Method of making nanoshells
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United States of America Patent
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N/A
Issued Date -
Sep 19, 2002
app pub date -
Sep 27, 2001
filing date -
Sep 27, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of coating a complete metal layer onto a functionalized substrate particle to form a nanoshell is provided. The nanoshell preferably has a plasmon resonance with a maximum at a wavelength between about 400 nanometers and about 2 microns. The method includes providing a functionalized substrate particle and rapidity mixing a solution containing the substrate particle, ions of the metal, and a reducing agent with a base effective to coat the metal onto the functionalized substrate particle. The metal is preferably selected from among silver, nickel, and copper. The functionalized substrate particle preferably includes a silica surface and a precursor coating of tin. Alternatively, the functionalized substrate particle may include a silica surface, silane molecules bound to the core particle and gold colloids bound to the silane molecules.
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