Water structuring and collagen adsorption at hydrophilic and hydrophobic silicon surfaces

Details Water structuring and collagen adsorption at hydrophilic and hydrophobic silicon surfaces Water structuring and collagen adsorption at hydrophilic and hydrophobic silicon surfaces

2009-12-15

arxiv.org/abs/0912.2926v1

Phys. Chem. Chem. Phys., 11, 11395 - 11399 (2009)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1039/b816125a

The adsorption of a collagen fragment on both a hydrophobic, hydrogen-terminated and a hydrophilic, natively oxidised Si surface is investigated using all-atom molecular dynamics. While favourable direct protein-surface interactions via localised contact points characterise adhesion to the hydrophilic surface, evenly spread surface/molecule contacts and stabilisation of the helical structure occurs upon adsorption on the hydrophobic surface. In the latter case, we find that adhesion is accompanied by a mutual fit between the hydrophilic/hydrophobic pattern within the protein and the layered water structure at the solid/liquid interface, which may provide an additional driving force to the classic hydrophobic effect.

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