Nanostructured silver dendrites for photon-induced Cysteine dimerization.

ABSTRACT: Under a controlled adsorption environment, L-cysteine molecules can be chemically adsorbed to the dendritic silver (Ag-D) surface by electrochemical methods with different functional groups. It is verified by surface-enhanced Raman spectroscopy that under alkaline conditions (pH?=?13.50), the two functional groups of thiol and acid are simultaneously adsorbed on the surface of Ag-D, while NH₂ is far from the surface; under acidic conditions (pH?=?1.67), adsorption behavior suggests that both NH₃⁺ and COO^- are oriented toward the Ag-D surface, and that SH is far from the surface. The structure of L-cysteine adsorption under acidic conditions can be further verified by the addition of an L-cysteine molecule through light-induced coupling reaction to form cystine. Finally, in-situ two-dimensional Raman scattering spectroscopy confirmed the feasibility and uniformity of the coupling reaction.

SUBMITTER: Chang CY 

PROVIDER: S-EPMC6934660 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature