期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 131, 期 31, 页码 10812-+出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja903389s
关键词
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资金
- Natural Science Foundation of China [10574122, 50772110, 50721091]
- National Basic Research Program of China [2006CB922000, 2007CB925202, 2009CB939901]
- CAS [KJCX2. YW.W06-3]
In this paper, we report a one-step, high-yield synthesis of one-dimensional Ag heteronanostructures in aqueous solution. Besides the usual fcc: phase of Ag, the heteronanostructures also contain a rare hcp (4H polytypic) phase, which favors asymmetrical growth. The rod-needle heteronanostructures (RNHSs) and plate-belt heteronanostructures (PBHSs) are formed through two different mechanisms. For RNHSs, the 4H and fcc phases coexist but have different densities in different segments, white for PBHSs, the fcc: and 4H crystal structures exist in plate and belt segments, respectively. Condition-sensitive coexisting phase preferences can be applied as a new way of controlling the shape and thus the properties of Ag nanostructures.
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