Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 6: Thin Films
CPP 6.1: Vortrag
Montag, 23. März 2009, 14:00–14:15, ZEU 160
Mimicry of natural structural colours — •Mathias Kolle1, Maik Scherer1, Heather Whitney2, and Ullrich Steiner1 — 1Cavendish Laboratories, University of Cambridge, UK — 2School of Biological Sciences, University of Bristol, UK
For many organisms in nature intense and distinctive colours play an important role in inter- and intra-species communication. The most impressive natural colours arise from micrometre- to nanometre-sized structures, which often consist of intrinsically transparent materials. Most of the underlying physical principles that create colour from mere transparent materials are well understood and the challenge lies in applying them to create artificial replicas of natural photonic structures
Outstanding structural colours result in general from a balanced combination of various optical effects. We aim to create coatings based on nature-similar structures that optimally exploit different optical effects such as multilayer interference, diffraction from lateral structures as well as fluorescence. Efficient, simple procedures such as nanoimprinting and nanosphere-lithography and a variety of polymers and inorganic materials are used and will be subject of this presentation. Structural colour coatings promise a wide range of applications only to mention unique labels in security applications to protect for instance credit cards, passports or banknotes from forgery.