Tunneling electron induced photon emission from monolayered H2TBP porphyrin molecules on Cu( 1 0 0 )

Z. C. Dong, A. S. Trifonov, X. L. Guo, K. Amemiya, S. Yokoyama, T. Kamikado, T. Yamada, S. Mashiko, T. Okamoto

Research output: Contribution to journalConference articlepeer-review

22 Citations (Scopus)


Positioning of a clean scanning tunneling microscope tip above a monolayer of free-base porphyrin (H2TBPP) molecules on Cu(100) is found to induce merely plasmon-mediated emission with molecular fluorescence completely quenched. The molecule acts as a spacer to increase the tip-metal substrate distance to make spectra blue-shifted. Additional broad emissions at low energies may be associated with the molecules either adsorbed onto the tip apex or on the second monolayer and might suggest the involvement of modified molecular fluorescence. In both cases, the energy transfer from molecular excited states to the metal substrate is overwhelmingly dominant, leading to enhanced plasmon-mediated emission.

Original languageEnglish
Pages (from-to)237-243
Number of pages7
JournalSurface Science
Publication statusPublished - Jun 10 2003
Externally publishedYes
EventProceedings of the 7th International Conference on Nanometer - Malmo, Sweden
Duration: Aug 29 2002Aug 31 2002

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry


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