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Stress at the solid-liquid interface of self-assembled monolayers on gold investigated with a nanomechanical sensor

Fritz, J. and Baller, M. K. and Lang, H. P. and Strunz, T. and Meyer, E. and Guntherodt, H. J. and Delamarche, E. and Gerber, C. and Gimzewski, J. K.. (2000) Stress at the solid-liquid interface of self-assembled monolayers on gold investigated with a nanomechanical sensor. Langmuir, Vol. 16, H. 25. pp. 9694-9696.

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Official URL: http://edoc.unibas.ch/dok/A5262152

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Abstract

The interfacial stress of self-assembled monolayers on Au exposed to buffers of various pH values and ionic strengths is measured as a function of the liquid environment. The method uses two thiol-modified Au-covered silicon cantilevers and a differential method to compensate for thermal and refractive index changes of the liquid environment. Increasing pH and ionic strength leads to a bending, i.e., a compressive stress, of a mercaptohexadecanoic acid-covered cantilever compared to a hexadecanethiol-covered reference cantilever. In addition, the interfacial stress is found to be highly dependent on the surface density of the ionizeable mercaptohexadecanoic acid molecules when they are coadsorbed with hexadecanethiols on Au.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanomechanik (Meyer)
UniBasel Contributors:Meyer, Ernst
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Chemical Society
ISSN:0743-7463
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:26
Deposited On:22 Mar 2012 13:55

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