Print Email Facebook Twitter On Untethered, Dual Magneto- and Photoresponsive Liquid Crystal Bilayer Actuators Showing Bending and Rotating Motion Title On Untethered, Dual Magneto- and Photoresponsive Liquid Crystal Bilayer Actuators Showing Bending and Rotating Motion Author Pilz da Cunha, Marina (Eindhoven University of Technology) Foelen, Yari (Eindhoven University of Technology) Engels, Tom A.P. (Eindhoven University of Technology) Papamichou, K. (TU Delft Novel Aerospace Materials) Hagenbeek, M. (TU Delft Aerospace Manufacturing Technologies) Debije, Michael G. (Eindhoven University of Technology) Schenning, Albert P.H.J. (Eindhoven University of Technology; South China Normal University) Date 2019-04-04 Abstract The integration of untethered, multi-stimuli responsive actuation into soft microrobotic devices is a goal in the development of “smart” materials. This manuscript reports on a dual-stimuli responsive bilayer actuator consisting of a light responsive liquid crystal network (LCN) and a magnetic responsive polydimethylsiloxane (PDMS) composite. This design is of facile fabrication with ample design freedom, using no additional adhesion layers. Untethered control of the bilayer permits motions including bending and rotation, steered individually or in synchronization. Through a systematic study the direct impact of the PDMS layer was elucidated on the light triggered rate of actuation and maximum deformation amplitude of the LCN film. The alignment (homeotropic or planar) of the LCN has a profound effect on the resulting bilayer actuation. It is demonstrated, both experimentally and theoretically, that the rates of sample heating and actuation are directly correlated and highlight the critical role of the PDMS as a heat sink. The maximum amplitude of displacement of the bilayer is tied to the stiffness, being inversely correlated to the PDMS thickness to the third power. These results give insights and provide straightforward design rules to fabricate bilayer actuators with programmed multi-responsive properties. Subject actuatorsmagnetic responsephotoresponsestimuli-responsive materials To reference this document use: http://resolver.tudelft.nl/uuid:c79bb6ed-4152-4daa-893e-2e97696eeaf3 DOI https://doi.org/10.1002/adom.201801604 ISSN 2195-1071 Source Advanced Optical Materials, 7 (7) Part of collection Institutional Repository Document type journal article Rights © 2019 Marina Pilz da Cunha, Yari Foelen, Tom A.P. Engels, K. Papamichou, M. Hagenbeek, Michael G. Debije, Albert P.H.J. Schenning Files PDF Cunha_et_al_2019_Advanced ... erials.pdf 1.57 MB Close viewer /islandora/object/uuid:c79bb6ed-4152-4daa-893e-2e97696eeaf3/datastream/OBJ/view