화학공학소재연구정보센터
Journal of Physical Chemistry B, Vol.121, No.38, 8869-8877, 2017
Dynamics at a Peptide TiO2 Anatase (101) Interface
The interface between biological matter and inorganic materials is a widely investigated research topic due to possible applications in biomedicine and nanotechnology. In this context, the molecular level adsorption mechanism that drives specific recognition between small peptide sequences and inorganic surfaces represents an important topic likely to provide much information useful for designing bioderived materials. Here, we investigate the dynamics at the interface between a Ti-binding peptide sequence (AMRKLPDAPGMHC) and a TiO2 anatase surface, by using molecular dynamics (MD) siniulatiOns. In the simulations the adsorption mechanism is characterized by diffusion-the peptide from the bulk water phase toward the TiO2 surface, followed by the anchoring of the peptide to the surface. The anchoring is mediated by the interfacial water layers by means of the charged groups of the side chains of the peptide. The peptide samples anchored and dissociated states from the surface and its conformation is not affected by the surface when anchored.