Silk patterns made by direct femtosecond laser writing #MMPMID27679677
Maximova K; Wang X; Bal?ytis A; Fan L; Li J; Juodkazis S
Biomicrofluidics 2016[Sep]; 10 (5): ä PMID27679677show ga
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.