Nanoprisms and method of making them
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Abstract
The invention is a novel photo-induced method for converting large quantities of silver nanospheres into nanoprisms, the nanoprisms formed by this method and applications in which the nanoprisms are useful. Significantly, this light driven process results in a colloid with a unique set of optical properties that directly relate to the nanoprism shape of the particles. Theoretical calculations coupled with experimental observations allow for the assignment of the nanoprism plasmon bands and the first identification of two distinct quadrupole plasmon resonances for a nanoparticle. Finally, unlike the spherical particles from which they derive and which Rayleigh light scatter in the blue, these nanoprisms exhibit scattering in the red, permitting multicolor diagnostic labels based not only on nanoparticle composition and size but also on shape.
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Citations
22 Claims
- 1. A silver nanoprism comprising a single silver crystal.
- 11. A nanoparticle label comprising a single silver crystal nanoprism.
- 20. A silver nanoprism having an in-plane quadrupole resonance of 470 nm and an out-of-plane quadrupole resonance of 340 nm.
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22. A silver nanoprism displaying both in-plane quadrupole resonance and out-of-plane quadrupole resonance.
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