Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 131, Issue 32, Pages 11326-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja903751p
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Funding
- U.S. Department of Energy [DE-AC02-05CH11231]
- She National Center for Electron Microscopy at Lawrence Berkeley National Laboratory
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The formation of hollow vs solid particles by means of the oxidation reaction of solid metal particles depends on the differential self-diffusivities of the reactants through the composite shell, the reaction probabilities at each interface, and the concentration and diffusivity of the element in solution. By means of a kinetic model of the oxidation process, we determine the phase diagrams for the geometry of the oxidized particles and propose four shell growth regimes. We experimentally illustrate the different growth scenarios by changing the conditions of oxidation of cadmium spherical crystals using different chalcogen precursors.
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