@article {836976, title = {Reversible Switching of Hydrogel-Actuated Nanostructures into Complex Micropatterns}, journal = {Science}, volume = {315}, year = {2007}, note = {We thank P. Kolodner, J. Weaver, I. Luzinov, and I. Sokolov for fruitful discussions. We thank R. Smith and N. Lippa for technical assistance. This work was supported in part by the Office of Naval Research, award N00014-05-1-0909.}, pages = {487-490}, author = {A. Sidorenko and T. Krupenkin and A. Taylor and P. Fratzl and Aizenberg, J.} }