In this video, researchers add ammonium chloride in solution to the tunable gel, changing the gel's color. Washing the ammonium chloride away returns the gel to its original color.
Video / Youngjong Kang
See the press release here:
http://web.mit.edu/newsoffice/2007/lightgels-1021.html
Chemistry World blog:
http://www.chemistryworld.org/blog
The way these polymers work is damn ingenious! Lovely invention. MIT is indeed the best!
Erupizza 4 years ago