Modeling surfactant adsorption on hydrophobic surfaces.
Surfactant adsorption on hydrophobic surfaces is of current interest in attempts to solubilize single-wall carbon nanotubes and to render quantum dots biocompatible. A coarse grained method is presented for incorporating a hydrophobic surface into existing liquid force fields by appealing to statistical mechanics and probability theory. The dimensionality problem which arises is overcome with an approximate treatment and the entire procedure is applied to aqueous n-alkyl poly(ethylene oxide) adsorbing onto a graphite surface. The simulations are in excellent agreement with atomic force microscopy data. The mechanism of micelle adsorption onto a partially coated surface is reported for the first time and has implications for the construction of nanotemplates.
Nielsen
Steve O
SO
Center for Molecular Modeling and Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104-6323, USA. sneilsen@cmm.upenn.edu
Srinivas
Goundla
G
Lopez
Carlos F
CF
Klein
Michael L
ML
D000327:Adsorption; D001672:Biocompatible Materials / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D008823:Micelles; D008956:Models, Chemical; D011092:Polyethylene Glycols / Q000737:chemistry; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*
D001672:Biocompatible Materials; D008823:Micelles; D013501:Surface-Active Agents; D011092:Polyethylene Glycols