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Science 19 September 1997:
Vol. 277. no. 5333, pp. 1791 - 1793
DOI: 10.1126/science.277.5333.1791
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Reports

An Electrochemical Coulomb Staircase: Detection of Single Electron-Transfer Events at Nanometer Electrodes

Fu-Ren F. Fan, Allen J. Bard *

The current-potential curve at a 2.8-nanometer-radius electrode immersed in a solution containing micromolar concentrations of a redox couple, [(trimethylammonio)methyl] ferrocene (Cp2FeTMA+)/Cp2FeTMA2+, shows discrete steps (a coulomb staircase) representing single electron-transfer events. Discrete potential steps are also found in the current-time curve as the electrode potential relaxes back to equilibrium after a coulostatic potential step.

Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78712, USA.
*   To whom correspondence should be addressed.

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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Gold Nanoelectrodes of Varied Size: Transition to Molecule-Like Charging.
S. Chen, R. S. Ingram, M. J. Hostetler, J. J. Pietron, R. W. Murray, T. G. Schaaff, J. T. Khoury, M. M. Alvarez, and R. L. Whetten (1998)
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