Direct comparison of the electronic coupling efficiency of Sulfur and Selenium anchoring groups for molecules adsorbed onto gold electrodes

Abstract : We performed air and ultra-high vacuum scanning tunneling microscopy experiments in order to compare the electronic coupling provided by S and by Se used as alligator clips for bisthiol- and biselenol-terthiophene molecules adsorbed onto gold. The molecules were inserted in a dodecanethiol self-assembled monolayer. Their apparent height above the dodecanethiol matrix was used as a measure of the electronic coupling strength corresponding to S and Se, respectively. We show that the insertion behaviors of the two molecules are qualitatively the same, and that Se provides systematically a better coupling link than S whatever the tunneling conditions
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https://hal-cea.archives-ouvertes.fr/cea-01056952
Contributor : Serge Palacin <>
Submitted on : Thursday, August 21, 2014 - 8:40:37 AM
Last modification on : Friday, November 1, 2019 - 1:26:22 AM

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Lionel Patrone, Serge Palacin, Jean-Philippe Bourgoin, Jérôme Lagoute, Tomaso Zambelli, et al.. Direct comparison of the electronic coupling efficiency of Sulfur and Selenium anchoring groups for molecules adsorbed onto gold electrodes. Chemical Physics, Elsevier, 2002, 281, pp.325-332. ⟨10.1016/S0301-0104(02)00373-7⟩. ⟨cea-01056952⟩

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