Abstract
We propose· easily renewable surface modification technique. A self-assembling peptide, RASDA16[CH3CO-(Arg-Ala-Ser-Ala)3-Arg-Ala-Asp-Ala-CONH2] was used as a component for a surface modification. This peptide forms a self-assembling hydrogel which could contain water as much as 99.5wt%. Then, the peptide was fixed on a silicon substrate to use a silane coupling agent. The peptide hydrogel was constructed on a silicon substrate by immersing in the peptide solution. The obtained substrate showed very high hydrophilicity. Furthermore, the wetting property of the substrate would be recovered by soaking the substrate in the peptide solution again, even if the peptide network on the substrate was removed. The hydrophilicity of the peptide-fixed substrate was efficiently recovered by RASDA16 adsorption on the substrate in a lower concentration of the peptide solution.
