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Issue 10, 2007
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Photo-mechanical effects in azobenzene-containing soft materials

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The change in shape inducible in some photo-reversible molecules using light can effect powerful changes to a variety of properties of a host material. The most ubiquitous natural molecule for reversible shape change is the rhodopsin–retinal protein system that enables vision, and this is perhaps the quintessential reversible photo-switch. Perhaps the best artificial mimic of this strong photo-switching effect however, for reversibility, speed, and simplicity of incorporation, is azobenzene. This review focuses on the study and application of reversible changes in shape that can be achieved with various systems incorporating azobenzene. This photo-mechanical effect can be defined as the reversible change in shape inducible in some molecules by the adsorption of light, which results in a significant macroscopic mechanical deformation of the host material. Thus, it does not include simple thermal expansion effects, nor does it include reversible but non-mechanical photo-switching or photo-chemistry, nor any of the wide range of optical and electro-optical switching effects for which good reviews exist elsewhere.

Graphical abstract: Photo-mechanical effects in azobenzene-containing soft materials

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Publication details

The article was received on 13 Apr 2007, accepted on 25 Jul 2007 and first published on 16 Aug 2007

Article type: Review Article
DOI: 10.1039/B705619B
Soft Matter, 2007,3, 1249-1261

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    Photo-mechanical effects in azobenzene-containing soft materials

    C. J. Barrett, J. Mamiya, K. G. Yager and T. Ikeda, Soft Matter, 2007, 3, 1249
    DOI: 10.1039/B705619B

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