Journal
CHEMICAL SCIENCE
Volume 3, Issue 10, Pages 3113-3118Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2sc20323e
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Funding
- Singapore Ministry of Education Tier2 [MOE2010-T2-1-017]
- Merlion program
- Universite de Rennes 1
- CNRS
- ANR [ANR-09-JCJC-0025]
- PHC Tournesol FR
- GENCI-CINES and GENCI-IDRIS [2010-80649]
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Photo-modulable molecular transport junctions are developed via on-wire lithography-fabricated nanogaps functionalized with a dithienylethene unit bearing two ruthenium fragments. A reversible and repeatable bi-state conductive switching upon alternate irradiation of UV and visible light can be distinctly observed. Theoretical calculations further suggest that bi-directional isomerization is due to the ruthenium moieties that modulate judiciously the electronic coupling between the photochromic part and the metal electrodes, and that the differences in electronic structure between the two isomers (open and closed states) are responsible for conductivity switching.
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