di alcuni campioni ottenuti per via microfluidica in vista di potenziali applicazioni nella diagnostica per immagini. È stato eseguito uno studio approfondito sull’effetto di trattamenti termici e fenomeni di ossidazione sulle proprietà dimensionali, morfologiche, strutturali e composizionali delle nanostrutture e sui loro effetti sulla di attività fotocatalitica di nanoparticelle di ZnS di diversa dimensione. La strategia di caratterizzazione si è basata sull’uso complementare di tecniche diverse, quali l’XRD (X-Ray Diffraction) e la microscopia TEM (Transmission Electron Microscopy) per lo studio di proprietà dimensionali e strutturali, mentre XPS (X-ray Photoelectron Spectroscopy) e FTIR (Fourier Transform Infrared Spectroscopy) sono state usate per la determinazione della composizione superficiale. La caratterizzazione dei campioni è stata completata dalla spettroscopia Raman. I risultati ottenuti hanno mostrato la potenzialità dei metodi di sintesi proposti nell’ottenere il controllo di importanti proprietà dei materiali senza sfruttare l’uso di leganti superficiali, e hanno consentito lo studio della chimica della superficie esposta delle nanoparticelle sintetizzate.
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Brayek, Amine. "Etude des propriétés photo-électrochimiques des structures cœur-coquille ZnO/ZnS électrodéposées sur verre-ITO." Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC075.

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Les structures à hétérojonction attirent beaucoup d'attention à l'amélioration de l'injection d'électrons à travers l'interface. L'hétérojonction unidimensionnelle ZnS@ZnO est synthétisée sur des substrats conducteurs de verre d'une manière contrôlée, au moyen d'un dépôt électrochimique simple en deux étapes et d'une sulfuration chimique de nanofil de ZnO comme matrice réactive. Les propriétés photoélectrochimiques (PEC) des hétérostructures résultantes ont été mesurées, en utilisant une cellule électrochimique éclairée par une lampe au xénon standard. Les réseaux de nanofils ZnO@ZnS core-shell comme préparé sont trouvés plus efficace pour améliorer significativement la densité de photocourant pour la photoelectrolyse de l'eau comparées aux réseaux de nanofils de ZnO. Ceci est principalement dû à la faible densité de lacunes d'oxygène et d'autres défauts structuraux. La structure électronique particulière dans l'hétérojonction a permis de réduire la hauteur de la barrière énergétique à l'interface et la séparation des porteurs photo-générés est donc améliorée. Ainsi, la performance photoélectrochimique a été fortement améliorée et une densité de photocourant de 0,6 mAcm-2 à 0,6 V (par rapport à Ag/AgC1) a été obtenue. Par conséquent, notre structure proposée est un candidat prometteur comme photoanode pour les dispositifs de conversion de l'énergie en hydrogène
Heterojunction structures are attracting lots of attention for enhancing the electron injection across the interface. ZnO@ZnS one-dimensional heterojunction films are synthesized on conducting glass substrates in a controlled way, using a simple two-step electrochemical deposition and a chemical sulfurization of ZnO nanowire array as reactive template. The photoelectrochemical (PEC) properties of the resulting hétérostructures were measured, using a homemade electrochemical tell illuminated with a standard Xenon lamp. The as-prepared ZnO@ZnS core—shell nanowire arrays are found to exhibit significantly enhanced photocurrent density for water splitting as compared to ZnO nanowire arrays. This is mainly due to the lower density of oxygen vacancies and other defects states. The special electron structure in the heterojunction helped to reduce the energy barrier height at the interface and enhanced the separation of photo-generated carriers. Thus, the photoelectrochemical performance was highly improved, and a photocurrent density of 0. 6 mAcm-2 at 0. 6 V (vs. Ag/AgC1) was obtained. Hence, our proposed structure is a promising candidate as a photoanode for solar energy-to-hydrogen conversion devices
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Zobel, Mirijam [Verfasser], and Reinhard [Akademischer Betreuer] Neder. "Nanoparticle crystallization and solvent interface restructuring especially for ZnO nanoparticles in organic solvents / Mirijam Zobel. Gutachter: Reinhard Neder." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2016. http://d-nb.info/1081544090/34.

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Sandner, Julian Christoph. "Die toxikologische Relevanz der Zn2+-Freisetzung bei der Degradation von ZnO-Nanopartikeln." Doctoral thesis, Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-211704.

