Journal
ADVANCED MATERIALS
Volume 25, Issue 44, Pages 6313-6333Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201302820
Keywords
galvanic replacement; metal; hollow nanostructure; catalysis; biomedicine
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Funding
- NIH [R01 CA13852701, DP1 OD00798]
- Georgia Institute of Technology
- China Scholarship Council
- NSF Graduate Research Fellowship
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1215034] Funding Source: National Science Foundation
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This article provides a progress report on the use of galvanic replacement for generating complex hollow nanostructures with tunable and well-controlled properties. We begin with a brief account of the mechanistic understanding of galvanic replacement, specifically focused on its ability to engineer the properties of metal nanostructures in terms of size, composition, structure, shape, and morphology. We then discuss a number of important concepts involved in galvanic replacement, including the facet selectivity involved in the dissolution and deposition of metals, the impacts of alloying and dealloying on the structure and morphology of the final products, and methods for promoting or preventing a galvanic replacement reaction. We also illustrate how the capability of galvanic replacement can be enhanced to fabricate nanomaterials with complex structures and/or compositions by coupling with other processes such as co-reduction and the Kirkendall effect. Finally, we highlight the use of such novel metal nanostructures fabricated via galvanic replacement for applications ranging from catalysis to plasmonics and biomedical research, and conclude with remarks on prospective future directions.
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