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DOI: 10.5445/IR/1000090446
Veröffentlicht am 01.02.2019

Controlling the shape of 3D microstructures by temperature and light

Hippler, Marc; Blasco, Eva; Qu, Jingyuan; Tanaka, Motomu; Barner-Kowollik, Christopher; Wegener, Martin; Bastmeyer, Martin

Abstract:
Stimuli-responsive microstructures are critical to create adaptable systems in soft robotics and biosciences. For such applications, the materials must be compatible with aqueous environments and enable the manufacturing of three-dimensional structures. Poly(N-isopropylacrylamide) (pNIPAM) is a well-established polymer, exhibiting a substantial response to changes in temperature close to its lower critical solution temperature. To create complex actuation patterns, materials that react differently with respect to a stimulus are required. Here, we introduce functional three-dimensional hetero-microstructures based on pNIPAM. By variation of the local exposure dose in three-dimensional laser lithography, we demonstrate that the material parameters can be altered on demand in a single resist formulation. We explore this concept for sophisticated three-dimensional architectures with large-amplitude and complex responses. The experimental results are consistent with numerical calculations, able to predict the actuation response. Furthermore, a spatially controlled response is achieved by inducing a local temperature increase by two-photo ... mehr


Zugehörige Institution(en) am KIT Institut für Funktionelle Grenzflächen (IFG)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 2041-1723
URN: urn:nbn:de:swb:90-904469
KITopen-ID: 1000090446
Erschienen in Nature Communications
Band 10
Heft 1
Seiten Article no 232
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 16.01.2019
Nachgewiesen in Web of Science
Scopus
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