We report a synthesis of Au/MgO core/shell nanoparticles using the sonochemical and titration methods. The purpose of our work is to address the development of a biosensor for drug testing. The synthesis consisted of a two step method: the formation of the gold nanoparticles and the reduction of the MgO precursors.  In addition, we analyze the formation of the core shell nanoparticles varying the heating time, the titration rate and the ultrasonic time. The nanoparticles were characterized using UV-VIS, IR and scanning electron microscopy (SEM). The optical spectroscopy studies indicate the Localized Surface Plasmon Resonance (LSPR) band absorption at 526 nm.  The Au/MgO core/shell absorption shows three important peaks centered in 280 nm, 530 nm and 700 nm.  The formation of these new peaks suggested the achievement of the Au/MgO nanoparticles.  We are working in the functionalization of the core shells for detection of pseudoephedrine. The optical studies show new band formations suggesting the interaction of the nanoparticles with the drug.

Kinetic study of the formation of Au/MgO core/shell nanoparticles for drug testing

247th National Meeting (2014)

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