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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-photon absorption of focused light.

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Verlagsausgabe §
DOI: 10.5445/IR/1000090446
Veröffentlicht am 01.02.2019
Originalveröffentlichung
DOI: 10.1038/s41467-018-08175-w
Scopus
Zitationen: 6
Web of Science
Zitationen: 5
Coverbild
Zugehörige Institution(en) am KIT Institut für Angewandte Physik (APH)
Institut für Technische Chemie und Polymerchemie (ITCP)
Institut für Physikalische Chemie (IPC)
Zoologisches Institut (ZOO)
Institut für Funktionelle Grenzflächen (IFG)
Institut für Nanotechnologie (INT)
Institut für Biologische Grenzflächen (IBG)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 2041-1723
urn:nbn:de:swb:90-904469
KITopen-ID: 1000090446
HGF-Programm 47.02.06 (POF III, LK 01)
Erschienen in Nature Communications
Band 10
Heft 1
Seiten Article no 232
Projektinformation 3DMM2O (DFG, DFG EXSTRAT, EXC 2082/1)
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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