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Photoinduced Conversion of Silver Nanospheres to Nanoprisms
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Photoinduced Conversion of Silver Nanospheres to Nanoprisms
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Journal Article
Photoinduced Conversion of Silver Nanospheres to Nanoprisms
2001
Overview
A photoinduced method for converting large quantities of silver nanospheres into triangular nanoprisms is reported. The photo-process has been characterized by time-dependent ultraviolet-visible spectroscopy and transmission electron microscopy, allowing for the observation of several key intermediates in and characteristics of the conversion process. This light-driven process results in a colloid with distinctive 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 for the first identification of two distinct quadrupole plasmon resonances for a nanoparticle. Unlike the spherical particles they are derived from that Rayleigh light-scatter in the blue, these nanoprisms exhibit scattering in the red, which could be useful in developing multicolor diagnostic labels on the basis not only of nanoparticle composition and size but also of shape.
Publisher
American Society for the Advancement of Science,American Association for the Advancement of Science,The American Association for the Advancement of Science
Subject
/ Condensed matter: electronic structure, electrical, magnetic, and optical properties
/ Diagnostic Techniques and Procedures
/ Exact sciences and technology
/ Lasers
/ Light
/ Nanocrystals and nanoparticles
/ Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
/ Physics
/ Plasmons
/ Silver
/ Tungsten
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