Structural and Optical Properties of Chemically Synthesized ZnS Nanostructures

Abstract

Abstract-In the present work ZnS nanoparticles were synthesized by chemical co-precipitation method at room temperature. The structural properties of ZnS nanoparticles were determined by XRD (X-ray Diffraction), TEM (Tunneling Electron Microscopy) and their optical properties by UV-Visible and PL (Photoluminescence) analyses. XRD analysis showed that sample prepared were the cubic Zinc blende structure with particles' size in the ranges 5nm -12nm. The TEM analysis revealed the formation of ZnS nanoparticles with almost uniform shape and size. In optical characterization the UV_Visible spectra show a large blue shift. In PL analysis, three strong and board emission bands located at 365nm, 400nm and 425nm have been observed. It is well known that the luminescent peak centered at 365nm could be assigned to the UV-excitonic emission and other peaks attributing to the sulfur vacancy.

Boosted UV emission at 349 nm from mesoporous ZnS

“…Even though there is a great interest in the photoluminescence (PL) properties of one-dimensional (1D) ZnS nanostructures, few studies are available in the literature on possible UV emission at room temperature. The reported UV emissions from ZnS are at 365 [11], 322 [12], 333 [13], 375 [14], 374 [15], and 380 nm [16], and these are have fewer applications in device fabrication because of the feeble emission nature. Enhanced optical properties of ZnS nanocrystals are also obtained by using capping agents and surfactants like trioctylphosphine oxide (TOPO) [17], chitosan [18], trioctylphosphine oxide [19], ethylenediamine, dodecylthiol [20], 1-ethyl-3-methylimidazolium ethyl sulphate [21], and didecyldimethylammonium bromide (DDAB) [22] during the synthesis process.…”

SHI irradiation of metal doped zinc sulfide polymer nanocomposites synthesized using micro emulsion method

“…The intensity of this peak increased slightly after ion irradiation, which was insignificant for structural modifications. The prominent peaks observed at 35.35°, 39.44°and 53.73°are attributed to (0 0 2), (1 0 0) and (1 0 3) respectively, these peaks attribute the formation of ZnS nanoparticles and Zn blende structure [3,21]. The shift of the absorption peak towards longer wavelength was observed due to the formation of conjugated system of bonds after ion irradiation [22][23][24].…”

“…ZnS can have two different crystal structures (zinc blende and wurtzite), both of which have the same band gap energy (3.68 eV) and the direct band structure. It is widely used as phosphor in photoluminescence, electroluminescence and optical sensor [3,4]. The large amount of work has been carried out upon the Zn based polystyrene nanocomposites synthesized by different methods in the last decade [5][6][7][8][9][10].…”

Formation of Zn and Pb sulfides in a redox-sensitive modern system due to high atmospheric fallout

“…ZnS is extremely fine-grained when precipitated at ambient conditions. Both laboratory and field studies indicate ZnS particulates dimensions within the range of 2-12 nm (e.g., Huang et al, 2003;Moreau et al, 2004;Castillo et al, 2012;Bodo et al, 2012;Xu et al, 2016).…”