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Microwave-Assisted Green Synthesis of Silver Nanostructures
Citation:
NADAGOUDA, M. N., T. F. SPETH, AND R. S. VARMA. Microwave-Assisted Green Synthesis of Silver Nanostructures. Accounts of Chemical Research. ACS Publications, Washington, DC, 44(7):469 - 478, (2011).
Impact/Purpose:
To inform the public.
Description:
This account summarizes a microwave (MW)-assisted synthetic approach for producing silver nanostructures. The rapid and in-core MW heating has received considerable attention as a promising new method for the one-pot synthesis of metallic nanostructures in solutions. Conceptually, the advantageous application of this method has been demonstrated for the preparation of silver (Ag), gold (Au), platinum (Pt), and gold-palladium (Au-Pd) nanostructures. MW heating conditions not only allow the preparation of spherical nanoparticles within a few minutes, but also the formation of single crystalline polygonal plates, sheets, rods, wires, tubes, and dendrites using this approach. The morphologies and sizes of the nanostructures can be controlled by changing various experimental parameters, such as the concentration of metallic salt precursors, surfactant polymers, the chain length of the surfactant polymers, the solvents, and the operation reaction temperature. In general, nanostructures with smaller sizes, narrower size distributions, and a higher degree of crystallization have been obtained more often using MW heating than those prepared in conventional oil-bath heating. This MW approach is a viable 1 avenue for greener synthesis of nanomaterials with several desirable attributes, such as shorter reaction times, reduced energy consumption, and better product yields.
