Molecular crystal nanowires composed of an anthracene-9-(1,3-butadiene) derivative exhibit a rapid transition from straight to highly coiled structures when exposed to a pulse of visible light. The curling does not depend on the direction of light illumination and occurs for nanowires composed of either the E or Z isomer. The shape change is driven by an E⇄Z photoisomerization reaction that generates a mixture of isomers within a single nanowire.
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Al‐Muhanna et al. (2013) studied this question.
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