Synthesis of Shape-Anisotropic Nanomaterials using Spontaneous Galvanic Displacement Reactions
The direct synthesis of nanostructures using wet chemical reduction methods has had a major impact on catalysis and materials design. However, no mechanism has yet been reported that explicitly provides growth parameters for shapes and sizes as a function of desired metals, making it difficult to directly synthesize shaped particles from specific metals. There have been reports in the literature using this method to obtain core-shell, porous cage-like and irregular structures, however only one report proposing a mechanism of the displacement process exists, which does not explain surface and bulk morphology changes as a function of reaction condition. Here, we demonstrate the use of small angle x-ray scattering (SAXS), and microscopy to study the Ag-to-Pt displacement process of nanoparticles, nanowires and nanoplates at known intervals throughout the reaction. Obtaining a fundamental understanding of the displacement process will allow us to tune composition, morphology, and thus electronic properties of novel materials.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy Fuel Cell Technologies Program
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1087246
- Resource Relation:
- Conference: American Chemical Society. Abstracts of Papers of the 245th ACS National Meeting, 7-11 April 2013, New Orleans, Louisiana; Related Information: Abstract No. INOR-209
- Country of Publication:
- United States
- Language:
- English
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