Non conventional technique for physicochemical characterization of green synthesized nanoparticles

VALERIA SPRINGER; ALEJANDRO GONZÁLEZ FÁ; MARCELO PISTONESI; MARÍA SUSANA DI NEZIO; JUAN, ALFREDO

Mendoza, Argentina

Simposio; Actas 24th Latin American Symposium on Biotechnology Biomedical, Biopharmaceutical and Industrial Applications of Capillary Electrophoresis and Microchip Technology; 2018

LACE (Latin American Capillary Electrophoresis)

PAGE 99Silver nanoparticles (AgNPs) have gained remarkable importance in thescientific/technological fields due to their unique optical and electronic properties, which are directly related to their intrinsic composition, sizes, shape and specific surface, among others. In this work green synthesized AgNPs, obtained by using carbohydrates as reducing and capping agents [1], were characterized by conventional techniques (TEM and DLS) and non-conventional techniques such as Surface Enhancement Raman spectroscopy (SERS), theoretical computational models based on the Density Functional Theory (DFT) and CapillaryElectrophoresis (CE). Specifically, SERS and DFT were used to analyze the capping agents on the synthesized AgNPs. The experimentally obtained vibrational wavenumbers were comparable with those from the literature. Furthermore, D‐glucose and D‐gluconate adsorption geometries could be found on the silver surface according to the calculated normal modes and experimental calculations [2]. On the other hand, CE allowed to obtain valuable informationabout size distribution, zeta potential, electrophoretic mobility and stability of the obtained AgNPs in aqueous solution by a single electrophoretic run within a short analysis time (