| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1674122 | Thin Solid Films | 2008 | 4 Pages |
Abstract
We investigated scanning tunneling microscope (STM)-induced luminescence from Meso-tetrakis (3,5-di-tertiarybutyl-phenyl) porphyrin (H2TBPP) thin films on various metal substrates (copper, platinum and silver) under ambient conditions. Molecular fluorescence similar to the corresponding photoluminescence was observed from the H2TBPP/Ag and H2TBPP/Pt, but not H2TBPP/Cu, depending on the spectra of the surface plasmons of the substrates. The results support the mechanism that intense molecular fluorescence from porphyrin film on the noble metals is a result of enhancement of molecular excitation by substrate surface plasmons.
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Authors
H.W. Liu, Y. Ie, R. Nishitani, T.Z. Han, Y. Aso, H. Iwasaki,