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Science 30 November 2001:
Vol. 294. no. 5548, p. 1785
DOI: 10.1126/science.294.5548.1785b
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An important challenge in the solution-phase synthesis of nanoparticles is to control particle size and shape while maintaining a high overall yield of product. Jin et al. (p. 1901) show that spherical silver particles can be almost completely converted by visible light into thin triangular prisms with edge lengths of 100 ± 15 nanometers. The triangular shape of these nanoparticles leads to unusual optical properties, such as the presence of two distinct quadrupole plasmon resonances and Rayleigh scattering in the red, rather than in the blue as is typical for spherical particles.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)