Rapid nano impact printing of silk biopolymer thin films

Journal Article (Journal Article)

In this paper, nano impact printing of silk biopolymer films is described. An indenter is rapidly accelerated and transfers the nanopattern from a silicon master into the silk film during an impact event that occurs in less than 1 ms. Contact stresses of greater than 100 MPa can be achieved during the short impact period with low power and inexpensive hardware. Ring shaped features with a diameter of 2 μm and a ring width of 100-200 nm were successfully transferred into untreated silk films using this method at room temperature. Mechanical modeling was carried out to determine the contact stress distribution, and demonstrates that imprinting can occur for contact stresses of less than 2 MPa. Thermal characterization at the impact location shows that raising the temperature to 70°C has only a limited effect on pattern transfer. Contact stresses of greater than approximately 100 MPa result in excessive deformation of the film and poor pattern transfer. © 2011 IOP Publishing Ltd.

Full Text

Duke Authors

Cited Authors

  • White, RD; Gray, C; Mandelup, E; Amsden, JJ; Kaplan, DL; Omenetto, FG

Published Date

  • November 1, 2011

Published In

Volume / Issue

  • 21 / 11

Electronic International Standard Serial Number (EISSN)

  • 1361-6439

International Standard Serial Number (ISSN)

  • 0960-1317

Digital Object Identifier (DOI)

  • 10.1088/0960-1317/21/11/115014

Citation Source

  • Scopus