Nanosphere embedding into polymer surfaces: A viscoelastic contact mechanics analysis

S. A. Hutcheson, G. B. McKenna

Research output: Contribution to journalArticle

75 Scopus citations

Abstract

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.

Original languageEnglish
Article number076103
JournalPhysical Review Letters
Volume94
Issue number7
DOIs
StatePublished - Feb 25 2005

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