Peptide friction in water nanofilm on mica surface

cited authors

  • Zhou, B; Xiu, P; Wang, CL; Fang, HP


  • Peptide frictions in water nanofilms of various thicknesses on a mica surface are studied via molecular dynamics simulations. We find that the forced lateral motion of the peptide exhibits stick-slip behaviour at low water coverage; in contrast, the smooth gliding motion is observed at higher water coverage. The adsorbed peptide can form direct peptide - surface hydrogen bonds as well as indirect peptide - water - surface hydrogen bonds with the substrate. We propose that the stick-slip phenomenon is attributed to the overall effects of direct and indirect hydrogen bonds formed between the surface and the peptide. © 2012 Chinese Physical Society and IOP Publishing Ltd.


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