Raman characterization and UV optical absorption studies of surface plasmon resonance in multishell nanographite

Osipov, V. Yu.; Баранов, А. В.; Ермаков, В. А.; Makarova, T. L.; Chungong, L. F.; Shames, Alexander I.; Takai, Kazuyuki; Enoki, Toshiaki; Kaburagi, Yutaka; Endo, Morinobu; Vul, A. Ya.

doi:10.1016/j.diamond.2010.12.006

Cited by 36 publications

(33 citation statements)

References 38 publications

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“…This is in line with previous observations for multi-crystalline graphite [30], nanographites [40,41], defective graphenes [24-26, 33, 34], soots [39], carbon blacks [31] and polymer derived carbons [31]. Fig.…”

Section: D' Bandsupporting

confidence: 93%

“…The use of multi-wavelength laser sources can also help improve deconvolution reliability as the fitted results can be checked against the expected excitation energy dispersive behaviour [23,31,32,[40][41][42][43].…”

Section: Figmentioning

confidence: 99%

“…Of interest here are those that have been experimentally observed for disordered carbons and are thought to be related to defects, namely the D' [22,[30][31][32][33][34], A [35][36][37][38][39][40][41] and TPA [40][41][42] bands. Similar to the D band, the D' band is caused by defect-induced breaking of translational symmetry [32].…”

Section: Introductionmentioning

confidence: 99%

“…non-crystalline sp 3 -dominated carbon) [35][36][37], whilst more recent theoretical and experimental studies [38][39][40][41] suggested it may come from non-hexagonal ring defects in the sp 2 system. The TPA band has been linked to both sp 2 -based transpolyacetylene-like chains (see Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The TPA band has been linked to both sp 2 -based transpolyacetylene-like chains (see Fig. 1) at layer edges [42] and, more recently, to zigzag edges [40,41], although this assignment is questionable given the contrast between the abundance of zig-zag edges in these materials and the relatively low intensity of TPA bands that appear in their Raman spectra.…”

Section: Introductionmentioning

confidence: 99%

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Raman spectroscopy study of the transformation of the carbonaceous skeleton of a polymer-based nanoporous carbon along the thermal annealing pathway

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Section: D' Bandsupporting

confidence: 93%

Section: Figmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Super‐Elasticity and Ultralow Friction of Hydrogenated Fullerene‐Like Carbon Films: Associated with the Size of Graphene Sheets

Cao

Zhao

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et al. 2018

Adv Materials Inter

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such as high-hardness/strength, excellent elasticity, and high compressibility. [1][2][3][4] Carbon nitride films, [5] pure carbon films, [6] and hydrogenated carbon films [7] containing these fullerene-like structures have been proved to possess excellent elastic recovery rate (85%, 80%, and 85%, respectively) and high hardness values (60, 53, and 19 GPa, respectively). In particular, hydrogenated fullerene-like carbon (FLC:H) films can also exhibit ultralow friction behaviors, which are desirable to minimize mechanical dissipation. These properties are essential for the application of these materials as protective coatings to engineering components. But the exact relationship between these properties and the fullerene-like structures is still unclear. The nanostructure of graphene sheets and the number of cross-linking sites between them may be two main structural factors determining these properties. Exploring the structureproperties relationship is crucial to effectively tailor these properties for potentially more applications. Some relevant studies have demonstrated that fullerene-like spheroids (FLS) encased in disordered graphene layers [4] and aligned carbon nanotube films [8] can display a lot of mechanical characteristics similar to those of architectured materials. Controlling the size, concentration, and connectivity of FLS or manipulating buckled morphologies of nanotube can tailor their mechanical properties. Thus, it is expected that FLC films may yield exceptional and tunable mechanical properties by controlling the nanostructure of graphene sheets. However, there are very few experimental reports on these issues, because designing and controlling the nanostructure of graphene sheets in FLC films remains a technical challenge.Recently a number of methods, such as ion beam-assisted deposition, molecular beam epitaxy, and plasma enhanced chemical vapor deposition (PECVD) have been developed for manufacturing high quality graphene-like materials. [9][10][11] It has been demonstrated that low-energy argon ions bombardment in these deposition systems is beneficial for the formation of graphene network. [12][13][14] Molecular dynamics simulations experiments also showed that low-energy (10-25 eV) argon ions bombardment could result in an increase in the number of graphitic rings and further enhance the graphene network growth. [13,15] The formation of curved graphene sheets (CGS) in magnetron-sputtered CN x films was mainly attributed to Hydrogenated fullerene-like carbon (FLC:H) films would be a widely used material with a unique combination of properties including high-hardness/ strength, excellent elasticity, and ultralow friction. The nanostructure of graphene sheets and the number of cross-linking sites between them may be two main structural factors determining these properties. Exploring the structure-properties relationship is crucial to effectively tailor these properties for potentially more applications. In this study it is demonstrated that FLC:H films can yield exceptional and tunable mec...

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Nickel Nanoparticles Encapsulated in Nitrogen‐Doped Carbon Nanofibers as Excellent Bifunctional Catalyst for Hydrogen and Oxygen Evolution Processes

et al. 2022

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The potential of nitrogen-doped carbon nanofibers with encapsulated Ni nanoparticles as a bifunctional catalyst in H 2 and O 2 evolution reactions (HER and OER, respectively) was studied. The proposed heterostructure is fabricated via a facile chemical vapor deposition on Ni supported on graphitic carbon nitride (GCN) as a precursor. HER was an effect of photocatalytic water splitting and catalytic dehydrogenation of lactic acid used as sacrificial electron donor. However, photocatalysis played the dominant role in the acceleration of the reaction rate which was 17 times and 330 times higher in respect to the sample prior the CVD and to pristine GCN, respectively. The catalyst exhibited boosted electrocatalytic activity in OER and outstanding stability in respect to RuO 2 in alkaline medium. The overpotentials calculated from linear sweep voltammetry at 10 mA cm À 2 is ~383 mV for the fabricated electrocatalyst in respect to 490 mV for the RuO 2 and Tafel slope is calculated to be 106 mV dec À 1 in comparison to 136 mV dec À 1 for the reference which is above the state-of the-art bifunctional catalysts reported to date. The results reveal that the catalytic processes were boosted due to several key effects such as enhanced visible light absorption, better charge carriers transfer and separation, increased free charge carrier concentration and higher reducing ability of electrons.

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Raman characterization and UV optical absorption studies of surface plasmon resonance in multishell nanographite

Cited by 36 publications

References 38 publications

Raman spectroscopy study of the transformation of the carbonaceous skeleton of a polymer-based nanoporous carbon along the thermal annealing pathway

Raman spectroscopy study of the transformation of the carbonaceous skeleton of a polymer-based nanoporous carbon along the thermal annealing pathway

Super‐Elasticity and Ultralow Friction of Hydrogenated Fullerene‐Like Carbon Films: Associated with the Size of Graphene Sheets

Nickel Nanoparticles Encapsulated in Nitrogen‐Doped Carbon Nanofibers as Excellent Bifunctional Catalyst for Hydrogen and Oxygen Evolution Processes

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