Nanometre-scale photoelectric characteristics of a molecular device monolayer

We constructed monolayer Langmuir-Blodgett (LB) films using a novel molecul e C37H40O4O4 synthesized by us. This molecule is a long-chain alkyl derivat ive with a dinitrobenzene moiety (acceptor subunit) and a dihydrophenazine moiety (donor subunit) bridged by a methylene group with a constant distanc e and bond angle between the acceptor and donor groups. It behaves as a uni molecular device with control of the potential between the donor and accept or subunits. We transferred the monolayer film onto a Au(111) substrate and measured nanometre-scale electrical characteristics in the dark or in an e vanescent field. Rectifying characteristics and increasing photoconductivit y were observed.