Web Release Date: October 23,
Controlled Scalable Synthesis of ZnO Nanoparticles
and
Centre for Strategic Nano-Fabrication, School of Biomedical, Biomolecular and Chemical Sciences, and Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia
Received June 11, 2007
Revised Manuscript Received August 24, 2007
Abstract:
Zinc oxide nanoparticles are formed under continuous flow using spinning disc processing (SDP). Synthetic parameters such as temperature, flow rate, disc speed, and surface texture influence the reaction kinetics and particle size in an ethanolic solution using polyvinylpyrrolidone (PVP) as a capping agent. SDP ensures intense mixing, accelerates nucleation and growth, and affords monodispersed ZnO nanoparticles with controlled particle size. UV-visible spectroscopy shows the formation of particles down to a size of 1.3 nm and polydispersities of approximately 10%, as well as subnanometer clusters. Modification of the temperature and flow rate provides control of the particle size and polydispersity, albeit with the nanoparticles slowly undergoing ripening post-SDP.
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