A photo-responsive macroscopic switch was fabricated using a chiral azo-calix[4]arene derivative (FC4AD) functionalized silicon surface and exhibited selective and reversible recognition of (1R,2S)-1-amino-2-indanol through the variation of wettability. This photo-responsive device may have wide applications in controlled release of chiral drugs and in biosensors.
![Graphical abstract: A photo-responsive macroscopic switch constructed using a chiral azo-calix[4]arene functionalized silicon surface](http://hg.y866.cn/compound/lib/scimg/usr/1/C8CC01196F.jpg)