Carotene as a molecular wire: Conducting atomic force microscopy

G. Leatherman, E. N. Durantini, John Devens Gust, Thomas A Moore, Ana L Moore, S. Stone, Z. Zhou, P. Rez, Y. Z. Liu, S. M. Lindsay

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A conducting atomic force microscope was used to measure the electrical properties of carotenoid molecules attached to a gold electrode. The thiolated carotene molecules were embedded in insulating n-alkanethiol self-assembled monolayers. At a contact force of a few nanoNewtons, a carotenoid molecule behaves ohmically with a resistance of approximately 4.2 ± 0.7 GΩ, over a million times more conductive than an alkane chain of similar length. Modes of electron transport are discussed.

Original languageEnglish
Pages (from-to)4006-4010
Number of pages5
JournalJournal of Physical Chemistry B
Issue number20
Publication statusPublished - 1999


ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Leatherman, G., Durantini, E. N., Gust, J. D., Moore, T. A., Moore, A. L., Stone, S., Zhou, Z., Rez, P., Liu, Y. Z., & Lindsay, S. M. (1999). Carotene as a molecular wire: Conducting atomic force microscopy. Journal of Physical Chemistry B, 103(20), 4006-4010.