Wurtzite-type ZnS nanoparticles by pulsed electric discharge

Abstract

The synthesis of wurtzite-type ZnS nanoparticles by an electric discharge submerged in molten sulfur is reported. Using a pulsed plasma between two zinc electrodes of diameter 5 mm in molten sulfur, we have synthesized high-temperature phase (wurtzite-type) ZnS nanocrystals with an average size of about 20 nm. The refined lattice parameters of the synthesized wurtzite-type ZnS nanoparticles were found to be larger than those of the reported ZnS (JCPDS card no 36-1450). Synthesis of ZnMgS (solid solution of ZnS and MgS) was achieved by using ZnMg alloys as both cathode and anode electrodes. UV-visible absorption spectroscopy analysis showed that the absorption peak of the as-prepared ZnS sample (319 nm) displays a blue-shift compared to the bulk ZnS (335 nm). Photoluminescence spectra of the samples revealed peaks at 340, 397, 423, 455 and 471 nm, which were related to excitonic emission and stoichiometric defects.

High temperature stable WC1−x@C and TiC@C core–shell nanoparticles by pulsed plasma in liquid

“…11,23 In this paper, we examined the synthesis of high temperature stable WC 12x @C and TiC@C core-shell nanoparticles by a pulsed plasma in liquid method, which recently was applied for the synthesis of Co@C, Ni@C, Fe@C, C 60 , TiO 2 and ZrC nanoparticles. [24][25][26][27] In the following we will describe the synthesis, characterization and properties of the obtained WC 12x @C and TiC@C nanoparticles.…”

Production of Ultrafine Ag Nanoparticles by Laser Ablation in Diluted Sodium Borohydride Solution and Their Antibacterial Properties

“…The desired properties of these NPs are strongly depended on their size and shape [11][12][13]. Therefore, many techniques including physical [14][15][16][17], chemical [18,19] and biological [20][21][22] methods have been developed for the Ultra-fine (< 10 nm) nanoparticles are desirable for higher reactivity with the surrounding media due to their higher surface area to volume ratios. They are, however, difficult to produce.…”

Synthesis of Pd-Fe System Alloy Nanoparticles by Pulsed Plasma in Liquid

“…The short duration (several microseconds) and quenching of the surrounding cool liquid limit the size of the crystals, which enables the synthesis of very small and/or metastable particles. We have synthesized nanoparticles of such materials as single elements [9], carbon-coated metals [10], fullerene [9], and onion-like carbon [11], and compound nanoparticles of oxides, carbides, and sulfides [12,13,14].…”