The role of glycodendrimer in the structural and optical studies of Co@AgCl core-shell nanoparticles

A novel route has been developed for the synthesis of Co@AgCl core-shell nanoparticles. Two different types of Co@AgCl core shell nanoparticles were prepared using (a) Polyvinyl Pyrolidine (PVP) and (b) zeroth generation triazolyl glycodendrimer as stabilizing agents. The study was carried out to analyze the significance of using glycodendrimer as stabilizing agent. The results obtained were compared with that of Co@AgCl nanoparticle using PolyVinyl Pyrolidine (PVP) as stabilizing agent. The NMR spectrum ensures the number of proton and carbon signals in glycodendrimer. The crystal structure of the samples was confirmed as face centered cubic through XRD measurement. The average grain size and the strain of the samples were calculated by using Debye-Scherrer Formula and W-H method respectively. The structure and particle size of the as-synthesized Co@AgCl nanoparticles were confirmed by HRTEM images. The optical properties of the as-synthesized Co@AgCl (a & b) nanoparticles were analyzed by UV-Vis Spectroscopy and the indirect band gap energy was calculated as 3.01 eV and 2.40 eV respectively by Tauc Plot. The photoluminescence studies were carried out for both the samples and the results were compared to elucidate the effective role of glycodendrimer as stabilizing agent than that of PVP in the optical applications of Co@AgCl core - shell nanoparticles.