Advanced Functional Materials

Cover image for Vol. 27 Issue 16

21_13b/2011Chemically Controlled Miniature Devices: Microchemomechanical Systems (Adv. Funct. Mater. 13/2011)

A new class of miniature micromechanical devices that do not utilize electricity but respond to different chemical environments are reviewed by David H. Gracias and coworkers on page 2395. The wireless device shown in the image, for example, opens/closes in response to surface oxidation and reduction. The intellectual motivation to pursue chemically stimulated devices is their wide occurrence in nature. From a practical standpoint, since chemicals can readily diffuse and produce changes over large distances, this approach is especially attractive for very small wireless and autonomous devices. (Image credit: A. Zarafshar and J. Randhawa)

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