Diffusive spreading of chainlike molecules on surfaces

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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

@article{Ala-Nissila1996Diffu-5308, title={Diffusive spreading of chainlike molecules on surfaces}, year={1996}, doi={10.1103/PhysRevLett.76.4003}, number={21}, volume={76}, journal={Physical Review Letters}, pages={4003--4006}, author={Ala-Nissilä, Tapio and Herminghaus, Stephan and Hjelt, Tuomo and Leiderer, Paul} }

Herminghaus, Stephan Leiderer, Paul 1996 eng application/pdf Hjelt, Tuomo 2011-03-24T14:54:49Z Leiderer, Paul Diffusive spreading of chainlike molecules on surfaces Ala-Nissilä, Tapio deposit-license First publ. in: Physical Review Letters 76 (1996), 21, pp. 4003-4006 Ala-Nissilä, Tapio Hjelt, Tuomo 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. 2011-03-24T14:54:49Z Herminghaus, Stephan

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