Characterization of covalently immobilized Q-CdS particles on Au(111) by scanning tunneling microscopy and tunneling spectroscopy with high reproducibility

Masahide Miyake, Hajime Matsumoto, Matsuhiko Nishizawa, Takao Sakata, Hirotaro Mori, Susumu Kuwabata, Hiroshi Yoneyama

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Size-quantized CdS particles (Q-CdS) capped with 2-aminoethanethiol and 2-mercaptoethanesulfonate were prepared by means of the AOT/heptane inverse micelles method. The resulting CdS particles were covalently immobilized in a high dispersion on an Au(111) surface coated previously with a self-assembled monolayer of 3,3′-dithiobis(succinimidyl propionate). The immobilized Q-CdS particles were stable against tip scanning in scanning tunneling microscopy (STM). Tunneling spectroscopy (TS) of a single particle whose size was determined from a STM image allowed successfully the determination of the band-gap energy of the size-quantized particle, and the band-gap value obtained was in agreement with that predicted from the tight-binding approximation.

Original languageEnglish
Pages (from-to)742-746
Number of pages5
JournalLangmuir
Volume13
Issue number4
Publication statusPublished - 1997 Feb 19
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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