Adsorption-desorption kinetics in nanoscopically confined oligomer films under shear

E. Manias, A. Subbotin, G. Hadziioannou, G. Ten Brinke

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The method of molecular dynamics computer simulations is employed to study oligomer melts confined in ultra-thin films and subjected to shear. The focus is on the self-diffusion of oligomers near attractive surfaces and on their desorption, together with the effects of increasing energy of adsorption and shear. It is found that the mobility of the oligomers near an attractive surface is strongly decreased. Moreover, although shearing the system forces the chains to stretch parallel to the surfaces and thus increase the energy of adsorption per chain, flow also promotes desorption. The study of chain desorption kinetics reveals the molecular processes responsible for the enhancement of desorption under shear. They involve sequences of conformations starting with a desorbed tail and proceeding in a very fast, correlated, segment-by-segment manner to the desorption of the oligomers from the surfaces.

Original languageEnglish (US)
Pages (from-to)1017-1032
Number of pages16
JournalMolecular Physics
Volume85
Issue number5
DOIs
StatePublished - Aug 10 1995

Fingerprint

oligomers
Oligomers
Adsorption
Desorption
desorption
Molecular Computers
shear
Kinetics
adsorption
kinetics
Molecular Dynamics Simulation
Computer Simulation
Ultrathin films
shearing
Shearing
Conformations
Molecular dynamics
computerized simulation
molecular dynamics
energy

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Molecular Biology
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Manias, E. ; Subbotin, A. ; Hadziioannou, G. ; Ten Brinke, G. / Adsorption-desorption kinetics in nanoscopically confined oligomer films under shear. In: Molecular Physics. 1995 ; Vol. 85, No. 5. pp. 1017-1032.
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Adsorption-desorption kinetics in nanoscopically confined oligomer films under shear. / Manias, E.; Subbotin, A.; Hadziioannou, G.; Ten Brinke, G.

In: Molecular Physics, Vol. 85, No. 5, 10.08.1995, p. 1017-1032.

Research output: Contribution to journalArticle

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