Bias-voltage-induced decomposition of 2-methyl-1,4-naphthoquinone (MeNQ) dispersed in polystyrene on an Ag/AlOx/Al tunnel junction is examined using IR reflection absorption spectroscopy. Under no bias voltage, IR bands due to MeNQ decrease only slightly. In contrast, when the Ag electrode is biased to - 2.8 eV, which corresponds to the electronic absorption edge of MeNQ, the IR bands of MeNQ are significantly decreased in intensity. Bias voltages of + 2.8 eV and ±1.5 eV promote the band-intensity reduction less. These results reveal that hot holes with appropriate energies promote the decomposition of MeNQ on the tunnel junction.
|Number of pages||4|
|Journal||Applied Physics A: Materials Science and Processing|
|Publication status||Published - 2004 Dec 1|
ASJC Scopus subject areas
- Materials Science(all)