Switchable Molecular Conductivity

We demonstrate the switchability of the molecular conductivity of a citrate. This was made possible through mechanical stretching of two conformers of such citrate capped on and linked between gold nanoparticles (AuNPs) self-assembled as a film. On the basis of experimental results, theoretical anal...

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Published inJournal of the American Chemical Society Vol. 131; no. 30; pp. 10447 - 10451
Main Authors Wang, Ke, Rangel, Norma L, Kundu, Subrata, Sotelo, Juan C, Tovar, Roberto M, Seminario, Jorge M, Liang, Hong
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 05.08.2009
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Summary:We demonstrate the switchability of the molecular conductivity of a citrate. This was made possible through mechanical stretching of two conformers of such citrate capped on and linked between gold nanoparticles (AuNPs) self-assembled as a film. On the basis of experimental results, theoretical analysis was conducted using the density function theory and Green’s function to study the electron flux in the backbone. We found that the molecular conductivity depended on the pathways of electrons that were controlled by the applied mechanical stress. Under stress, we could tune the conductivity up and down for as much as 10-fold. The mechanochemistry behind this phenomenon is an alternative branch of chemistry.
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ISSN:0002-7863
1520-5126
DOI:10.1021/ja901156x