Scanning tunneling microscope (STM)-excited molecular fluorescence from porphyrin thin films

Hongwen Liu, Ryusuke Nishitani, Yutaka Ie, Tatsuo Yoshinobu, Yoshio Aso, Hiroshi Iwasaki

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13 Citations (Scopus)

Abstract

Scanning tunneling microscope (STM)-excited molecular fluorescence from Meso-tetrakis (3,5-di-tertiarybutyl-phenyl) porphyrin (H2TBPP) thin films with 1-4 nm in thickness on gold (111) and highly oriented pyrolytic graphite (HOPG) surfaces has been respectively investigated in air at room temperature. The thin films of porphyrin were prepared by using spin-casting method. Molecular fluorescence emitted from porphyrin on Au(lll) was observed, in company with plasmon-mediated light emission from gold substrate. No light is observed from porphyrin on HOPG. Mechanisms of such different luminescent properties of the STM junctions are discussed.

Original languageEnglish
Pages (from-to)L566-L569
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume44
Issue number16-19
DOIs
Publication statusPublished - 2005
Externally publishedYes

Keywords

  • Gold
  • HOPG
  • Luminescent property
  • Porphyrin
  • Scanning tunneling microscopy - excited luminescence (STL)

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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