Lattice disordering in graphite under rare-gas ion irradiation studied by Raman spectroscopy

Asari, E.; Kamioka, I.; Nakamura, Kazutaka G.; Kawabe, T.; Lewis, W. A.; Kitajima, Masahiro

doi:10.1103/physrevb.49.1011

Cited by 36 publications

(20 citation statements)

References 18 publications

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“…(2). These values are lower than those obtained for the same radiation at 3 keV [19,24] and can be explained by the increase in ion penetration depth, which at 5 keV is much closer to the optical skin depth; therefore a lower percentage of the Raman signal is from the undamaged region.…”

Section: Discussioncontrasting

confidence: 79%

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Ion-induced damage in graphite: A Raman study

Theodosiou

Carley

Taylor

2010

Journal of Nuclear Materials

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Section: Discussioncontrasting

confidence: 79%

“…The intensity ratio taken from the damaged layers only, R 0 , provides a more accurate assessment of ion effects and can be readily calculated from Eq. (2), which is a corrected version of that reported in the literature [19,24]:…”

Section: Discussionmentioning

confidence: 97%

Ion-induced damage in graphite: A Raman study

Theodosiou

Carley

Taylor

2010

Journal of Nuclear Materials

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“…(1) reduces to a single Lorentzian centered at ω(0). This Raman line-shape interpretation, which is known in literature as "phonon confinement model" or "spatial correlation model," has been successfully applied to explain the Raman scattering from several ion-bombarded crystals, for example, graphene [16], graphite [25], and GaAs [26], as well as to estimate the domain size of microcrystalline silicon [27,28] and the width of silicon nanowires [29].…”

Section: Resultsmentioning

confidence: 99%

“…It has indeed been reported that both Pos(E ) and Pos(A 1 ) decrease (increase) with tensile (compressive) in-plane strain [11,24], which is once again contrary to our experimental observations. However, although doping and strain will have an effect on the Raman spectra, the observed disorder-related evolution of the first-order peaks can instead be explained using a "phonon confinement model," as reported for ion-bombarded graphene [16] and other disordered crystals [25][26][27].…”

Section: Methodsmentioning

confidence: 98%

Effect of disorder on Raman scattering of single-layerMoS2

et al. 2015

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We determine the effect of defects induced by ion bombardment on the Raman spectrum of single-layer molybdenum disulfide. The evolution of both the linewidths and frequency shifts of the first-order Raman bands with the density of defects is explained with a phonon confinement model, using density functional theory to calculate the phonon dispersion curves. We identify several defect-induced Raman scattering peaks arising from zone-edge phonon modes. Among these, the most prominent is the LA(M) peak at ∼227 cm −1 and its intensity, relative to the one of first-order Raman bands, is found to be proportional to the density of defects. These results provide a practical route to quantify defects in single-layer MoS 2 using Raman spectroscopy and highlight an analogy between the LA(M) peak in MoS 2 and the D peak in graphene.

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“…Since the D-band is absent in highly-ordered-pyrolyticgraphite, it has been common to associate the intensity of the D-band to the degree of disorder relative to the perfect graphitic structure (Asari et al 1994;Xing et al 2013). On that basis, the comparatively lower intensity of D-band and the lower half-width of the G-band in the post-HTT Mascoma carbon would suggest the presence of relatively higher degree of graphitic-like order in this carbon.…”

Section: Raman Spectroscopymentioning

confidence: 98%

Hydrothermal conversion of commercial lignin to carbonaceous materials

Seehra

Pyapalli

Poston

et al. 2015

J Indian Acad Wood Sci

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Commercial lignin is a by-product of pulping and the emerging bio-refinery industries. Herein, we report the hydrothermal treatment (HTT) or conversion (HTC) of three commercial types of lignin to carbonaceous materials. HTC of lignin was carried out in an autoclave in the presence of water at temperature and pressure of approximately 300°C and 1000 psi respectively. Morphological, physical and chemical properties of parent lignin and their hydrothermally derived carbonaceous materials were characterized by X-ray diffraction, scanning electron microscopy (SEM), thermogravimetric analysis, elemental composition, Fourier-transform infrared and Raman spectroscopies (FTIR). This study demonstrated differences in the morphology of carbons from the three lignin types. SEM analysis showed that hydrothermally derived carbonaceous materials from Mascoma lignin contained spherical particles with diameters ranging from 50 to 250 nm whereas that from ammonium and sodium lignosulfonate lignins contained similar particles but were highly agglomerated. The better characteristics of the post-HTT Mascoma carbon vis-à-vis post-HTT ammonium and sodium carbons are also evident in the results obtained from X-ray diffraction, thermo-gravimetric analysis, and FTIR spectroscopy. Thus, carbonaceous materials can be obtained from low-value commercial lignins via HTT and their properties are influenced by the type of lignin.

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Lattice disordering in graphite under rare-gas ion irradiation studied by Raman spectroscopy

Cited by 36 publications

References 18 publications

Ion-induced damage in graphite: A Raman study

Ion-induced damage in graphite: A Raman study

Effect of disorder on Raman scattering of single-layerMoS2

Hydrothermal conversion of commercial lignin to carbonaceous materials

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