Effect of Uniaxial Stress on the Raman Spectra of Graphite Fibers.

Sakata, H.; Dresselhaus, G.; Dresselhaus, M. S.; Endo, M.

doi:10.21236/ada191730

Cited by 9 publications

(24 citation statements)

References 8 publications

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“…The hydrostatic deformation preserves the symmetry of the crystal, so it does not lead to splitting. The shear deformation potential β E2g is defined analogously 37,182 :β E2g = (1/Ω E2g )(∂∆Ω E2g /∂ε s ), where ε s = ε ll − ε tt is the strain shear component, and ∆Ω The phonon displacements corresponding to the G ± peaks are orthogonal 37,182,183 : E + 2g is perpendicular to the strain (thus experiencing smaller softening), and E − 2g parallel ( Fig. S3e).…”

Section: S7 Magnetic Fieldmentioning

confidence: 99%

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Raman spectroscopy as a versatile tool for studying the properties of graphene

2013

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Raman spectroscopy is an integral part of graphene research. It is used to determine the number and orientation of layers, the quality and types of edge, and the effects of perturbations, such as electric and magnetic fields, strain, doping, disorder and functional groups. This, in turn, provides insight into all sp(2)-bonded carbon allotropes, because graphene is their fundamental building block. Here we review the state of the art, future directions and open questions in Raman spectroscopy of graphene. We describe essential physical processes whose importance has only recently been recognized, such as the various types of resonance at play, and the role of quantum interference. We update all basic concepts and notations, and propose a terminology that is able to describe any result in literature. We finally highlight the potential of Raman spectroscopy for layered materials other than graphene.

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Section: S7 Magnetic Fieldmentioning

confidence: 99%

“…E2g sis the splitting due to shear. Under uniaxial strain the shifts of the G ± peaks are37,182,183 :∆Pos(G ± ) = ∆Ω − γ E2g Ω E2g (ε ll + ε tt ) ± β E2g Ω E2g ε ll − ε tt 2 . (S10)Ref 37.…”

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confidence: 99%

Raman spectroscopy as a versatile tool for studying the properties of graphene

2013

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“…Raman spectra of the skin and core regions may therefore also exhibit differences (Morita et al, 1986). The effect of deformation on the Raman spectra of carbon fibres has been reported (Robinson et al, 1987c;Galiotis & Batchelder, 1988;Sakata et al, 1988). Robinson et al ( 1 9 8 7~) have shown that changes can be observed for polyacrylonitrile-(PAN-), pitch-and Rayon-based fibres.…”

Section: Inorganic Fibresmentioning

confidence: 94%

Raman microscopy of fibres and composites

Day

Young

1993

Journal of Microscopy

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SUMMARY Some of the progress made in using Raman microscopy to examine the structure and micromechanics of polymer and inorganic fibres is reviewed. Examples of how the technique has been used to verify some of the theories of composite reinforcement are then given. Finally, a specific example of how Raman microscopy has been used, in conjuction with other approaches, to understand the micromechanics of the microbond test, which is often used to measure interfacial shear strength in composite systems, is presented.

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“…Conventional straining methods such as cantilever beams or diamond anvil cells achieved a maximum strain of about 1% or less [19][20][21][22] .…”

Section: Introductionmentioning

confidence: 99%

Tip-induced local strain on MoS2/graphite detected by inelastic electron tunneling spectroscopy

Hus

et al. 2018

Phys. Rev. B

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We report the detection of tip-induced local strain applied to the monolayer MoS 2 grown on a graphite substrate by scanning tunneling microscope (STM). Monolayer MoS 2 behaves as both mechanical and tunneling barriers that prevent the tip from contacting the graphite while maintaining the tunneling current. Inelastic tunneling electron spectroscopy (IETS) is utilized to probe the phonon modes in graphite. As the tip pushes the sample, IETS reveals a continuous phonon-softening in graphite, corroborated by a downward shift of the phonon energy as calculated by density functional theory. Our results demonstrate a novel way to apply local mechanical strain and simultaneously detect the induced change in phonon modes by unitizing IETS with two-dimensional materials as a tunneling barrier.

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Effect of Uniaxial Stress on the Raman Spectra of Graphite Fibers.

Cited by 9 publications

References 8 publications

Raman spectroscopy as a versatile tool for studying the properties of graphene

Raman spectroscopy as a versatile tool for studying the properties of graphene

Raman microscopy of fibres and composites

Tip-induced local strain on MoS2/graphite detected by inelastic electron tunneling spectroscopy

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