期刊
NANOTECHNOLOGY
卷 21, 期 7, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/21/7/075501
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资金
- Natural Science and Engineering Research Council of Canada (NSERC)
- Canadian Institutes of Health Research (CIHR)
- McGill University
- Le Fonds Quebecois de la Recherche sur la Nature et les Technologies (FQRNT)
- Natural Sciences and Engineering Council of Canada (NSERC)
Many interactions drive the adsorption of molecules on surfaces, all of which can result in a measurable change in surface stress. This article compares the contributions of various possible interactions to the overall induced surface stress for cantilever-based sensing applications. The surface stress resulting from adsorption-induced changes in the electronic density of the underlying surface is up to 2-4 orders of magnitude larger than that resulting from intermolecular electrostatic or Lennard-Jones interactions. We reveal that the surface stress associated with the formation of high quality alkanethiol self-assembled monolayers on gold surfaces is independent of the molecular chain length, supporting our theoretical findings. This provides a foundation for the development of new strategies for increasing the sensitivity of cantilever-based sensors for various applications.
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