Shape‐Controlled Synthesis of Metal Nanostructures: The Case of Silver

Chemistry - A European Journal - Tập 11 Số 2 - Trang 454-463 - 2005
Benjamin J. Wiley1, Yugang Sun, Brian T. Mayers, Younan Xia
1Department of Chemistry, University of Washington, Seattle, Washington 98195 USA

Tóm tắt

AbstractThe concept of shape‐controlled synthesis is discussed by investigating the growth mechanisms for silver nanocubes, nanowires, and nanospheres produced through a polymer‐mediated polyol process. Experimental parameters, such as the concentration of AgNO3 (the precursor to silver), the molar ratio between poly(vinylpyrrolidone) (PVP, the capping agent) and AgNO3, and the strength of chemical interaction between PVP and various crystallographic planes of silver, were found to determine the crystallinity of seeds (e.g., single crystal versus decahedral multiply twinned particles). In turn, the crystallinity of a seed and the extent of the PVP coverage on the seed were both instrumental in controlling the morphology of final product. The ability to generate silver nanostructures with well‐defined morphologies provides a great opportunity to experimentally and systematically study the relationship between their properties and geometric shapes.

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Chemistry - A European Journal

Tập 11 Số 2

454-463

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