Journal
SMALL
Volume 14, Issue 50, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201803274
Keywords
configurable surface actuation; fluorinated azobenzenes; multistable topographies; visible light responsive liquid crystal networks
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Funding
- Netherlands Organization for Scientific Research (NWO-Top Punt Grant) [10018944]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program [669991]
- NWO (VIDI Grant) [723.012.106]
- Light4Function ERC [308117]
- German Research Foundation [BL 1269/1]
- European Research Council (ERC) [308117] Funding Source: European Research Council (ERC)
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Light responsive materials that are able to change their shape are becoming increasingly important. However, preconfigurable bistable or even multi-stable visible light responsive coatings have not been reported yet. Such materials will require less energy to actuate and will have a longer lifetime. Here, it is shown that fluorinated azobenzenes can be used to create rewritable and pre-configurable responsive surfaces that show multi-stable topographies. These surface structures can be formed and removed by using low intensity green and blue light, respectively. Multistable preconfigured surface topographies can also be created in the absence of a mask. The method allows for full control over the surface structures as the topographical changes are directly linked to the molecular isomerization processes. Preliminary studies reveal that these light responsive materials are suitable as adaptive biological surfaces.
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