Single-molecule interfacial electron transfer dynamics manipulated by external electric current

Details Single-molecule interfacial electron transfer dynamics manipulated by external electric current Single-molecule interfacial electron transfer dynamics manipulated by external electric current

2011-04-13

arxiv.org/abs/1104.2361v1

Physics

Atomic and Molecular Clusters

6 pages, 6 figures

Scientific paper

Interfacial electron transfer (IET) dynamics in 1,1'-dioctadecyl-3, 3, 3', 3'-tetramethylindodicarbocyanine (DiD) dye molecules / indium tin oxide (ITO) film system have been probed at the ensemble and single-molecule level by recording the change of fluorescence emission intensity. By comparing the difference of the external electric current (EEC) dependence of lifetime and intensity for enambles and single molecules, it is shown that the single-molecule probe can effcienly demonstrate the IET dynamics. The backward electron transfer and electron transfer of ground state induce the single molecules fluorescence quenching when an EEC is applied to ITO film.

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