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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

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
DOI: 10.1038/s41467-018-08175-w
Zitationen: 56
Web of Science
Zitationen: 51
Cover der Publikation
Zugehörige Institution(en) am KIT 3D Matter Made to Order (3DMM2O)
Institut für Angewandte Physik (APH)
Institut für Biologische Grenzflächen (IBG)
Institut für Funktionelle Grenzflächen (IFG)
Institut für Nanotechnologie (INT)
Institut für Physikalische Chemie (IPC)
Institut für Technische Chemie und Polymerchemie (ITCP)
Zoologisches Institut (ZOO)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2019
Sprache Englisch
Identifikator ISSN: 2041-1723
KITopen-ID: 1000090446
HGF-Programm 47.02.06 (POF III, LK 01) Zellpopul.auf Biofunk.Oberflächen IFG
Weitere HGF-Programme 43.23.01 (POF III, LK 01) Advanced Optical Lithography+Microscopy
Erschienen in Nature Communications
Verlag Nature Research
Band 10
Heft 1
Seiten Article no 232
Projektinformation EXC 2082; 3DMM2O (DFG, DFG EXSTRAT, EXC 2082/1, zu FOR_APH_20_03_25+08-58-20)
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 16.01.2019
Nachgewiesen in Web of Science
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