AN ELECTROCHEMICAL COULOMB STAIRCASE - DETECTION OF SINGLE ELECTRON-TRANSFER EVENTS AT NANOMETER ELECTRODES

Authors
Citation
Frf. Fan et Aj. Bard, AN ELECTROCHEMICAL COULOMB STAIRCASE - DETECTION OF SINGLE ELECTRON-TRANSFER EVENTS AT NANOMETER ELECTRODES, Science, 277(5333), 1997, pp. 1791-1793
Citations number
16
Categorie Soggetti
Multidisciplinary Sciences
Journal title
ISSN journal
00368075
Volume
277
Issue
5333
Year of publication
1997
Pages
1791 - 1793
Database
ISI
SICI code
0036-8075(1997)277:5333<1791:AECS-D>2.0.ZU;2-R
Abstract
The current-potential curve at a 2.8-nanometer-radius electrode immers ed in a solution containing micromolar concentrations of a redox coupl e, [(trimethylammonio)methyl] ferrocene (Cp(2)FeTMA(+))/Cp(2)FeTMA(2+) , shows discrete steps (a coulomb staircase) representing single elect ron-transfer events. Discrete potential steps are also found in the cu rrent-time curve as the electrode potential relaxes back to equilibriu m after a coulostatic potential step.