Kinetics of polymer adsorption and desorption

Peter Frantz, Steve Granick

Research output: Contribution to journalArticlepeer-review

Abstract

We study adsorption-desorption kinetics of polymer chains at a solid surface. Protio polystyrene, adsorbed from cyclohexane to a single surface of oxidized silicon, was displaced by deuterio polystyrene. A single time constant, τoff, described displacement for a significant time (1-2 h). An aging effect, in which τoff continued to increase even after mass adsorbed had equilibrated, implied surprisingly slow rearrangements of adsorbed chains in the direction of conformational equilibrium. After equilibration, τoff increased exponentially with length of adsorbed chains.

Original languageEnglish (US)
Pages (from-to)899-902
Number of pages4
JournalPhysical review letters
Volume66
Issue number7
DOIs
StatePublished - 1991

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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