Size Dependence of the Surface Plasmon Enhanced Second Harmonic Response of Gold Colloids: Towards a New Calibration Methods

Hyper Rayleigh scattering in solution is used for the determination of the first order hyperpolarizability b(colloid) of gold colloids in the size range 5–22 nm; these hyperpolarizabilities are found to range from 0.60 × 10–25 esu for 5 nm diameter colloids to up to 16.6 × 10–25 esu for 22 nm diameter colloids at the second harmonic wavelength of 532 nm; the strong size dependence of the hyperpolarisabilities reported here suggests that hyper Rayleigh scattering experiments can efficiently be used to calibrate the particle diameter of colloidal suspensions.


Published in:
Chemical Communications, 7, 581-582
Year:
1999
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2005-11-07, last modified 2018-03-17

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