Laser-Induced Conversion of Noble Metal-Island Films to Dense Monolayers of Spherical Nanoparticles
Citations Over TimeTop 10% of 2003 papers
Abstract
By postdeposition nanosecond laser irradiation at 532 nm with a relatively low laser fluence of typically ∼50 mJ/cm2, Ag- and Au-island films sputter-deposited on mica could be converted to a dense monolayer of spherical nanoparticles 40−60 nm in average diameter without aggregation. The peak position and good sharpness of the corresponding surface plasmon (SP) resonance suggested no significant interparticle SP interactions for the dense two-dimensional arrays of spherical nanoparticles tens of nanometers in diameter. In higher laser fluence regime above 100 mJ/cm2 or more, a complicated mode of film conversion resulting in strong deformation (flattening) of the SP band became dominant before the ablation mode finally set in. A crude estimate of the instantaneous temperature of the metal-island films as a function of laser fluence suggested that laser-induced melting is probably the major driving force for the conversion to good spherical nanoparticle films.
Related Papers
- → Optimal flattening of freeform surfaces based on energy model(2004)12 cited
- → Mathematical Modeling of Flattening Process on Rough Surfaces in Thermal Spray(1996)13 cited
- → A mechanism that applies heat and pressure for flattening paper bills in an automated teller machine(2004)2 cited
- → Relation between Flattening Conditions and Surface Strain and Plate Thickness(2009)
- → 1201 Flattening of Droplet on Reughened Substrates(2001)