Investigation on the adsorption characteristics of anserine on the surface of colloidal silver nanoparticles

• Anserine is a potent anti-oxidant present in animals.
• Optimized structure of silver complex of anserine explains the enhanced Raman modes.
• Concentration dependent SERS studies show changes in the orientation of anserine.

The surface-enhanced Raman scattering (SERS) studies of anserine (beta-alanyl-N-methylhistidine) was carried out on colloidal silver nanoparticles to understand its adsorption characteristics. The experimentally observed Raman bands were assigned based on the results of DFT calculations. The studies suggest that the interaction of anserine is primarily through the carboxylate group with the imidazole ring in an upright position with respect to the silver surface. Concentration dependent SERS studies suggest a change in orientation at sub-monolayer concentration.

The surface adsorption characteristics of anserine (an anti-oxidant) with silver nanoparticles were investigated from SERS studies. Optimized structure of the silver complex of anserine explains the enhanced Raman modes in the SERS spectrum.Figure optionsDownload as PowerPoint slide