Spectral analysis of induced color change on periodically nanopatterned silk films.

Journal Article (Journal Article)

We demonstrate controllable structural color based on periodic nanopatterned 2D lattices in pure protein films of silk fibroin. We show here periodic lattices in silk fibroin films with feature sizes of hundreds of nanometers that exhibit different colors as a function of varying lattice spacing. Further, when varying the index of refraction contrast between the nanopatterned lattice and its surrounding environment by applying liquids on top of the lattices, colorimetric shifts are observed. The effect is characterized experimentally and theoretically and a simple example of glucose concentration sensing is presented. This is the first example of a functional sensor based on silk fibroin optics.

Full Text

Duke Authors

Cited Authors

  • Amsden, JJ; Perry, H; Boriskina, SV; Gopinath, A; Kaplan, DL; Dal Negro, L; Omenetto, FG

Published Date

  • November 2009

Published In

Volume / Issue

  • 17 / 23

Start / End Page

  • 21271 - 21279

PubMed ID

  • 19997366

Electronic International Standard Serial Number (EISSN)

  • 1094-4087

International Standard Serial Number (ISSN)

  • 1094-4087

Digital Object Identifier (DOI)

  • 10.1364/oe.17.021271


  • eng