| Molecular Order and Disorder in the Frictional Response of Alkanethiol Self-Assembled Monolayers. | |
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MedLine Citation:
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PMID: 21443236 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Molecular processes in the frictional response of an alkanethiol monolayer, self-assembled on a Au(111) surface, are studied by means of high-resolution friction force microscopy in ultrahigh vacuum. With increasing load, three regimes are observed on defect-free domains of the monolayer: smooth sliding with negligible friction, regular molecular stick-slip motion with increasing friction, and the onset of wear in the monolayer. Molecular contrast in the lateral force is found for inequivalent molecules within the unit cell of the c(4 × 2) superstructure. Significant differences in the frictional response are found between defect-free domains and areas including a domain boundary. Friction increases by an order of magnitude on domain boundaries in connection with irregular stick-slip motion. This increased friction at domain boundaries is observed at loads below the onset of wear. |
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Authors:
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Nitya Nand Gosvami; Philip Egberts; Roland Bennewitz |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-28 |
Journal Detail:
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Title: The journal of physical chemistry. A Volume: - ISSN: 1520-5215 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-29 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9890903 Medline TA: J Phys Chem A Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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INM-Leibniz Institute for New Materials , Campus D2 2, 66123, Saarbrücken, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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