Abstract
Nanocrystalline samples of pristine capped zinc sulphide (ZnS) were synthesized via the sol–gel technique. The nanocrystallinity of the samples was confirmed by the X-ray diffraction technique, where the size of the nanoparticle (NPs) decreases with the increasing of molar concentration (x = 0.01 M, 0.02 M, 0.03 M, 0.04 M.) of capping agent sodium dodecyl sulphate (SDS). The obtained crystallite sizes were found to be in the range 4.6 nm to 2.7 nm. The results were justified by Transmission electron microscopic (TEM) analysis. The Williamson Hall (W–H) analysis revealed the microstrain associated with the particles found to be increased as the capping agent concentration was increased. The optical band gaps of the samples were estimated by using ultraviolet–visible spectroscopic techniques and the band gap values were in the range from 4.18 to 4.61 eV. All the samples showed quantum confinement behaviour compared to bulk sample. Fluorescence (FL) spectra showed five emission peaks at the emission wavelengths around 484, 520, 545, 628, and 694 nm. The FL intensities were proportional to the concentration of capping agent. This tailored fluorescence characteristics of the obtained samples can be utilized in various advanced photonic applications.
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Acknowledgements
The authors are very much thankful for getting partial financial assistance from DST & FIST, Govt. of India (Grant No. SR/FST/PS-II-001/2011). The authors are especially grateful to The Department of Physics, University of Burdwan for providing necessary facilities to carry out the experiments.
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SM contributed towards conceptualization, investigation, methodology, data curation, formal analysis, writing—original draft, and Writing—review & editing. SIA contributed towards investigation, formal analysis, writing—original draft, and writing—review & editing. SP contributed towards investigation and writing—review & editing. ACM contributed towards conceptualization, data curation, investigation, methodology, Writing-original draft, supervision, and writing—review & editing. PG contributed towards formal analysis and writing—review & editing.
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Mandal, S., Ali, S.I., Pramanik, S. et al. Impact of capping agent on microstructural and optoelectronic properties of ZnS nanoparticles. J Mater Sci: Mater Electron 34, 2159 (2023). https://doi.org/10.1007/s10854-023-11604-2
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DOI: https://doi.org/10.1007/s10854-023-11604-2