Phys. Rev. Lett. 94, 076103 (2005) [4 pages]Nanosphere Embedding into Polymer Surfaces: A Viscoelastic Contact Mechanics AnalysisSee Also: Erratum Received 19 October 2004; published 25 February 2005 Teichroeb and Forrest [ Phys. Rev. Lett. 91 016104 (2003)] image gold nanosphere embedment into a polystyrene surface and imply the existence of a liquid surface layer. We use a viscoelastic contact mechanics model of their results to give a contrary interpretation. The surface interactions between gold and polystyrene and the indentation depth determine the loads on the nanospheres. Using bulk properties, quantitative agreement between the model and the data is obtained, implying little or no depression in the glass temperature or existence of a liquid layer at the polystyrene surface. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.076103
DOI:
10.1103/PhysRevLett.94.076103
PACS:
68.08.–p, 62.25.+g, 64.70.Pf, 83.60.Bc
See AlsoErratum: S. A. Hutcheson and G. B. McKenna, Erratum: Nanosphere Embedding into Polymer Surfaces: A Viscoelastic Contact Mechanics Analysis [Phys. Rev. Lett. 94, 076103 (2005)], Phys. Rev. Lett. 94, 189902 (2005). |
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