Laser Induced Alloying in Metal Nanoparticles:Controlling Spectral Properties with Light

GREGORY V. HARTLAND; STEVE GUILLAUDEU; JOSE H. HODAK

Molecules as components of electronic devices

Oxford University Press

Lugar: Oxford; Año: 2003; p. 161 - 176

Laser excitation of metal nanoparticles can provide enoughenergy to melt or even fragment the particles. In this articlewe describe some recent experiments where controlled laserexcitation was used to transform core-shell bimetallic particlesinto the corresponding alloy. Results for Au-Ag particles insolution and in a thin film are presented. Details are givenabout the excitation energies needed for alloying and howinterdiffusion and alloying occur in nanoparticles. Thespectral and dynamical properties of bimetallic particles arealso discussed -especially as they pertain to ourexperiments.