Metal microneedle fabrication using twisted light with spin.
Microneedle fabrication on a metal surface based on laser ablation using twisted light with spin was demonstrated, for the first time. The resulting needle showed a height of at least 10 microm above the target surface and a tip diameter of less than 0.3 microm. We also demonstrated the fabrication of a two-dimensional 5 x 6 microneedle array. The needles were uniformly well shaped with an average length and tip diameter of about 10 and 0.5 microm, respectively.
Omatsu
Takashige
T
Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan. omatsu@faculty.chiba-u.jp
Chujo
Keisuke
K
Miyamoto
Katsuhiko
K
Okida
Masahito
M
Nakamura
Kazuki
K
Aoki
Nobuyuki
N
Morita
Ryuji
R
D004566:Electrodes; D053844:Lasers, Solid-State; D008027:Light; D018613:Microscopy, Confocal; D008962:Models, Theoretical; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods*; D009339:Needles; D009904:Optical Rotation