Molecular motion in a spreading precursor film

Journal Article (Academic article)

Spreading of a polymer drop on a solid substrate was monitored with mol. resoln. Three characteristic rates, i.e., the spreading rate of the precursor film Dspread=(3.9±0.2)×103 nm2/s, the flow-induced diffusion rate of mols. within the film Dinduced=1.3±0.1 nm2/s, and the thermal diffusion coeff. of single mols. Dtherm≤0.10±0.03 nm2/s, were independently measured. Since Dspread»Dinduced, the plug flow of polymer chains was identified as the main mass-transport mechanism of spreading with an insignificant contribution from the mol. diffusion. [on SciFinder(R)]

Full Text

Duke Authors

Cited Authors

  • Xu, H; Shirvanyants, D; Beers, K; Matyjaszewski, K; Rubinstein, M; Sheiko, SS

Published Date

  • 2004

Published In

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/PhysRevLett.93.206103