Photoconductance and inverse photoconductance in films of functionalized metal nanoparticles

Hideyuki Nakanishi, Kyle J. M. Bishop, Bartlomiej Kowalczyk, Abraham Nitzan, Emily A. Weiss, Konstantin V. Tretiakov, Mario M. Apodaca, Rafal Klajn, J. Fraser Stoddart and Bartosz A. Grzybowski ()
Additional contact information
Hideyuki Nakanishi: Department of Chemistry,
Kyle J. M. Bishop: Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
Bartlomiej Kowalczyk: Department of Chemistry,
Abraham Nitzan: Department of Chemistry,
Emily A. Weiss: Department of Chemistry,
Konstantin V. Tretiakov: Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
Mario M. Apodaca: Department of Chemistry,
Rafal Klajn: Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
J. Fraser Stoddart: Department of Chemistry,
Bartosz A. Grzybowski: Department of Chemistry,

Nature, 2009, vol. 460, issue 7253, 371-375

Abstract: Negative photoconductance A photoconductor is a material whose electrical conductivity changes when illuminated — invariably increasing in response to the incident light. Now Nakanishi et al. show how nanoparticle-based materials can be engineered, through careful choice of the molecules used to stabilize the nanoparticles, to exhibit negative (or 'inverse') photoconductance — thin films of these materials become less conducting in the presence of light. Nanoparticle-based photoconductors based on the principles underlying these observations could find use as chemical sensors.

Date: 2009
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DOI: 10.1038/nature08131

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