Mercury Segregation and Diselenide Self-Assembly on Gold

Prato, Mirko and Toccafondi, Chiara and Maidecchi, Giulia and Chaudhari, Vijay and Harish, Makri Nimbegondi Kotresh and Sampath, Srinivasan and Parodi, Renzo and Esaulov, Vladimir A and Canepa, Maurizio (2012) Mercury Segregation and Diselenide Self-Assembly on Gold. In: The Journal of Physical Chemistry C, 116 (3, SI). pp. 2431-2437.

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Abstract

We have investigated the self-assembly of didecyldiselenide on gold containing mercury using X-ray photoelectron spectroscopy, cyclic voltammetry and infrared spectroscopy. The analysis of intensity and chemical shift of selected Se, Hg, and Au photoelectron lines on samples with increasing Hg content, show that didecyldiselenide adsorption strongly contributed to segregation of bulk Hg to the surface. The voltammetry results support this conclusion and suggest the formation of Hg-Au surface amalgam. The Hg surface segregation effect must be related to the restructuring of the surface following initial adsorption, and to the strong selenophilicity of Hg. The reflectance absorbance infrared spectroscopy studies show that the molecular layer on Hg-Au substrates lacks good order.

Item Type:	Journal Article
Publication:	The Journal of Physical Chemistry C
Publisher:	American Chemical Society
Additional Information:	Copyright of this article belongs to American Chemical Society.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	27 Feb 2012 11:43
Last Modified:	27 Feb 2012 11:43
URI:	http://eprints.iisc.ac.in/id/eprint/43670

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