Influence of hydrogen functionalization on the fracture strength of graphene and the interfacial properties of graphene–polymer nanocomposite

Dewapriya, M.A.N.; Rajapakse, R. K. N. D.; Nigam, Nilima

doi:10.1016/j.carbon.2015.05.101

Cited by 35 publications

(14 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Specifically, in the terahertz frequency range, the effective electric conductivity, σ Σ , emerging from the coordinated motion of quasi-free electrons, can have an appreciable imaginary part. Furthermore, it has been predicted via numerical simulations that the decoration of graphene by chains of organic molecules may result in a dramatic alteration of σ Σ [13,26]. This prediction paves the way to unconventional means of controlling electronic transport.…”

Section: Motivation: Surface Plasmonicsmentioning

confidence: 98%

See 1 more Smart Citation

Dipole excitation of surface plasmon on a conducting sheet: Finite element approximation and validation

Maier

Margetis

Luskin

2017

Journal of Computational Physics

View full text Add to dashboard Cite

We formulate and validate a finite element approach to the propagation of a slowly decaying electromagnetic wave, called surface plasmon-polariton, excited along a conducting sheet, e.g., a single-layer graphene sheet, by an electric Hertzian dipole. By using a suitably rescaled form of time-harmonic Maxwell's equations, we derive a variational formulation that enables a direct numerical treatment of the associated class of boundary value problems by appropriate curl-conforming finite elements. The conducting sheet is modeled as an idealized hypersurface with an effective electric conductivity. The requisite weak discontinuity for the tangential magnetic field across the hypersurface can be incorporated naturally into the variational formulation. We carry out numerical simulations for an infinite sheet with constant isotropic conductivity embedded in two spatial dimensions; and validate our numerics against the closed-form exact solution obtained by the Fourier transform in the tangential coordinate. Numerical aspects of our treatment such as an absorbing perfectly matched layer, as well as local refinement and a posteriori error control are discussed.Keywords: Time-harmonic Maxwell's equations, finite element method, surface plasmon-polariton, weak discontinuity on hypersurface 2010 MSC: 65N30, 78M10, 78M30, 78A45

show abstract

Section: Motivation: Surface Plasmonicsmentioning

confidence: 98%

“…where we set E jz ≡ 0, B jx ≡ 0, and B jy ≡ 0 by symmetry; F jz (F = E, B) is the component perpendicular to the xy-plane. Equations (26) and (27) furnish the differential equation…”

Section: Exact Solution For 2d Infinite Conducting Sheetmentioning

confidence: 99%

Dipole excitation of surface plasmon on a conducting sheet: Finite element approximation and validation

Maier

Margetis

Luskin

2017

Journal of Computational Physics

View full text Add to dashboard Cite

show abstract

“…Therefore, a quantitative determination of the piezoelectric properties of the 2D graphene sheet to the 3D equivalent graphene layer requires specification of the interlayer spacing and packing, representing the electron distribution around it. We assumed 2D graphene sheet as an equivalent 3D graphene layer using an assumed interlayer separation of 3.4 Å as its thickness [57][58][59][60]. Once the dipole moment per atom for different radii of curvature of graphene is obtained, we can determine the dipole density (i.e., average curvature-induced polarization) using the following relation:…”

Section: Curvature Induced Piezoelectric Effectmentioning

confidence: 99%

Strain gradient polarization in graphene

Kundalwal

Meguid

Weng

2017

Carbon

117

View full text Add to dashboard Cite

“…Since the nanocomposite properties are closely related to the interfacial characteristics between CNT and the polymer matrix, researches have been done on the efficiency of interfacial stress transfer [11][12][13][14]. The stress transfer efficiency between a multi-wall CNT (MWCNT) and matrix was estimated through fragmentation method to be at least one order of magnitude larger in nanocomposite than in conventional fiber-reinforced composites [15].…”

Section: Introductionmentioning

confidence: 99%

Interfacial characteristics of a carbon nanotube-polyimide nanocomposite by molecular dynamics simulation

Jiang

Tallury²,

Qiu

et al. 2020

Nanotechnology Reviews

View full text Add to dashboard Cite

AbstractWith molecular dynamics simulations, nanocomposites were characterized that are comprised of a polyimide (PI) polymer and carbon nanotubes (CNTs) with the same outer diameter but with one, two, or three walls. The simulations indicate that the PI/CNT interaction is strong, regardless of the number of CNT walls, and that there is some degree of alignment of the PI chains near the CNT interface. As the number of CNT walls increased, the density of PI chains near the CNT interface also increased and the average radius of gyration of the PI chains decreased, and these observations were attributed to changes due to the intertube van der Waals interactions. From simulations of the constant force pullout process of the CNT from the PI matrix, the limiting pullout force was calculated to be higher for the triple-walled CNT than for the single-walled one. The interfacial shear strength of the nanocomposites was also calculated from the pullout energy, and the results indicate that increasing the number of walls is a critical factor for enhancing the interfacial stress transfer during tension.

show abstract

Influence of hydrogen functionalization on the fracture strength of graphene and the interfacial properties of graphene–polymer nanocomposite

Cited by 35 publications

References 44 publications

Dipole excitation of surface plasmon on a conducting sheet: Finite element approximation and validation

Dipole excitation of surface plasmon on a conducting sheet: Finite element approximation and validation

Strain gradient polarization in graphene

Interfacial characteristics of a carbon nanotube-polyimide nanocomposite by molecular dynamics simulation

Contact Info

Product

Resources

About