Room-Temperature Negative Differential Resistance in Nanoscale Molecular Junctions

摘要

Molecular devices are reported utilizing active self-assembled monolayers containing the nitroamine 2'-amino-4,4'-di (ethynylphenyl)-5'-nitro- (1-benzenethiolate) or the nitro compound 4,4'-di(ethynylphenyl)-2'-nitro-1- (benzenethiolate) as the active components. Both of these compounds have active redox centers. Current voltage measurements of the devices exhibited negative differential resistance at room temperature and an on off peak-to-valley ratio in excess of 1000:1 at low temperature.