A vapor-solid strategy to silica sheathed metal nanostructures and microstructures via reactions of metal chlorides with silicon |
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Authors: | Wang Jin Zhang Haoxu Ge Jianping Li Yadong |
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Institution: | Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China. |
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Abstract: | A facile vapor-solid strategy has been developed to prepare silica-sheathed metal micro/nanostructures with controllable shapes. As examples, silica-sheathed nickel nanowires (diameter approximately 50 nm), microcubes (edge length 1-3 microm), nanocubes (edge length approximately 200 nm) with an epitaxial tail (diameter<100 nm), and 1D assembly structures of nanoparticles (particle diameter<100 nm) as well as silica-sheathed cobalt and copper micro/nanostructures are synthesized. The possible reaction and growth mechanisms of Ni/SiO2 structures are discussed. The method is expected to be applied to a wider range of metals. |
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