Transfer Printing of Self-Folding Polymer–Metal Bilayer Particles

Leon, Al de; Barnes, Andrew; Thomas, Patrick; O'Donnell, J.H.; Zorman, Christian A.

doi:10.1021/am5068172

Cited by 12 publications

(9 citation statements)

References 33 publications

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“…So far, many stimuli‐responsive polymers have been investigated and employed to fabricate 3D structures including hydrogels,9 shape memory polymers,10 thermoresponsive polymers,11 and gradient polymeric composites 12. Moreover, the frequently used external stimuli to trigger a shape change in stimuli‐responsive polymers include solvents,13 electricity,14 pneumatic stimulus,15 mechanical stimulus,16 heat,17 and light 18. Electrical stimuli allow sequential folding with high accuracy, but the structures must be wired to external controls.…”

Section: Introductionmentioning

confidence: 99%

Graphene‐Based Polymer Bilayers with Superior Light‐Driven Properties for Remote Construction of 3D Structures

et al. 2017

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3D structure assembly in advanced functional materials is important for many areas of technology. Here, a new strategy exploits IR light‐driven bilayer polymeric composites for autonomic origami assembly of 3D structures. The bilayer sheet comprises a passive layer of poly(dimethylsiloxane) (PDMS) and an active layer comprising reduced graphene oxides (RGOs), thermally expanding microspheres (TEMs), and PDMS. The corresponding fabrication method is versatile and simple. Owing to the large volume expansion of the TEMs, the two layers exhibit large differences in their coefficients of thermal expansion. The RGO‐TEM‐PDMS/PDMS bilayers can deflect toward the PDMS side upon IR irradiation via the cooperative effect of the photothermal effect of the RGOs and the expansion of the TEMs, and exhibit excellent light‐driven, a large bending deformation, and rapid responsive properties. The proposed RGO‐TEM‐PDMS/PDMS composites with excellent light‐driven bending properties are demonstrated as active hinges for building 3D geometries such as bidirectionally folded columns, boxes, pyramids, and cars. The folding angle (ranging from 0° to 180°) is well‐controlled by tuning the active hinge length. Furthermore, the folded 3D architectures can permanently preserve the deformed shape without energy supply. The presented approach has potential in biomedical devices, aerospace applications, microfluidic devices, and 4D printing.

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Section: Introductionmentioning

confidence: 99%

Graphene‐Based Polymer Bilayers with Superior Light‐Driven Properties for Remote Construction of 3D Structures

et al. 2017

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“…The simplest way to achieve such heterogeneity is via assembly of (multi)bilayers built from components that differ in their swelling properties. [2,9] However, such bilayer structures typically show weak interfacial adhesion; consequently, they tend to delaminate after repetitive actuation. Moreover, shape-transformations of (multi)bilayers are limited to self-rolling structures (e.g.…”

mentioning

confidence: 99%

Programmable Self‐Assembling 3D Architectures Generated by Patterning of Swellable MOF‐Based Composite Films

2019

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The integration of swellable MOFs into polymeric composite films is a straightforward strategy to develop soft materials which undergo reversible shape transformations derived from the intrinsic flexibility of MOF crystals. However, a crucial step towards their practical application relies in 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 the control over their spatial distribution within the polymeric film. Upon exposure to moisture, various programmable 3D architectures that 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.

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“…Although this review focuses on the folding of metals, and specifically on self‐folding mechanisms driven by the metals themselves, it is important to mention that metals can also be induced to fold by incorporating them on other actuation layers such as polymers. One approach is to use a polymer film in a thermal bimorph film stack, as described previously (e.g., in studies by Luo et al and de Leon et al). Alternatively, the metal layer, if sufficiently thin, can conform to polymer actuators and deform along with the polymer.…”

Section: Actuation Mechanismsmentioning

confidence: 99%

Self‐Folding Metal Origami

Lazarus

Smith

Dickey

2019

Advanced Intelligent Systems

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Origami‐based techniques for creating 3D shapes from 2D patterns via folding have moved from the domain of art to practical engineering. Flat sheets are an appealing starting material for the creation of 3D objects because of 1) the ability to efficiently store and ship stacks of sheets, 2) the compatibility of flat surfaces with a variety of patterning processes such as lithography, and 3) the ability to make sheets via high‐throughput manufacturing. Self‐folding is the ability of flat sheets of materials to respond to external stimuli (light, heat, magnetic fields, etc.) and rapidly change shape without human intervention. Herein, the self‐folding of metals is reviewed, which is particularly important for opening up new applications in robotics, medicine, and reconfigurable electronics. These applications rely on the superior thermal, mechanical, and electrical properties of metals compared with polymer alternatives. The field is reviewed from actuation mechanisms and materials to design approaches and common applications of technologies.

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Transfer Printing of Self-Folding Polymer–Metal Bilayer Particles

Cited by 12 publications

References 33 publications

Graphene‐Based Polymer Bilayers with Superior Light‐Driven Properties for Remote Construction of 3D Structures

Graphene‐Based Polymer Bilayers with Superior Light‐Driven Properties for Remote Construction of 3D Structures

Programmable Self‐Assembling 3D Architectures Generated by Patterning of Swellable MOF‐Based Composite Films

Self‐Folding Metal Origami

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