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Soft nanocomposite electroadhesives for digital micro- and nanotransfer printing

Author(s)
Kim, Sanha; Boutilier, Michael Stephen Hatcher; Nayakanti, Nigamaa; Cao, Changhong; Jacob, Christine; Zhao, Hangbo; Hart, Anastasios John; ... Show more Show less
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Creative Commons Attribution NonCommercial License 4.0 https://creativecommons.org/licenses/by-nc/4.0/
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Abstract
Automated handling of microscale objects is essential for manufacturing of next-generation electronic systems. Yet, mechanical pick-and-place technologies cannot manipulate smaller objects whose surface forces dominate over gravity, and emerging microtransfer printing methods require multidirectional motion, heating, and/or chemical bonding to switch adhesion. We introduce soft nanocomposite electroadhesives (SNEs), comprising sparse forests of dielectric-coated carbon nanotubes (CNTs), which have electrostatically switchable dry adhesion. SNEs exhibit 40-fold lower nominal dry adhesion than typical solids, yet their adhesion is increased >100-fold by applying 30 V to the CNTs. We characterize the scaling of adhesion with surface morphology, dielectric thickness, and applied voltage and demonstrate digital transfer printing of films of Ag nanowires, polymer and metal microparticles, and unpackaged light-emitting diodes.
Date issued
2019-10
URI
https://hdl.handle.net/1721.1/124379
Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal
Science advances
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Kim, Sanha et al. "Soft nanocomposite electroadhesives for digital micro- and nanotransfer printing." Science advances 5 (2019): eaax4790 © 2019 The Author(s)
Version: Final published version
ISSN
2375-2548

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