Highly Anisotropic Adhesive Film Made from Upside-Down, Flat, and Uniform Vertically Aligned CNTs

Hong, Suk Ki; Lundstrom, Troy; Ghosh, Ranajay; Abdi, Hamed; Hao, Ji; Jeoung, Sun Kyoung; Su, Paul; Suhr, Jonghwan; Vaziri, Ashkan; Jalili, Nader; Jung, Yung Joon

doi:10.1021/acsami.6b10395

Cited by 13 publications

(17 citation statements)

References 26 publications

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“…Nevertheless, considering the difficulty in engineering synthesis of large-area and high-quality graphene, so far, there is little practical application of industrially produced graphene. Consequently, it is worth focusing on allotropes of graphene [11,12,13], which are more stable and feasible to produce. Recently, a stable carbon allotrope, namely, carbon honeycomb (CHC), a three-dimensional graphene, was synthesized.…”

Section: Introductionmentioning

confidence: 99%

Atomistic Study of Mechanical Behaviors of Carbon Honeycombs

et al. 2019

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With an ultralarge surface-to-volume ratio, a recently synthesized three-dimensional graphene structure, namely, carbon honeycomb, promises important engineering applications. Herein, we have investigated, via molecular dynamics simulations, its mechanical properties, which are inevitable for its integrity and desirable for any feasible implementations. The uniaxial tension and nanoindentation behaviors are numerically examined. Stress–strain curves manifest a transformation of covalent bonds of hinge atoms when they are stretched in the channel direction. The load–displacement curve in nanoindentation simulation implies the hardness and Young’s modulus to be 50.9 GPa and 461±9 GPa, respectively. Our results might be useful for material and device design for carbon honeycomb-based systems.

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Section: Introductionmentioning

confidence: 99%

Atomistic Study of Mechanical Behaviors of Carbon Honeycombs

et al. 2019

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“…This friction can originate from microscale asperities, rough surface features, or specially engineered surface morphologies 37,38 . Therefore, friction coefficient can increase depending on the specific choice of material or specially engineered surfaces 39 .…”

Section: Methodsmentioning

confidence: 99%

Frictional Damping from Biomimetic Scales

Ali

Ebrahimi

Ghosh

2019

Sci Rep

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Stiff scales adorn the exterior surfaces of fishes, snakes, and many reptiles. They provide protection from external piercing attacks and control over global deformation behavior to aid locomotion, slithering, and swimming across a wide range of environmental condition. In this report, we investigate the dynamic behavior of biomimetic scale substrates for further understanding the origins of the nonlinearity that involve various aspect of scales interaction, sliding kinematics, interfacial friction, and their combination. Particularly, we study the vibrational characteristics through an analytical model and numerical investigations for the case of a simply supported scale covered beam. Our results reveal for the first time that biomimetic scale beams exhibit viscous damping behavior even when only Coulomb friction is postulated for free vibrations. We anticipate and quantify the anisotropy in the damping behavior with respect to curvature. We also find that unlike static pure bending where friction increases bending stiffness, a corresponding increase in natural frequency for the dynamic case does not arise for simply supported beam. Since both scale geometry, distribution and interfacial properties can be easily tailored, our study indicates a biomimetic strategy to design exceptional synthetic materials with tailorable damping behavior.

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“…[40] Unlike randomly dispersed CNT/polymer nanocomposites, the alignment of CNTs in a polymer matrix can provide anisotropic conducting paths along the direction of heat and electric transport, facilitating the fabrication of soft actuators with good mechanical output. [41] Therefore, composite actuators with anisotropic CNT alignment have attracted significant attention. Li et al reported a flexible actuator based on superoriented CNT paper and polymer film.…”

Section: Introductionmentioning

confidence: 99%

Dual‐Responsive Soft Actuator Based on Aligned Carbon Nanotube Composite/Graphene Bimorph for Bioinspired Applications

Wang

2021

Macro Materials & Eng

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Nanocarbon‐based polymer actuators have attracted significant attention because of their excellent actuation performance. In this study, a soft bimorph actuator composed of an anisotropic carbon nanotube (CNT)–polymer composite and reduced graphene oxide (rGO) film is fabricated by a simple blade‐coating method. Owing to the excellent electrical, optical, and thermal properties of the CNT and rGO, the actuator exhibits dual‐responsive actuation. It generates reversible bending deformation with a displacement of ≈13 mm under low electrical voltage stimulation or white light irradiation. Furthermore, because of the embedment of aligned CNTs in polymer matrix, this actuator exhibits excellent mechanical output compared with many of the reported nanocarbon‐based actuators. It can lift a 2.048 g clip to a height of ≈5 mm under low electrical voltage stimulation. Based on this soft actuator with dual response and good mechanical output, various bionic devices are designed. A bionic eagle claw that grasps a soft object under electrical stimulation and an artificial flower blooming in response to light irradiation are constructed. Moreover, a light‐driven smart curtain and a seagull robot are fabricated. These results reveal the great potential of the dual‐responsive anisotropic soft actuator in soft robots and smart devices driven by electricity and light.

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Highly Anisotropic Adhesive Film Made from Upside-Down, Flat, and Uniform Vertically Aligned CNTs

Cited by 13 publications

References 26 publications

Atomistic Study of Mechanical Behaviors of Carbon Honeycombs

Atomistic Study of Mechanical Behaviors of Carbon Honeycombs

Frictional Damping from Biomimetic Scales

Dual‐Responsive Soft Actuator Based on Aligned Carbon Nanotube Composite/Graphene Bimorph for Bioinspired Applications

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