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The hyper-Rayleigh scattering(HRS) technique has been employed to determine the second-order nonlinear optical response of a highly monodisperse silver colloid and its aggregation which is induced in the presence of KNO3. Through the size distribution and TEM measurements, the silver nanoparticle aggregates have been observed as a chain-like aggregation. The experimental result reveals that HRS signal increases 15 times when the aggregation average size is up to 120nm.
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Keywords:
- silver nanoparticle /
- HRS /
- second-order nonlinearity /
- aggregation
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