Abstract

Low molecular weight gels can be responsive to a range of external stimuli. The use of light as an external stimulus to modify gels is of particular interest for a number of reasons. Light is a non-invasive trigger. For example, using light it is possible to spatially target a specific area of the gel leading to patterned gel surfaces. Here, we review the different approaches that have been used to form low molecular weight gels that respond to light.

Highlights

  • Gels are a class of soft materials that are used in many areas, from foods to electronics

  • A final class of gel is formed by the self-assembly of low molecular weight gelators (LMWG, Fig. 1).[6,7,8,9,10,11]

  • A potential advantage of gels formed from LMWG compared to chemically cross-linked polymeric hydrogelators is that the gelation is usually reversible.[11]

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Summary

Photoresponsive gelators

Low molecular weight gels can be responsive to a range of external stimuli. The use of light as an external stimulus to modify gels is of particular interest for a number of reasons. Using light it is possible to spatially target a specific area of the gel leading to patterned gel surfaces. We review the different approaches that have been used to form low molecular weight gels that respond to light

Introduction
Feature Article
Photoresponsive gels
Photoisomerisable gelators
Ring opening and closing
Photodimerisation and photopolymerisation
Findings
Conclusions and outlook
Full Text
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