[13p-C301-1~12] 4.8 Strong Light Excitation Phenomena Applied to Materials and Bio Engneering

▲ [13p-C301-11] On-Demand Deposition of Gold Nanodots by Laser-Induced Dot Transfer

〇Aiko Narazaki¹, Yoshiki Nakata², Tatsuya Shoji³, Yasuyuki Tsuboi³ (1.AIST, 2.ILE Osaka Univ., 3.Osaka City Univ.)

Keywords:Laser-induced transfer, Gold nanodot, On-demand deposition

Size and site-controlled metallic nanodot formation has good potential in the fields of plasmonics and nanophotonics, such as ultrasensitive surface-enhanced Raman scattering detection and metamaterials. We have demonstrated on-demand fabrication of dots with a diameter of 500 nm to a few micrometers by laser-induced transfer with one-to-one dot deposition and sub-spot resolution, which is referred to laser-induced dot transfer (LIDT). In LIDT, a single laser pulse is tightly focused onto a source film, which is on a supporting transparent plate, and site-controlled deposition of a single melt droplet onto a receiver substrate placed behind the film occurs. The droplets have much smaller lateral dimensions than the laser focal area. The LIDT is advantageous in that it has higher resolutions than commercially available inkjet techniques and there is an availability of solvent-free source materials. In this work, we report on-demand deposition of gold nanodots by the LIDT.