Surface Forces Microbalance and Microelectrode Measurements of InterfacialMolecular Structure and Electron-Transfer Rates

摘要

Fundamental Investigations of Microelectrodes. The voltammetric response ofmicroelectrodes (dimensions between 10 and 1000 A) have been simulated using Poisson's equation coupled with the Nemst-Planck transport relationships. The results demonstrate that a significant error in the values of standard heterogeneous rates result from using conventional electroanalytical treatments that assume electroneutrality. The results were used to reanalyze data previously published by other research groups. High electronic conductivity (-1 Amp/cm2) in concentrated organic solutions was discovered and characterized by microelectrode techniques. A mechanism of this unusual conduction based on homogenous self-exchange reactions was developed. Scanning Tunneling Microscopy and Spectroscopy. Atomically smooth adlayers of halogen atoms (F, Cl, Br, and I) have been synthesized on Ag(l 11) surfaces. The adlayer structures have been determined using scanning tunneling microscopy. Resonant tunneling through individual adatoms has been observed in tunneling spectroscopy. Tip-induced surface reconstruction on Au(l 11) surfaces and dislocation motion on ordered pyrolitic graphite were discovered.