Controlled ripple texturing of suspended graphene and ultrathin graphite membranes

Bao, Wenzhong; Miao, Feng; Chen, Zhen; Zhang, Hang; Jang, Wanyoung; Dames, Chris; Lau, Chun Ning

doi:10.1038/nnano.2009.191

Cited by 1,230 publications

(1,243 citation statements)

References 37 publications

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“…Wrinkles can also be generated by water drainage between graphene and substrate in the graphene transfer processes. The relation between wavelength () and amplitude () of wrinkles on suspended FLG resulted from longitudinal stretching strain [197] can be described by [198] …”

Section: Disorders In Graphene Structurementioning

confidence: 99%

“…However, the relation needs to be revised slightly when in-plane shear dominates the applied stress [198]: …”

Section: Disorders In Graphene Structurementioning

confidence: 99%

“…As the values of , , and can be measured from AFM images, plotting versus allows the determination of the type of applied stress [198]. When using the buckling theory to calculate the wrinkling wavelength of the pre-strained substrate-supported graphene thin film, the substrate is assumed to exhibit stress–strain behavior complying with Hooke’s law but be non-linear at large deformations, so we have: …”

Section: Disorders In Graphene Structurementioning

confidence: 99%

“…These strain-induced out-of-plane deformations, if controllable, may be used to tune the electrical and mechanical properties of graphene. The required strains can be created by exploiting difference in thermal expansion of graphene and a substrate [198], by adhering graphene on profiled substrates, by using suspended graphene and by depositing graphene over triangular trenches [352]. …”

Section: Modulation Of Structural Defects In Graphenementioning

confidence: 99%

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Structure of graphene and its disorders: a review

Gao

Lee

et al. 2018

Science and Technology of Advanced Materials

423

167

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Monolayer graphene exhibits extraordinary properties owing to the unique, regular arrangement of atoms in it. However, graphene is usually modified for specific applications, which introduces disorder. This article presents details of graphene structure, including sp2 hybridization, critical parameters of the unit cell, formation of σ and π bonds, electronic band structure, edge orientations, and the number and stacking order of graphene layers. We also discuss topics related to the creation and configuration of disorders in graphene, such as corrugations, topological defects, vacancies, adatoms and sp3-defects. The effects of these disorders on the electrical, thermal, chemical and mechanical properties of graphene are analyzed subsequently. Finally, we review previous work on the modulation of structural defects in graphene for specific applications.

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Section: Disorders In Graphene Structurementioning

confidence: 99%

“…However, the relation needs to be revised slightly when in-plane shear dominates the applied stress [198]: …”

Section: Disorders In Graphene Structurementioning

confidence: 99%

Section: Disorders In Graphene Structurementioning

confidence: 99%

Section: Modulation Of Structural Defects In Graphenementioning

confidence: 99%

See 2 more Smart Citations

Structure of graphene and its disorders: a review

Gao

Lee

et al. 2018

Science and Technology of Advanced Materials

423

167

View full text Add to dashboard Cite

show abstract

“…Graphene has been a promising material for various device applications since its discovery because of its superb electronic, thermal/chemical stability, and mechanical properties 22, 23, 24, 25, 26, 27. In recent years, carbon nanomaterial‐based multilayer polymeric actuators stimulated by light, electrochemical, and electric, etc., have attracted wide attention.…”

Section: Introductionmentioning

confidence: 99%

Construction of a Fish‐like Robot Based on High Performance Graphene/PVDF Bimorph Actuation Materials

et al. 2016

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Smart actuators have many potential applications in various areas, so the development of novel actuation materials, with facile fabricating methods and excellent performances, are still urgent needs. In this work, a novel electromechanical bimorph actuator constituted by a graphene layer and a PVDF layer, is fabricated through a simple yet versatile solution approach. The bimorph actuator can deflect toward the graphene side under electrical stimulus, due to the differences in coefficient of thermal expansion between the two layers and the converse piezoelectric effect and electrostrictive property of the PVDF layer. Under low voltage stimulus, the actuator (length: 20 mm, width: 3 mm) can generate large actuation motion with a maximum deflection of about 14.0 mm within 0.262 s and produce high actuation stress (more than 312.7 MPa/g). The bimorph actuator also can display reversible swing behavior with long cycle life under high frequencies. on this basis, a fish‐like robot that can swim at the speed of 5.02 mm/s is designed and demonstrated. The designed graphene‐PVDF bimorph actuator exhibits the overall novel performance compared with many other electromechanical avtuators, and may contribute to the practical actuation applications of graphene‐based materials at a macro scale.

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Graphene: Synthesis, Characterization, and Applications

Zhou

Zhang

2014

Kirk-Othmer Encyclopedia of Chemical Technology

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Since the breakthrough work by Geim and Novosolov in 2004, the investigation on graphene has grown as a result of graphene's unique electronic, mechanical, and chemical properties. To characterize single‐layer graphene, interfacial diffraction‐induced color difference was the first milestone in the graphene adventure, and then Raman spectroscopy, scanning probe microscopy, and transmission electron microscopy were used to identify the graphene layers. Apart from the Scotch tap legend, the massive production of graphene is important for graphene research and applications. The current preparation methods can be classified into top‐down (eg, chemical intercalation and liquid exfoliation) and bottom‐up (eg, chemical vapor deposition and, chemical total synthesis) strategies. The massive production of graphene has enabled researchers to explore graphene in a variety of applications, for instance, energy conversion and storage, sensor, reinforcement, catalysis, separation, and so on. Meanwhile, inspired by the legend of graphene, other layered materials are being investigated. Challenges and future perspectives in the studies of graphene and other quasi‐two‐dimensional nanomaterials are discussed.

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Controlled ripple texturing of suspended graphene and ultrathin graphite membranes

Cited by 1,230 publications

References 37 publications

Structure of graphene and its disorders: a review

Structure of graphene and its disorders: a review

Construction of a Fish‐like Robot Based on High Performance Graphene/PVDF Bimorph Actuation Materials

Graphene: Synthesis, Characterization, and Applications

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