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- W1487032396 abstract "Structural, optical, and surface potential properties of CdSe nanoparticles (NPs) prepared on ZnS thin-films have been investigated. CdSe NPs/ZnS thin-films with varying CdSe NPs diameters are synthesised by sequential radio frequency magnetron sputtering technique. A blue shift in the optical absorption edge and enhancement in the optical constants are observed with decrease in the nanoparticles size. CdSe NPs/ZnS thin-films show an absorption edge at about 3.5 eV corresponding to ZnS and another size dependent absorption edge in the energy range of 1.74–2.16 eV, corresponding to CdSe NPs. Decrease in photoluminescence (PL) intensity of ZnS film on incorporation of CdSe NPs is observed; however, no distinct emission peaks corresponding to NPs are seen. Multilayered CdSe NPs/ZnS thin-films comprising of six alternating layers show PL signature both due to ZnS and CdSe NPs. Kelvin probe force microscopy (KPFM) studies show that surface potential values of CdSe NPs/ZnS thin-films lie in between that of ZnS (209 meV) and CdSe/ZnS (−4 meV) thin-films, which confirms charge transfer between CdSe NPs and ZnS thin-films. The evolution of CdSe NPs/ZnS nanoscale heterojunction has been observed with shift in the surface potential values by varying size and coverage of CdSe NPs." @default.
- W1487032396 created "2016-06-24" @default.
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- W1487032396 date "2015-06-26" @default.
- W1487032396 modified "2023-10-16" @default.
- W1487032396 title "Spectroscopic ellipsometry, photoluminescence and Kelvin probe force microscopy studies of CdSe nanoparticles dispersed on ZnS thin film" @default.
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- W1487032396 doi "https://doi.org/10.1063/1.4923219" @default.
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