Resolving Electron Transfer Kinetics at the Nanocrystal/Solution Interface

摘要

Controlling the rate of charge transfer through molecular films is of both fundamental and technological interest with relevance to areas such as sensor design and molecular electronics.While electron transfer(ET)kinetics across self-assembled monolayers(SAMs)formed on macroscopic gold surfaces have been studied in depth,relatively little is known about ET across their nanoscale counterpart,SAMs formed on nanoparticle surfaces.The interest in such systems is 2-fold;first,how does the monolayer molecular orientation on the highly curved surface of the nanocrystal(NC)affect the ET process.Second,in small systems,effects such as single-electron charging are expected to have a profound influence on the electrochemical kinetics at the NC"nanoelectrode".