Theoretical and experimental investigations on the photo-thermal effect of gold nanorods irradiated by femtosecond and nanosecond laser

Nanoparticle mediated laser induced breakdown can be used for synthesis, cell nanosurgery and spectroscopy. To investigate the photo-thermal conversion of gold nanoparticles during pulsed irradiation, electron-phonon two temperature model was established in this study. The impact energy density pulse width on thermal morphology change nanorods were investigated compared with experimental observations. results show that melting threshold under nanosecond irradiation is about twenty times femtosecond irradiation. mechanisms nanorod fragmentation are different between femto irradiation: particle more likely to occur while Coulomb explosion highly