Molecular dynamics modeling and simulation of a graphene-based nanoelectromechanical resonator

Kang, Jeong Won; Kim, Hag-Wone; Kim, Ki-Sub; Lee, Jun Ha

doi:10.1016/j.cap.2012.12.007

Cited by 38 publications

(13 citation statements)

References 66 publications

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“…Combining multi-mode opto-mechanical tomography and hyperspectral Raman mapping on larger graphene drums (effectively leading to a higher spatial resolution) would allow us to test whether localisation of harmonics occurs in graphene and to possibly correlate this phenomenon to the dynamically-induced strain field. More generally, unravelling the origin of the anomalously large ε d may require microscopic models that may go beyond elasticity theory 54 and explicitly take into account the ultimate thinness and atomic structure of graphene 55 , 56 .…”

Section: Discussionmentioning

confidence: 99%

Dynamically-enhanced strain in atomically thin resonators

et al. 2020

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Graphene and related two-dimensional (2D) materials associate remarkable mechanical, electronic, optical and phononic properties. As such, 2D materials are promising for hybrid systems that couple their elementary excitations (excitons, phonons) to their macroscopic mechanical modes. These built-in systems may yield enhanced strain-mediated coupling compared to bulkier architectures, e.g., comprising a single quantum emitter coupled to a nano-mechanical resonator. Here, using micro-Raman spectroscopy on pristine monolayer graphene drums, we demonstrate that the macroscopic flexural vibrations of graphene induce dynamical optical phonon softening. This softening is an unambiguous fingerprint of dynamically-induced tensile strain that reaches values up to ≈4 × 10−4 under strong non-linear driving. Such non-linearly enhanced strain exceeds the values predicted for harmonic vibrations with the same root mean square (RMS) amplitude by more than one order of magnitude. Our work holds promise for dynamical strain engineering and dynamical strain-mediated control of light-matter interactions in 2D materials and related heterostructures.

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Section: Discussionmentioning

confidence: 99%

Dynamically-enhanced strain in atomically thin resonators

et al. 2020

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“…Graphene is one of the most important materials with extraordinary properties due to the unique atom-thick honeycomb-like 2D carbon crystalline structure with quantum confinement. As a consequence, tremendous applications, such as graphene composites, nano-switches [155], resonators [156], and even motors [157], were developed based on its outstanding mechanical The mechanical properties of GO were first reported by Dikin et al [152]. The stress distribution across the material was homogeneous and the stiffness was found to be up to 40 GPa, while the strength was only 120 MPa.…”

Section: Discussionmentioning

confidence: 99%

A Review of Current Development of Graphene Mechanics

et al. 2018

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Graphene, a two-dimensional carbon in honeycomb crystal with single-atom thickness, possesses extraordinary properties and fascinating applications. Graphene mechanics is very important, as it relates to the integrity and various nanomechanical behaviors including flexing, moving, rotating, vibrating, and even twisting of graphene. The relationship between the strain and stress plays an essential role in graphene mechanics. Strain can dramatically influence the electronic and optical properties, and could be utilized to engineering those properties. Furthermore, graphene with specific kinds of defects exhibit mechanical enhancements and thus the electronic enhancements. In this short review, we focus on the current development of graphene mechanics, including tension and compression, fracture, shearing, bending, friction, and dynamics properties of graphene from both experiments and numerical simulations. We also touch graphene derivatives, including graphane, graphone, graphyne, fluorographene, and graphene oxide, which carve some fancy mechanical properties out from graphene. Our review summarizes the current achievements of graphene mechanics, and then shows the future prospects.

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“…Nowadays, the reduction of devices and the demand for low consumption of power in of nano electromechanical systems (NEMS) have been considered. Graphene with high young's modulus and as well as higher elasticity than other materials is used in NEMS [21]. Therefore, the production of low pull‐in voltage graphene‐based NEMS switches can be applicable.…”

Section: Methodsmentioning

confidence: 99%