Garret M. Miyake, Victoria A. Piunova, Raymond A. Weitekamp, and Robert H. Grubbs
http://onlinelibrary.wiley.com/doi/10.1002/anie.201205743/full
The researchers synthesized block copolymers consisting of equal amounts
of norbornene functionalized hexyl isocyanate and 4-phenyl butyl
isocyanate macromonomers of two different molecular weights. A blend of
two block polymer in which the ratio of the MW is less than five will
lead to the self-assembly of photonic crystals. By varying the amount of
the smaller and larger block copolymer, a change in the wavelength of
reflectivity was observed, with increasing amounts of the larger block
resulting in longer wavelengths of reflectivity.
No comments:
Post a Comment