Silk patterns made by direct femtosecond laser writing.
Silk patterns in a film of amorphous water-soluble fibroin are created by tailored exposure to femtosecond-laser pulses (1030 nm/230 fs) without the use of photo-initiators. This shows that amorphous silk can be used as a negative tone photo-resist. It is also shown that water insoluble crystalline silk films can be precisely ablated from a glass substrate achieving the patterns of crystalline silk gratings on a glass substrate. Bio-compatible/degradable silk can be laser structured to achieve conformational transformations as demonstrated by infrared spectroscopy.
Center for Micro-Photonics, Swinburne University of Technology , John St., Hawthorn, Victoria 3122, Australia.
Ksenia
K
Maximova
Center for Micro-Photonics, Swinburne University of Technology , John St., Hawthorn, Victoria 3122, Australia.
Xuewen
0000-0003-3751-0306
X
Wang
Armandas
A
Balčytis
Australian Future Fibers Research and Innovation Centre, Institute for Frontier Materials, Deakin University , Geelong, Victoria 3220, Australia.
Linpeng
L
Fan
Australian Future Fibers Research and Innovation Centre, Institute for Frontier Materials, Deakin University , Geelong, Victoria 3220, Australia.
Jingliang
J
Li
Saulius
S
Juodkazis
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