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Nanoobjekte werden als eines der meist untersuchten Forschungsgebiete unserer Zeit immer beliebter in der Industrie, da durch Variation ihrer Strukturen besondere Eigenschaften entlockt werden können, die bei makrokristallinen Kompositionen nicht auftreten. Doch mit Zunahme der Anwendungsbereiche steigt wiederum die Wahrscheinlichkeit einer hohen Exposition, was die toxikologischen Untersuchungen der letzten Jahre bedingte. Allerdings wurden dabei weniger die kausalen Zusammenhänge eruiert. In dieser Arbeit zeigt der Autor die Beziehungen zwischen ZnO-Toxizität und intrazellulärer Zn2+-Konzentrationen auf. Zu diesem Zweck erfolgten Zytotoxizitätsuntersuchungen mittels MTT-Test von ZnO-Nanopartikeln und ZnCl2. Dadurch konnten die toxischen Eigenschaften dieser Agenzien belegt werden. Sowohl Nanopartikel als auch Zn2+ weißen in äquivalenter Gesamtmasse dieselben Toxizitätswerte auf. Nachfolgend wurde die Toxizität I) der Partikel durch Chelatierung der Ionen und II) der freigesetzten Zn2+ durch Abzentrifugieren der Partikel untersucht. Hierbei zeigte sich eine deutlich niedrigere Toxizität der Partikel in Abwesenheit von Zn2+. Hingegen verursachten die partikelfreien Proben allein durch die freigesetzten Zn2+ durchaus vergleichbare Effekte wie die ZnO-Dispersion. Erwähnenswert ist, dass generell eine geringere Toxizität durch FKS-Zugabe vorhanden war. Im Weiteren wurde die intrazelluläre Zn2+-Konzentration in Abhängigkeit der Zinkexposition untersucht. Anhand der Markierung mit dem zinkspezifischen Fluorophor FluoZin-3 erfolgte die quantitative Zn2+-Bestimmung mittels Durchflusszytometrie. Dabei ergab sich ein signifikanter Anstieg der intrazellulären Zn2+-Konzentration, der eine einschneidende Störung der Zinkhomöostase darstellt. Bemerkenswert ist der Anstieg in vitalen Zellen auf ein Vielfaches der Ausgangkonzentration, wobei das Überschreiten von etwa 10 nM zum Übergang in die Nekrose führte. Unabhängig von äußeren Faktoren lagen bei gleichen Toxizitätswerten vergleichbare intrazelluläre Zn2+-Konzentrationen vor. Offenbar gibt es einen direkten Zusammenhang zwischen intrazellulären Zn2+ und der Toxizität. Dieser Sachverhalt kann zur Risikobewertung der Nanopartikel herangezogen werden.
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Pujalte, Igor. "Étude in vitro de la toxicité de nanoparticules métalliques (TiO2, ZnO, CdS) sur la cible rénale." Thesis, Bordeaux 2, 2011. http://www.theses.fr/2011BOR21849/document.

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De nombreuses incertitudes persistent sur la toxicité potentielle des nanoparticules (NPs) et leur devenir dans l’organisme humain. L’objectif de ce travail est de mieux comprendre les mécanismes cytotoxiques induits par des NPs métalliques sur une cible secondaire, représentée par le rein. En effet, les NPs sont susceptibles de franchir les barrières cellulaires, d’être véhiculées par le sang pour se retrouver filtrées par le rein au niveau des cellules glomérulaires et peut-être, réabsorbées au niveau des cellules tubulaires. Cette étude est réalisée in vitro, avec des NPs métalliques de titane (TiO2 : 12 nm), de zinc (ZnO : 75 nm) et de cadmium (CdS : 8 nm), sur cellules mésangiales (IP15) et cellules épithéliales tubulaires (HK-2). Les résultats démontrent des effets variables selon le type cellulaire étudié, la nature chimique des NPs et leur solubilité. Si les NPs insolubles de TiO2 (CI50>100 µg/cm²) ne sont que très peu toxiques, les NPs de CdS et de ZnO le sont bien plus du fait de leur solubilité (CI50<7 µg/cm²). La libération de cations métalliques Cd2+ et Zn2+ est à l’origine de cette toxicité. La production d’ERO et la perturbation du statut oxydatif cellulaire (GSH/GSSG) sont corrélées aux effets cytotoxiques des NPs de ZnO et CdS. Une approche moléculaire permet d’identifier les voies de signalisation cellulaire intervenant dans la réponse au stress (translocation nucléaire des facteurs de transcription : Nrf2 et NF-κB). L’internalisation et l’accumulation, des NPs de TiO2 et de CdS, sont responsables de l’induction d’un stress oxydant et d’un effet cytotoxique lors d’exposition sur le long terme
Many uncertainties remain about the potential toxic effect of nanoparticles (NPs), and their becoming in human organism. The aim of this study was to understand the cytotoxic mechanisms induced by metallic NPs, on a secondary target organ, the kidney. NPs were able to cross biological barriers, be carried in blood to kidney cells, on glomerular or tubular cells. This study was performed in vitro, with NPs of titanium (TiO2: 12 nm), zinc (ZnO: 75 nm) and cadmium (CdS: 8 nm), on mesangial IP-15 cells and epithelial HK-2 cells. Results showed effects depending on cell type, chemical nature of NPs and their solubility. TiO2 NPs have no cytotoxic effect (IC50>100µg/cm²), probably due to their insolubility. Exposure to CdS and ZnO NPs lead to cell death (IC50< 7 µg/ cm²). Release of metallic cations Cd2+ and Zn2+ are the main causes of toxicity. ROS production and disruption of oxidative cellular balance (GSH/ GSSG) were correlated to the cytotoxic effects of ZnO and CdS NPs. A molecular approach was used to identify signaling pathways involved in oxidative stress response (nuclear translocation of NF-kappaB and Nrf2).Internalization and accumulation of TiO2 and CdS NPs were responsible of oxidative stress induction and cytotoxic effect on long term exposure
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Norman, Thaddeus Jude. "Optical and structural properties of gold nanoparticle aggregates and Mn 2+, CU 2+, and Ag 1+ doped ZnSe nanoparticles /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2004. http://uclibs.org/PID/11984.

