Synthesis and optical characterization of polymer-capped nanocrystalline ZnS thin films by chemical process

Maity, R.; Maiti, Uday Narayan; Mitra, M.K.; Chattopadhyay, K.

doi:10.1016/j.physe.2005.11.015

Cited by 62 publications

(34 citation statements)

References 20 publications

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“…The absorption band of M-ZnS:Cu-PVA3 and M-ZnS:Cu-PVA4 thin films shifted towards the lower energy when the PVA increased. The relation between the absorption coefficient α and the energy of photon can be calculated by the following equation [5,6]:…”

Section: Methodsmentioning

confidence: 99%

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Influence of the Capped Polymer on the Optical of ZnS:Cu Nanocrystalline Thin Films

Thi¹,

Vuong²

2012

Comm. in Phys.

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Abstract. The ZnS:Cu nanopowders were synthesized by the wet chemical method with Cu concentrations of 0.1, 0.15, 0.2, 0.3 and 0.4%. The microstructure of samples was investigated by the X-ray diffraction (XRD) measurement. The results show that the prepared samples belong to the Wurtzite structure with the average particle size of about 3-7 nm. The highest luminescence intensity of ZnS:Cu nanopowders corresponds to sample with Cu concentration of 0.2%. To investigate the effect of polyvinylacohol (PVA) on the structure of ZnS:Cu, we have prepared the polyvinylacohol (PVA)-capped ZnS:Cu thin films with a Cu concentration of 0.2% by dip-coating method. The PVA did not affect the microstructure of ZnS nanomaterials. The optical properties of samples were studied by measuring the absorption and the photoluminescence spectra in the wavelength range from 300 nm to 900 nm at room temperature. The value of direct band gap is about 3.8 eV. The dependence of the photoluminescence (PL) spectra of samples on the exciting power density, their time-resolved-luminescence spectra were also investigated.

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Section: Methodsmentioning

confidence: 99%

“…The optical properties of ZnS nanoparticles change considerably when diffusing them into polymer matrix with optimal concentration. These properties can be explained by the quantum confinement effect, the quantum size changed effect and the surface effect of polymercapped nanoparticles [5,6].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Capped Polymer on the Optical of ZnS:Cu Nanocrystalline Thin Films

Thi¹,

Vuong²

2012

Comm. in Phys.

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“…In past decade, semiconductor micro/nanoparticles have been synthesized through various ways including hydrothermal process [15], micro-emulsion method [16], sol-gel method [17], chemical coprecipitation method [18], sonochemical method [19], microwave irradiation [20] and solvothermal method [21] etc. However, these methods normally consist of two or more steps and rigorous conditions, such as high pressure or high temperature, usually are required [15][16]22].…”

Section: Introductionmentioning

confidence: 99%

“…However, these methods normally consist of two or more steps and rigorous conditions, such as high pressure or high temperature, usually are required [15][16]22]. Fabrication of inorganic nanoparticles in solid polymer matrices has attracted considerable interest because, the combination of inorganic particles and polymers provide a simple route for the preparation of stable and processable materialshaving the promising properties of both components [23].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization of ZnS nanoparticles by Coprecipitation method using various capping agents - Photocatalytic activity and Kinetic study

Ayodhya¹

2013

IOSR-JAC

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“…Interestingly, our results showed that 2θ values are almost the same compared to those observed after chemical synthesis of ZnS and/or ZnSe nanoparticles as reported in many studies. [30][31][32][33] Differences observed in 2θ values compared to chemical synthesis may be due to the temperature variation from high temperatures during the chemical synthesis to the lower rat body temperature (about 37°C). In fact, the size uniformity distribution and size average can be affected by a temperature synthesis variation of even less than 1°C, 34 which has also been reported in other studies.…”

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confidence: 99%

Interaction between nanoparticles generated by zinc chloride treatment and oxidative responses in rat liver

Azzouz¹,

Trabelsi²,

Hanini³

et al. 2013

IJN

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The aim of the present study was to investigate the interaction of zinc chloride (3 mg/kg, intraperitoneally [ip]) in rat liver in terms of the biosynthesis of nanoparticles. Zinc treatment increased zinc content in rat liver. Analysis of fluorescence revealed the presence of red fluorescence in the liver following zinc treatment. Interestingly, the co-exposure to zinc (3 mg/kg, ip) and selenium (0.20 mg/L, per os [by mouth]) led to a higher intensity of red fluorescence compared to zinc-treated rats. In addition, X-ray diffraction measurements carried out on liver fractions of zinc-treated rats point to the biosynthesis of zinc sulfide and/or selenide nanocomplexes at nearly 51.60 nm in size. Moreover, co-exposure led to nanocomplexes of about 72.60 nm in size. The interaction of zinc with other mineral elements (S, Se) generates several nanocomplexes, such as ZnS and/or ZnSe. The nanocomplex ZnX could interact directly with enzyme activity or indirectly by the disruption of mineral elements’ bioavailability in cells. Subacute zinc or selenium treatment decreased malondialdehyde levels, indicating a drop in lipid peroxidation. In addition, antioxidant enzyme assays showed that treatment with zinc or co-treatment with zinc and selenium increased the activities of glutathione peroxidase, catalase, and superoxide dismutase. Consequently, zinc complexation with sulfur and/or selenium at nanoscale level could enhance antioxidative responses, which is correlated to the ratio of number of ZnX nanoparticles (X=sulfur or X=selenium) to malondialdehyde level in rat liver.

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Synthesis and optical characterization of polymer-capped nanocrystalline ZnS thin films by chemical process

Cited by 62 publications

References 20 publications

Influence of the Capped Polymer on the Optical of ZnS:Cu Nanocrystalline Thin Films

Influence of the Capped Polymer on the Optical of ZnS:Cu Nanocrystalline Thin Films

Synthesis, Characterization of ZnS nanoparticles by Coprecipitation method using various capping agents - Photocatalytic activity and Kinetic study

Interaction between nanoparticles generated by zinc chloride treatment and oxidative responses in rat liver

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