SYSTEM AND METHOD FOR SYNTHESIZING CORE/ALLOY NANOSTRUCTURES
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United States of America Patent
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May 10, 2012
app pub date -
Nov 8, 2011
filing date -
Nov 8, 2010
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Abstract
A system and method to tailor the optical properties of nanomaterials using a core-alloy-shell nano-ultrastructure. Atomic diffusion is used at the nanoscale in order to process as-synthesized nanomaterials into core-alloy-shell architectures. The alloy formation is controlled by the deposition of the alloy solute atoms, and then by alloy interdiffusion of the solute into the core nanoparticle. By controlling temperature, it is possible to control how far the solute diffuses into the core, which in turn allows the tailoring of the optical response of the particle itself. The alloy formation and subsequent interdiffusion allows tailoring of the nanoparticle composition and ultrastructure, resulting in a dramatic tunability of the metal nanostructures surface plasmon response.
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