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MICROWAVE-ASSISTED SYNTHESIS OF NOBLE NANOSTRUCTURES USING BIODEGRADABLE POLYMER CARBOXYMETHYL CELLULOSE
Citation:
VARMA, R. S. AND M. N. NADAGOUDA. MICROWAVE-ASSISTED SYNTHESIS OF NOBLE NANOSTRUCTURES USING BIODEGRADABLE POLYMER CARBOXYMETHYL CELLULOSE. Presented at 41st International Microwave Power Symposium, Vancouver, BC, CANADA, August 01 - 03, 2007.
Impact/Purpose:
To inform the public.
Description:
Microwave-assisted (MW) synthesis of noble metals such as Au, Pt and Pd is reported using biodegradable polymer carboxymethyl cellulose (CMC) at 100°C within few seconds. The possible reduction entails the coupling of polar hydroxyl units in beta-glucopyranose units with microwaves which reduce metal ions. The formation of noble metals was confirmed using UV spectroscopy. Gold nanoparticles exhibited an intense peak at 517 nm and continuous absorption in the UV range was observed for Pt and Pd nanostructures as expected. MW irradiation provides rapid and uniform heating of reagents, solvents, and intermediates and this homogeneous heating also provides uniform nucleation and growth conditions, resulting in the formation of homogeneous