Journal article

Vibrational response of Au-Ag nanoboxes and nanocages to ultrafast laser-induced heating

Hristina Petrova, Chien-Hua Lin, Min Hu, Jingyi Chen, Andrew R Siekkinen, Younan Xia, John E Sader, Gregory V Hartland

NANO LETTERS | AMER CHEMICAL SOC | Published : 2007

Abstract

Time-resolved spectroscopy has been used to investigate the vibrational properties of hollow cubic nanoparticles: Au-Ag nanoboxes and nanocages. In these experiments, laser-induced heating was used to coherently excite the breathing vibrational modes of the particle. The vibrational periods scale with the edge length of the particle and the nanocages and nanoboxes showing equivalent responses despite a large difference in their morphology. The measured vibrational periods are compared to finite element calculations, where the particles are modeled as a hollow cube, with the principle crystal axes parallel to the sides of the cube. Very good agreement is obtained between the calculations and ..

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University of Melbourne Researchers