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