Bias voltage-dependent STM-tip-enhanced Raman spectroscopy of benzenethiol-modified gold nanoplates

Yasuhiko Fujita, Noriko Nishizawa Horimoto, Shinji Kajimoto, Hiroshi Fukumura

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We measured tip-enhanced Raman scattering (TERS) and photoluminescence (PL) spectra of benzenethiol-modified gold nanoplates fixed on graphite, by using a gold tip for scanning tunneling microscopy (STM) measurements. With increasing bias voltage between the tip and the nanoplates, the Raman intensities of benzenethiol gradually decreased, while the PL intensities decreased first and then increased. This implied that relatively low bias voltages are suitable for STM-TERS measurements. Both PL mapping and STM images of the nanoplates were simultaneously obtained. The PL mapping images showed that field enhancement by gap-mode plasmons between the tip and the nanoplates depended on their configuration.

Original languageEnglish
Pages (from-to)110-114
Number of pages5
JournalChemical Physics Letters
Volume582
DOIs
Publication statusPublished - 2013
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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