ZnO-templated synthesis of wurtzite-type ZnS and ZnSe nanoparticles

Farah Dawood, Raymond E. Schaak

Research output: Contribution to journalArticle

71 Scopus citations

Abstract

The controllable synthesis of semiconductor nanocrystals is important for exploiting their sizedependent properties in a variety of applications. The important wide-bandgap semiconductors ZnS and ZnSe crystallize in both the zincblende (ZB) and wurtzite (WZ) structures. While the ZB polymorphs are most stable, methods exist for synthesizing the WZtype nanocrystals. However, because of the subtle structural differences between the ZB and WZ structures, subtle synthetic differences can favor one polymorph over the other. It is therefore challenging to predictably generate the WZ polymorphs and understand the factors that play a key role in their formation. Through careful mechanistic studies, we show that ZnO nanoparticles, which adopt the WZ structure, form as intermediates in typical reactions that generate WZ-ZnS. This implies that ZnO nanoparticles can serve as structural templates for the preferential formation of WZ-ZnS nanoparticles, and this is confirmed experimentally. Similar chemistry can be used to preferentially form WZ-ZnSe and ZB-ZnSe.

Original languageEnglish (US)
Pages (from-to)424-425
Number of pages2
JournalJournal of the American Chemical Society
Volume131
Issue number2
DOIs
StatePublished - Jan 21 2009

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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