Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Synthesis and Optical Properties of Flower- and Spiky-Ball-Like Silver–Gold Nanoparticles
Keisuke KumagaiAkito Ishida
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2014 Volume 87 Issue 7 Pages 780-791


Flower- and spiky-ball-like nanoparticles were selectively obtained by the reduction of H[AuCl4] and AgNO3 with ascorbic acid in the presence and absence of poly(vinylpyrrolidone) with sufficient reproducibility. The morphological switch is attributable to the selective passivation of the crystal facets of the initially grown core particles and growing nanostructures on the surfaces. The characteristic optical properties, which are due to the surface nanostructures, were studied via measurement of the extinction spectra and finite-difference time-domain simulations.

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© 2014 The Chemical Society of Japan
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