Programmable self-assembling 3D architectures generated by patterning of swellable MOF-based composite films
Troyano, Javier (Institut Català de Nanociència i Nanotecnologia)
Carné-Sánchez, Arnau (Institut Català de Nanociència i Nanotecnologia)
Maspoch Comamala, Daniel (Institut Català de Nanociència i Nanotecnologia)

Data:	2019
Resum:	The integration of swellable metal-organic frameworks (MOFs) into polymeric composite films is a straightforward strategy to develop soft materials that undergo reversible shape transformations derived from the intrinsic flexibility of MOF crystals. However, a crucial step toward their practical application relies on the ability to attain specific and programmable actuation, which enables the design of self-shaping objects on demand. Herein, a chemical etching method is demonstrated for the fabrication of patterned composite films showing tunable self-folding response, predictable and reversible 2D-to-3D shape transformations triggered by water adsorption/desorption. These films are fabricated by selective removal of swellable MOF crystals allowing control over their spatial distribution within the polymeric film. Upon exposure to moisture, various programmable 3D architectures, which include a mechanical gripper, a lift, and a unidirectional walking device, are generated. Remarkably, these 2D-to-3D shape transformations can be reversed by light-induced desorption. The reported strategy offers a platform for fabricating flexible MOF-based autonomous soft mechanical devices with functionalities for micromanipulation, automation, and robotics.
Ajuts:	European Commission 615954 Ministerio de Economía y Competitividad SEV-2017-0706 Ministerio de Economía y Competitividad IJCI-2016-29802 Ministerio de Economía y Competitividad MAT2015-65354-C2-1-R
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Composite film ; Metal-organic framework ; Self-folding ; Smart material ; Stimulus-response
Publicat a:	Advanced materials, Vol. 31, issue 21 (May 2019) , art. 1808235, ISSN 1521-4095

DOI: 10.1002/adma.201808235

Postprint 19 p, 916.6 KB

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