Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 3, Issue 42, Pages 11011-11016Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc01776a
Keywords
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Funding
- Academy of Finland [135159, 135106]
- Academy of Finland through Centers of Excellence Programme
- Emil Aaltonen Foundation
- Academy Research Fellowship program
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The ability to control surface functionality by optical inscription and erasure of surface patterns is highly appealing, since it opens up the possibility for the design of complex, spatially varying surface topographies. We show through a supramolecular approach, which allows us to attach nominally equal amounts of azobenzene into polymers of varying molecular weight, that the completeness of optical erasure of high-modulation-depth surface-relief gratings on polymer-azobenzene complexes depends on the molecular weight of the polymer, and therefore on the glass transition temperature of the material used. The optical erasure is further applied to realize surface patterns with varying grating vector directions through masking. All patterning is done at a temperature well below the glass transition temperatures of the materials, which allows different patterning steps to be frozen into the material.
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