Synthesis, characterization, and measurement of structural, optical, and phtotoluminescent properties of zinc sulfide quantum dots

被引：45
作者：
Goharshadi, Elaheh K. [1 ,2 ]
Mehrkhah, Roya [1 ]
Nancarrow, Paul [3 ]
机构：
[1] Ferdowsi Univ Mashhad, Dept Chem, Mashhad 91779, Iran
[2] Ferdowsi Univ Mashhad, Ctr Nano Res, Mashhad 91779, Iran
[3] Queens Univ Belfast, Sch Chem & Chem Engn, Belfast BT7 1NN, Antrim, North Ireland
来源：
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2013年 / 16卷 / 02期
关键词：
Zinc sulfide; Nanoparticle; Semiconductor compounds; Photoluminescence; TEMPERATURE IONIC LIQUIDS; WURTZITE ZNS; MICROWAVE IRRADIATION; NANOCRYSTALLINE ZNS; FORMATION MECHANISM; GREEN SYNTHESIS; NANOPARTICLES; PARTICLES; EXTRACTION; GAMMA;
D O I：
10.1016/j.mssp.2012.09.012
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A facile and rapid microwave irradiation method was developed to prepare ZnS nanoparticles (NPs) using a set of ionic liquids (ILs) based on the bis(trifluoromethylsulfonyl) imide anion and different cations of 1-alkyl-3-methyl-imidazolium. The phases, structures, and optical absorption properties of the NPs were determined in depth with X-ray powder diffraction (XRD), transmission electron microscopy (TEM), Raman spectroscopy, UV-vis absorption spectroscopy (UV-vis), diffuse reflectance spectroscopy (DRS), and photoluminescence spectroscopy (PL). The average crystallite size of the ZnS NPs calculated from the XRD pattern was of the order of 2.8 nm which exhibits cubic zinc blende structure. The energy band gap measurements of NPs were carried out by UV and DRS. The results revealed that the ZnS NPs exhibit strong quantum confinement effect. The optical band gap energy increases significantly compared with those of the bulk ZnS. The refractive indices for different ZnS nanosamples and different concentrations of ZnS NPs for a typical sample suspended in deionized water were also measured. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：356 / 362
页数：7
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