10.1186/2193-8865-3-61

Effect of mercaptoethanol and Na2S dropwise addition rate on zinc sulfide semiconductor nanocrystals: synthesis and characterization

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  • Abbas Rahdar*1,
  1. Department of Physics, Faculty of Science, University of Zabol, Zabol, IR
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Published in Issue 02-08-2013

How to Cite

Rahdar, A. (2013). Effect of mercaptoethanol and Na2S dropwise addition rate on zinc sulfide semiconductor nanocrystals: synthesis and characterization. Journal of Nanostructure in Chemistry, 3(1 (December 2013). https://doi.org/10.1186/2193-8865-3-61
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Abstract

Abstract Zinc sulfide (ZnS) semiconductor nanocrystals with mercaptoethanol (ME) as a stabilizer (capping agent) were synthesized by coprecipitation method in room temperature using the solution of zinc chloride (ZnCl 2 ) and sodium sulfide (Na 2 S) as starting material. The effect of ME and Na 2 S dropwise addition rate on the preparation of these samples was measured using UV–vis absorption and X-ray diffraction (XRD). The ultraviolet–visible (UV–vis) absorption and XRD of the prepared ZnS nanoparticles show increase of band gap and decrease of particle size with decrease in ME and Na 2 S dropwise addition rate to the reaction medium. This behavior is related to the size quantization effect due to the small size of the particles. The photoluminescence emission peak positions exhibit obvious blue shift from 510 to 455 nm. The particle sizes were obtained from transmission electron microscopy images.

Keywords

  • ZnS,
  • Co-precipitation,
  • Mercaptoethanol,
  • Capping agent,
  • Optical band gap,
  • XRD
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