Strong quantum confinement effects in SnS nanocrystals produced by ultrasound-assisted method
Nanocrystalline SnS powder has been prepared using tin chloride (SnCl2) as a tin ion source and sodium sulfide (Na2S) as a sulfur ion source with the help of ultrasound irradiation at room temperature. The as-synthesized SnS nanoparticles were quantitatively analyzed and characterized in terms of their morphological, structural, and optical properties. The detailed structural and optical properties confirmed the orthorhombic SnS structure and a strongly blue shifted direct band gap (1.74 eV), for synthesized nanoparticles. The measured band gap energy of SnS nanoparticles is in a fairly good agreement with the results of theoretical calculations of exciton energy based on the potential morphing method in the Hartree–Fock approximation.
KeywordsQuantum confinement effect SnS Semiconductor nanoparticles X-ray diffraction Potential morphing method Ultrasound irradiation
The support by the University of Mohaghegh Ardabili, Ardabil, Iran, to carry out this study is gratefully acknowledged. The authors (S. Baskoutas, Z. Zeng and Ch. S. Garoufalis) acknowledge the European Union (European Regional Development Fund-ERDF) and Greek national funds through the Operational Program “Regional Operational Programme” of the National Strategic Reference Framework (NSRF)-Research Funding Program: Support for research, technology and innovation actions in Region of Western Greece (MIS: 312123, D.237.002) for financial supports.
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