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Books on the topic "ZnS nanoparticles"

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Sam, Dr S. Rinu. Nano-Physics: ZnS Nanoparticles. CSMFL Publications, 2017. http://dx.doi.org/10.19085/csmflpub.978-81-932784-1-3.

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Nano Physics ZnS Nanoparticles. India: CSMFL Publications, 2017.

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Book chapters on the topic "ZnS nanoparticles"

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Sooklal, Kelly, Brian M. Cullum, S. Michael Angel, and Catherine J. Murphy. "The Photophysics of Mn2+ on ZnS Nanoclusters." In Nanoparticles in Solids and Solutions, 455–65. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-015-8771-6_21.

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Puse, Ranjit Kumar, T. Ch Anil Kumar, Diip Mishra, Omprakash B. Pawar, M. K. Valsakumari, and A. Arun Kumar. "ZnS Nanoparticles for High-Performance Supercapacitors." In Materials for Sustainable Energy Storage at the Nanoscale, 349–59. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003355755-29.

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Cambrea, Lee R., Courtney A. Yelton, and Heather A. Meylemans. "ZnS-AgInS2Fluorescent Nanoparticles for Low Level Metal Detection in Water." In ACS Symposium Series, 195–210. Washington, DC: American Chemical Society, 2015. http://dx.doi.org/10.1021/bk-2015-1210.ch010.

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Miguel, Ana Sofia, Christopher Maycock, and Abel Oliva. "Synthesis and Functionalization of CdSe/ZnS QDs Using the Successive Ion Layer Adsorption Reaction and Mercaptopropionic Acid Phase Transfer Methods." In Nanoparticles in Biology and Medicine, 143–55. Totowa, NJ: Humana Press, 2012. http://dx.doi.org/10.1007/978-1-61779-953-2_10.

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Stefan, M., S. V. Nistor, and D. Ghica. "ZnS and ZnO Semiconductor Nanoparticles Doped with Mn2+ Ions. Size Effects Investigated by EPR Spectroscopy." In Size Effects in Nanostructures, 3–27. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-44479-5_1.

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Kole, A. K., and P. Kumbhakar. "Observation of Nonlinear Optical Properties of Chemically Synthesized Cu2+ Doped ZnS Nanoparticles." In Springer Proceedings in Physics, 169–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-34216-5_18.

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Liu, W., J. G. Liang, Y. L. Zhu, H. B. Xu, Z. K. He, and X. L. Yang. "CdSe/ZnS Quantum Dots Loaded Solid Lipid Nanoparticles: Novel Luminescent Nanocomposite Particles." In Materials Science Forum, 170–73. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-995-4.170.

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Lallianmawii and N. Mohondas Singh. "Effect of Eu3+ on the Luminescence and Photocatalytic Properties of ZnS Nanoparticles." In Advances in Sustainability Science and Technology, 13–28. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-4189-6_2.

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Lakhotiya, Harish, Gagandeep, Chetan Saini, Ankit Goyal, K. V. R. Rao, and S. L. Kothari. "Structural and Optical Study of ZnS Nanoparticles Doped with Different Concentration of Co." In Springer Proceedings in Physics, 183–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-34216-5_19.

