Characterization of sp2/sp3 hybridization ratios of hydrogenated amorphous carbon films deposited in C2H2 inductively coupled plasmas

Li, Jie; Kim, Sun Jung; Han, Seung-Hun; Chae, Heeyeop

doi:10.1016/j.surfcoat.2021.127514

Cited by 18 publications

(9 citation statements)

References 46 publications

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“…2b shows a peak at 284.6 eV attributed to C 1s, which could be separated into two symmetric peaks at 284.5 and 285.2 eV, corresponding to sp 2 hybridized C and sp 3 hybridized C, respectively. 34 Fig. 2c conspicuously displays the core-level XPS spectrum of N 1s, and the three peaks were associated with the electronic states of the three kinds of nitrogen: pyridinic N (398.5 eV), pyridonic-N or pyrrolic-N (399.7 eV), and graphitic-N (401.03 eV).…”

Section: Resultsmentioning

confidence: 99%

Ultra-durable and flexible fibrous mild quasi-solid-state Ag–Zn batteries with Na₂SO₄electrolyte additive

Wang

Sun

et al. 2022

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Ultra-durable and flexible fibrous mild quasi-solid-state Ag–Zn batteries with Na₂SO₄electrolyte additive

Wang

Sun

et al. 2022

J. Mater. Chem. A

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“…Concerning the amorphous carbon (a-C) present in the nanocomposites, it is important to estimate its density and fraction of sp 3 bonded carbon atoms, as sound velocity and thermal conductivity strongly depend on these quantities. [43][44][45] In order to estimate the sp 3 fraction in GTC9, we have measured its Raman spectrum in the frequency region of the amorphous carbon stretching modes. The sp 3 fraction can be estimated from the intensity ratio between the two Raman peaks (see Supporting Information), [44] and the width of the G peak is related to carbon density.…”

Section: Samplesmentioning

confidence: 99%

Glass‐Like Phonon Dynamics and Thermal Transport in a GeTe Nano‐Composite at Low Temperature

Cravero,

Tlili,

Paterson

et al. 2024

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In this work, the experimental evidence of glass‐like phonon dynamics and thermal conductivity in a nanocomposite made of GeTe and amorphous carbon is reported, which is of interest for microelectronics, and specifically phase change memories. It is shown that, the total thermal conductivity is reduced by a factor of three at room temperature with respect to pure GeTe, due to the reduction of both electronic and phononic contributions. This latter, similarly to glasses, is small and weakly increasing with temperature between 100 and 300 K, indicating a mostly diffusive thermal transport and reaching a value of 0.86(7) Wm−1K−1 at room temperature. A thorough investigation of the nanocomposite's phonon dynamics reveals the appearance of an excess intensity in the low energy vibrational density of states, reminiscent of the Boson peak in glasses. These features can be understood in terms of an enhanced phonon scattering at the interfaces, due to the presence of elastic heterogeneities, at wavelengths in the 2–20 nm range. The findings confirm recent simulation results on crystalline/amorphous nanocomposites and open new perspectives in phonon and thermal engineering through the direct manipulation of elastic heterogeneities.

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“…Увеличение I D /I G коррелирует с увеличением I polyenic C=C /I G (то есть с ростом доли полиеновой фазы) и I C(sp 3 )−H /I G (то есть с ростом водородной пассивации алмазов). В то же время известно, что увеличение гидрогенизации аморфного углерода уменьшает I D /I G [35,57], вследствие чего изменение I D /I G не может быть описано при помощи встраивания водорода в аморфную фазу покрытий. По-видимому, в исследуемом случае на разупорядоченность аморфной субструктуры оказывает влияние рост доли полиеновой фазы, который приводит к увеличению площади границ раздела между аморфной и полимерной компонентами, что проявляется в спектрах как разупорядочение материала.…”

Section: обсуждение структурных особенностей покрытийunclassified

Полученные плазменно-химическим осаждением a-C : ND покрытия: взаимосвязь эмиссионных свойств и фазового состава

Завидовский¹,

Стрелецкий²,

Татаринцев³

et al. 2023

Физика Твердого Тела

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The coatings comprised of the nanodiamond-based and amorphous-carbon-based phases (a-C:ND coatings) are investigated. The a-C:ND coatings were synthesized by chemical vapor deposition in the arc discharge plasma (by plasma chemical deposition) at various concentrations of Ar/H2/CH4. Raman spectroscopy showed that, apart from the diamond substructure, studied coatings contain amorphous-carbon-based and polyene-based phases, while diamond phase is passivated by hydrogen to different degrees. The interplay between the deposition parameters and materials' structure is analysed. It was shown that the ordering of the amorphous substructure and the formation of the phase boundaries affect the electron transport and secondary electron emission properties. The subject of the investigation of the true secondary electron spectra for the analysis of the nanostructured carbon materials is analysed. It was shown that the change of the polyene fraction in the structure of the samples leads to the variation of the ratio of field emission and thermionic emission. The influence of the structure and phase composition of the samples on their electron emission properties is investigated. In particular, their effect on the turn on-field, which value varied in the 9-18 V/μm range for the studied samples, is analysed.

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Characterization of sp2/sp3 hybridization ratios of hydrogenated amorphous carbon films deposited in C2H2 inductively coupled plasmas

Cited by 18 publications

References 46 publications

Ultra-durable and flexible fibrous mild quasi-solid-state Ag–Zn batteries with Na₂SO₄electrolyte additive

Ultra-durable and flexible fibrous mild quasi-solid-state Ag–Zn batteries with Na₂SO₄electrolyte additive

Glass‐Like Phonon Dynamics and Thermal Transport in a GeTe Nano‐Composite at Low Temperature

Полученные плазменно-химическим осаждением a-C : ND покрытия: взаимосвязь эмиссионных свойств и фазового состава

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Characterization of sp2/sp3 hybridization ratios of hydrogenated amorphous carbon films deposited in C2H2 inductively coupled plasmas

Cited by 18 publications

References 46 publications

Ultra-durable and flexible fibrous mild quasi-solid-state Ag–Zn batteries with Na2SO4electrolyte additive

Ultra-durable and flexible fibrous mild quasi-solid-state Ag–Zn batteries with Na2SO4electrolyte additive

Glass‐Like Phonon Dynamics and Thermal Transport in a GeTe Nano‐Composite at Low Temperature

Полученные плазменно-химическим осаждением a-C : ND покрытия: взаимосвязь эмиссионных свойств и фазового состава

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Ultra-durable and flexible fibrous mild quasi-solid-state Ag–Zn batteries with Na₂SO₄electrolyte additive

Ultra-durable and flexible fibrous mild quasi-solid-state Ag–Zn batteries with Na₂SO₄electrolyte additive