STM Analysis of CytochromecAdsorbed Hetero-LB Film using Bridging Molecules

Ferrocene(1-1′-ferrocene-N-dioctadecyl carboxamide), flavin(7,8-dimethly-10-dodecylisoalloxazine), viologen [N-allyl-N7′-[3-propylamidoN″,N″-di(n-octadecyl)]-4,4′bipyridiumdibromide), and cytochrome c were used as an electron donor (D), sensitize (S), the first electron acceptor (A1), and the second electron acceptor (A2), respectively in fabricating molecular device. Malonic acid or poly-L-aspartic acid were used as a bridging molecule for the adsorption of A2 molecules onto A1 layers. In order to confirm the electron transfer, Scanning tunneling microscopy(STM) investigation was performed.