Multilevel surface nano- and microstructuring via sequential photoswelling of dichromated gelatin.
Photoswelling of thin films of dichromated gelatin provides a basis for fabrication of multilevel surface reliefs via sequential UV illumination through different photomasks. The remarkable feature of this simple, benchtop technique is that by adjusting irradiation times, film thickness, or its hydration state the heights of the developed features can be varied from few nanometers to tens of microns. After UV exposure, the surface structures can be replicated faithfully into either soft or hard PDMS stamps.
Paszewski
Maciej
M
Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, Illinois 60208, USA.
Smoukov
Stoyan K
SK
Klajn
Rafal
R
Grzybowski
Bartosz A
BA
D002840:Chromates; D005780:Gelatin; D013499:Surface Properties / Q000528:radiation effects; D014466:Ultraviolet Rays
D002840:Chromates; D005780:Gelatin