Folding creases through bending

Al-Mulla, Talal; Buehler, Markus J.

doi:10.1038/nmat4258

Cited by 20 publications

(17 citation statements)

References 10 publications

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“…After folding across a planar 5−7 domain boundary as shown in Fig. 4C, two tubular structures can be clearly resolved with tube indices (9,4) and (10,3) for the top and bottom segments, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Atomically precise, custom-design origami graphene nanostructures

Chen

Zhang

et al. 2019

Science

172

127

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Correspondence to: hjgao@iphy.ac.cn, sxdu@iphy.ac.cn †These authors contributed equally to this work.The construction of atomically-precise carbon nanostructures holds promise for developing novel materials for scientific study and nanotechnology applications. Here we show that graphene origami is an efficient way to convert graphene into atomically-precise, complex, and novel nanostructures. By scanning-tunneling-microscope manipulation at low temperature, we repeatedly fold and unfold graphene nanoislands (GNIs) along arbitrarily chosen direction. A bilayer graphene stack featuring a tunable twist angle and a tubular edge connection between the layers are formed. Folding single-crystal GNIs creates tubular edges with specified chirality and onedimensional electronic features similar to those of carbon nanotubes, while folding bicrystal GNIs creates well-defined intramolecular junctions. Both origami structural models and electronic band structures were computed to complement analysis of the

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Section: Resultsmentioning

confidence: 99%

“…Origami, the ancient art of paper folding, has been widely used in diverse areas, from architecture to battery design and DNA nanofabrication (10). It has also inspired the fabrication or simulation of macroscale origami graphene structures and devices (11)(12)(13)(14)(15)(16)(17)(18)(19)(20), even machines (21).…”

mentioning

confidence: 99%

Atomically precise, custom-design origami graphene nanostructures

Chen

Zhang

et al. 2019

Science

172

127

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“…They are essentially based on the plate‐and‐hinge mechanism, which are plates linked by compliant hinges to form intricate geometries with tunable deformation mechanisms, allowing for zero energy, free motion. The designability of such origami/kirigami‐inspired metamaterials allow them to potentially be used in a variety of applications, such as in mechanical parts (e.g., pulleys, levers, gears, and linkages), electronic devices, medical stents, DNA nanofabrication, and the popular shape morphing materials …”

Section: Utilizing Architecture Size Effect and Mechanismmentioning

confidence: 99%

“…This is because the four‐fold rotational symmetry of the structure dictates a cyclic set of geometric constraints on the creases that define the central square facet. However, Silverberg et al have proposed a model which is foldable by utilizing the plastic deformation induced by facet bending (Figure ) . Thus, the proposed square‐twist model has two distinct deformation modes: creasing and facet bending.…”

Section: Utilizing Architecture Size Effect and Mechanismmentioning

confidence: 99%

Mechanical Metamaterials and Their Engineering Applications

et al. 2019

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In the past decade, mechanical metamaterials have garnered increasing attention owing to its novel design principles which combine the concept of hierarchical architecture with material size effects at micro/nanoscale. This strategy is demonstrated to exhibit superior mechanical performance that allows us to colonize unexplored regions in the material property space, including ultrahigh strength-to-density ratios, extraordinary resilience, and energy absorption capabilities with brittle constituents. In the recent years, metamaterials with unprecedented mechanical behaviors such as negative Poisson's ratio, twisting under uniaxial forces, and negative thermal expansion are also realized. This paves a new pathway for a wide variety of multifunctional applications, for example, in energy storage, biomedical, acoustics, photonics, and thermal management. Herein, the fundamental scientific theories behind this class of novel metamaterials, along with their fabrication techniques and potential engineering applications beyond mechanics are reviewed. Explored examples include the recent progresses for both mechanical and functional applications. Finally, the current challenges and future developments in this emerging field is discussed as well.

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“…Origami is now a topic of rapidly growing interest in the scientific and engineering research communities due to its potential for use in a broad range of applications, from self‐folding microelectronics, deformable batteries, and reconfigurable metamaterials, to artificial DNA constructs . Important recent advances in the fundamental aspects of origami include the identification of mechanisms for bistability in deformed configurations, and the development of lattice kirigami (a variant of origami that involves both cutting and folding) methods that solve the inverse problem of folding a flat plate into a complex targeted 3D configuration . In parallel, experimental methods are emerging for the assembly of origami structures at the micro/nanoscale.…”

Section: Introductionmentioning

confidence: 99%

Controlled Mechanical Buckling for Origami‐Inspired Construction of 3D Microstructures in Advanced Materials

Yan

Zhang

Wang

et al. 2016

Adv Funct Materials

238

228

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Origami is a topic of rapidly growing interest in both the scientific and engineering research communities due to its promising potential in a broad range of applications. Previous assembly approaches of origami structures at the micro/nanoscale are constrained by the applicable classes of materials, topologies and/or capability of control over the transformation. Here, we introduce an approach that exploits controlled mechanical buckling for autonomic origami assembly of 3D structures across material classes from soft polymers to brittle inorganic semiconductors, and length scales from nanometers to centimeters. This approach relies on a spatial variation of thickness in the initial 2D structures as an effective strategy to produce engineered folding creases during the compressive buckling process. The elastic nature of the assembly scheme enables active, deterministic control over intermediate states in the 2D to 3D transformation in a continuous and reversible manner. Demonstrations include a broad set of 3D structures formed through unidirectional, bidirectional, and even hierarchical folding, with examples ranging from half cylindrical columns and fish scales, to cubic boxes, pyramids, starfish, paper fans, skew tooth structures, and to amusing system-level examples of soccer balls, model houses, cars, and multi-floor textured buildings.

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Folding creases through bending

Cited by 20 publications

References 10 publications

Atomically precise, custom-design origami graphene nanostructures

Atomically precise, custom-design origami graphene nanostructures

Mechanical Metamaterials and Their Engineering Applications

Controlled Mechanical Buckling for Origami‐Inspired Construction of 3D Microstructures in Advanced Materials

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