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Bose, Karthikeyan, Lakshminarasimhan Harini, Thimma Mohan Viswanathan, Krishnan Sundar, and Thandavarayan Kathiresan. "Function of ZnS Nanoparticles on Stress-Mediated Apoptosis in Mouse Retinal Pigment Epithelial Cells." In Biotechnology for Toxicity Remediation and Environmental Sustainability, 267–83. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003312390-9.

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Conference papers on the topic "ZnS nanoparticles"

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Joicy, S., P. Sivakumar, N. Ponpandian, and P. Thangadurai. "ZnO nanorods decorated with ZnS nanoparticles." In NANOFORUM 2014. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4917787.

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Gonzales, Gavin P., Arjun Senthil, Gema J. Alas, Nathan J. Withers, Sergei A. Ivanov, Dale L. Huber, and Marek Osiński. "Synthesis and characterization of colloidal ZnTe/ZnS quantum dots." In Colloidal Nanoparticles for Biomedical Applications XIV, edited by Wolfgang J. Parak and Marek Osiński. SPIE, 2019. http://dx.doi.org/10.1117/12.2515646.

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Kaur, Jagdeep, Manoj Sharma, and O. P. Pandey. "Photocatalytic studies of capped ZnS nanoparticles." In PROCEEDING OF INTERNATIONAL CONFERENCE ON RECENT TRENDS IN APPLIED PHYSICS AND MATERIAL SCIENCE: RAM 2013. AIP, 2013. http://dx.doi.org/10.1063/1.4810110.

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Reymatias, Mark V., Arjun Senthil, Dominic Bosomtwi, Shruti I. Gharde, Gema J. Alas, DeYannah J. Walker, Adreanna G. Rael, et al. "Synthesis and characterization of colloidal CdSexS1-x/ZnS quantum dots." In Colloidal Nanoparticles for Biomedical Applications XV, edited by Marek Osiński and Antonios G. Kanaras. SPIE, 2020. http://dx.doi.org/10.1117/12.2553001.

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Ma, Xiying, Jingwei Song, and Zhangshen Yu. "Observation the Optical Characteristics of ZnS and Mn-Doped ZnS Nanoparticles." In 2012 Symposium on Photonics and Optoelectronics (SOPO 2012). IEEE, 2012. http://dx.doi.org/10.1109/sopo.2012.6271129.

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Virpal, Anita Hastir, Jasmeet Kaur, Gurpreet Singh, and Ravi Chand Singh. "Photoluminescence study of ZnS and ZnS:Pb nanoparticles." In PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON CONDENSED MATTER PHYSICS 2014 (ICCMP 2014). AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4915370.

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SMIJOVÁ, Julie, Pavlína PEIKERTOVÁ, Kateřina MAMULOVÁ KUTLÁKOVÁ, and Jonáš TOKARSKÝ. "Hydrothermal and microwave synthesis of ZnS nanoparticles." In NANOCON 2020. TANGER Ltd., 2020. http://dx.doi.org/10.37904/nanocon.2020.3704.

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Ali, Amani H., Hassan Abd-elhamid Hashem, and Ahmed Elfalaky. "Preparation, Properties, and Characterization of ZnS Nanoparticles." In ASEC 2022. Basel Switzerland: MDPI, 2022. http://dx.doi.org/10.3390/asec2022-13829.

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Hussain, Syed Zajif, Irshad Hussain, Faheem Amin, Nadeem Sabir, and Wahid Qayyum. "Photoluminescence properties of Co and Ni co-doped CdS/ZnS core/shell nanoparticles." In Colloidal Nanoparticles for Biomedical Applications XIII, edited by Xing-Jie Liang, Wolfgang J. Parak, and Marek Osiński. SPIE, 2018. http://dx.doi.org/10.1117/12.2291454.

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Glukhovskoy, Evgeniy, Оksana Shinkarenko, and Anna Kolesnikova. "Control method conductive properties ZnS quantum dots." In Reporters, Markers, Dyes, Nanoparticles, and Molecular Probes for Biomedical Applications X, edited by Samuel Achilefu and Ramesh Raghavachari. SPIE, 2018. http://dx.doi.org/10.1117/12.2284660.

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Reports on the topic "ZnS nanoparticles"

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Scholtes, Kevin T., Christopher B. Jacobs, Eric S. Muckley, Patrick M. Caveney, and Ilia N. Ivanov. Scalable processing of ZnS nanoparticles for high photoluminescence efficiency quantum dots. Office of Scientific and Technical Information (OSTI), November 2018. http://dx.doi.org/10.2172/1482456.

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