Rodolphe Antoine, Pierre F. Brevet, Hubert H. Girault, Rodolphe Antoine, Pierre F. Brevet, Donald Bethell and David J. Schiffrin
Colloidal gold nanoparticles in toluene solution, synthesised using a two-phase liquid/liquid system, display second harmonic generation, wavelength analysis of which indicates the narrow frequency band of the gold surface plasmon for nanoparticles present at the air/toluene interface.