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Carving at the Nanoscale: Sequential Galvanic Exchange and Kirkendall Growth at Room Temperature

Science  09 Dec 2011:
Vol. 334, Issue 6061, pp. 1377-1380
DOI: 10.1126/science.1212822

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Abstract

Shape control of inorganic nanocrystals is important for understanding basic size- and shape-dependent scaling laws and is useful in a wide range of applications. With minor modifications in the chemical environment, it is possible to control the reaction and diffusion processes at room temperature, opening up a synthetic route for the production of polymetallic hollow nanoparticles with very different morphology and composition, obtained by the simultaneous or sequential action of galvanic replacement and the Kirkendall effect.

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