Abstract
I-V characteristics of isolated porphyrin molecules display a minimum in I/V2 at a characteristic "transition voltage" V m. Fluctuations at the molecular contact effect changes in V m and from repeated measurements both its time development and statistical behavior is determined. This contrasts with the more stable contact over a self-assembled monolayer with parallel conduction through many molecules.
Original language | English |
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Pages (from-to) | 2604-2611 |
Number of pages | 8 |
Journal | Small |
Volume | 6 |
Issue number | 22 |
DOIs | |
Publication status | Published - 22 Nov 2010 |
Keywords
- contact asymmetry
- porphyrins
- scanning tunneling microscopytransition voltage spectroscopy
- single molecules