Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Electrochemical Characterization of Nanosized Electrode Arrays Prepared from Nanoporous Self-Assembled Monolayers

  • Choi, Shin-Jung (Department of Chemistry and Center for Integrated Molecular Systems,Pohang University of Science and Technology) ;
  • Park, Su-Moon (Department of Chemistry and Center for Integrated Molecular Systems,Pohang University of Science and Technology)
  • Published : 2002.05.20
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Abstract

We characterized nanoelectrode arrays prepared from self-assembled monolayers (SAMs) by adsorption from a solution containing thiolated $\beta$-cyclodextrin ($\beta$-CD) and n-alkanethiol on the gold electrode surface, using electrochemical methods. While the framework, the n-hexadecanethiol SAM, effectively blocked electron transfer between the electrode surface and solution-phase redox probe molecules, the $\beta$-CD cavities isolated in the forests of n-hexadecanethiol molecules were shown to act as an ultramicroelectrode array. The shapes of cyclic voltammograms of probe molecules were related to the number densities of $\beta$-CD molecules within the monolayer films. Probe molecules that have the correct combination of physical and chemical characteristics were shown to effectively penetrate the framework through the $\beta$-CD pores and exchange electrons with the electrode surface.

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