High quality ZnS and core/shell CdSe/ZnS nanoparticles from air-stable precursors

Shizhong Wang, Jing Zou, Benjamin R. Jarrett, Sungjin Cho, Angelique Y. Louie, Susan M. Kauzlarich

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report the synthesis of high quality ZnS nanoparticles using sulfur and zinc acetate as the S and Zn source, respectively. It was found that sulfur and zinc acetate could be easily dissolved in the mixture of trioctylphosphine oxide (TOPO) and hexadecylamine (HDA) at a temperature of about 65°C and ZnS nanoparticles were generated at temperatures above 150°C. These reactive species of sulfur and zinc were also used for an epitaxial growth of ZnS shell around a CdSe core. The formation of ZnS nanoparticles was confirmed by powder X-ray diffraction (XRD). Particle size and size distribution were studied by transmission electron microscopy (TEM). Optical properties were characterized by a combination of UV-vis and photoluminescence (PL) spectroscopy. The PL quantum yield of the CdSe/ZnS nanoparticles reached about 66% compared with the dye, Rhodamine 6G (R6G). The present synthetic strategy is a "greener" and simpler synthetic scheme due to the use of air-stable and environmentally benign reagents of sulfur and zinc acetate instead of air-sensitive ones such as dimethylzinc and bis(trimethylsilyl) sulfide.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume6096
DOIs
StatePublished - 2006
EventColloidal Quantum Dots for Biomedical Applications - San Jose, CA, United States
Duration: Jan 22 2006Jan 24 2006

Other

OtherColloidal Quantum Dots for Biomedical Applications
CountryUnited States
CitySan Jose, CA
Period1/22/061/24/06

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Keywords

  • Core/shell structure
  • Nanoparticles
  • Optical properties
  • Quantum dots
  • Semiconductor
  • Synthesis

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Wang, S., Zou, J., Jarrett, B. R., Cho, S., Louie, A. Y., & Kauzlarich, S. M. (2006). High quality ZnS and core/shell CdSe/ZnS nanoparticles from air-stable precursors. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 6096). [60960U] https://doi.org/10.1117/12.663346