Laser-induced forward transfer of TiO2–Au nanocomposite films for maskless patterning

Sakata, H.; Chakraborty, S.; Yokoyama, E.; Wakaki, M.; Chakravorty, D.
March 2005
Applied Physics Letters;3/14/2005, Vol. 86 Issue 11, p114104
Academic Journal
Laser-induced forward transfer is investigated for maskless pattering of thin films. A 89TiO2–11Au (mol %) nanocomposite polycrystalline (100 nm thick) film fabricated by a sol-gel method shows a surface plasmon absorption produced by Au nanoclusters formed in the film. A second-harmonic generation sheet beam of a Q-switched Nd:YAG laser was irradiated on the film in air in contact with another glass substrate or with a 0.14 mm air gap. Regular stripe patterns of laser-induced transferred films were obtained. Transmittance spectra of laser-induced transferred films showed shifts of the surface plasmon absorption peak. Analysis of the spectra using the Mie scattering model revealed the porous character of transferred films.


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