Diffusion-limited thiol adsorption on the gold(111) surface.
An optical second harmonic generation measurement of the kinetics of self-assembly of a monolayer of thiols on the Au(111) surface reveals a marked dependence of the adsorption rate upon the solution flow rate. The nature of this dependence indicates that at low concentration and low flow rate the monolayer growth is limited by the existence of a Nernst diffusion layer, not by surface reaction rate kinetics.
Camillone
Nicholas
N
Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, USA. nicholas@bnl.gov