Diffusive spreading of chainlike molecules on surfaces

Ala-Nissilä, Tapio; Herminghaus, Stephan; Hjelt, Tuomo; Leiderer, Paul

Diffusive spreading of chainlike molecules on surfaces

Files

183_physrevlett_1996.pdf(167.11 KB)

Date

1996

Authors

Ala-Nissilä, Tapio

Herminghaus, Stephan

Hjelt, Tuomo

Leiderer, Paul

Publication type

Journal article

Published in

Physical Review Letters ; 76 (1996), 21. - pp. 4003-4006

Abstract

We study the diffusion and submonolayer spreading of chainlike molecules on surfaces. Using the fluctuating bond model, we extract the collective and tracer diffusion coefficients Dc and Dt with a variety of methods. We show that Dc(O) has unusual behavior as a function of the coverage O. It first increases, but after a maximum goes to zero as O -> 1. We show that the increase is due to entropic repulsion that leads to steep density profiles for spreading droplets seen in experiments. We also develop an analytic model for Dc(O) which agrees well with the simulations.

Subject (DDC)

530 Physics

Cite This

ISO 690

ALA-NISSILÄ, Tapio, Stephan HERMINGHAUS, Tuomo HJELT, Paul LEIDERER, 1996. Diffusive spreading of chainlike molecules on surfaces. In: Physical Review Letters. 76(21), pp. 4003-4006. Available under: doi: 10.1103/PhysRevLett.76.4003

BibTex

@article{AlaNissila1996Diffu-5308,
  year={1996},
  doi={10.1103/PhysRevLett.76.4003},
  title={Diffusive spreading of chainlike molecules on surfaces},
  number={21},
  volume={76},
  journal={Physical Review Letters},
  pages={4003--4006},
  author={Ala-Nissilä, Tapio and Herminghaus, Stephan and Hjelt, Tuomo and Leiderer, Paul}
}

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