Catalyst-Free Plasma Enhanced Growth of Graphene from Sustainable Sources

Jacob, Mohan V.; Rawat, Rajdeep Singh; Ouyang, Bo; Bazaka, Kateryna; Kumar, D. Sakthi; Taguchi, Dai; Iwamoto, Mitsumasa; Neupane, Ram; Varghese, Oomman K.

doi:10.1021/acs.nanolett.5b01363

Cited by 128 publications

(98 citation statements)

References 46 publications

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“…20 The decreased I 2D /I G ratio (0.28) in VGNH-45 suggests its multilayer nature and a reduced lateral coherence length because of vertical termination. 23,24,25 The large I D /I G ratio in both samples indicates the presence of defects within the graphene sheets, which are indeed beneficial for electrocatalytic reactions.…”

Section: Resultsmentioning

confidence: 96%

Superaerophobic graphene nano-hills for direct hydrazine fuel cells

et al. 2017

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Hydrazine fuel-cell technology holds great promise for clean energy, not only because of the greater energy density of hydrazine compared to hydrogen but also due to its safer handling owing to its liquid state. However, current technologies involve the use of precious metals (such as platinum) for hydrazine oxidation, which hinders the further application of hydrazine fuel-cell technologies. In addition, little attention has been devoted to the management of gas, which tends to become stuck on the surface of the electrode, producing overall poor electrode efficiencies. In this study, we utilized a nano-hill morphology of vertical graphene, which efficiently resolves the issue of the accumulation of gas bubbles on the electrode surface by providing a nano-rough-edged surface that acts as a superaerophobic electrode. The growth of the vertical graphene nano-hills was achieved and optimized by a scalable plasma-enhanced chemical vapor deposition method. The resulting metal-free graphene-based electrode showed the lowest onset potential (−0.42 V vs saturated calomel electrode) and the highest current density of all the carbon-based materials reported previously for hydrazine oxidation.

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Section: Resultsmentioning

confidence: 96%

Superaerophobic graphene nano-hills for direct hydrazine fuel cells

et al. 2017

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“…Similar to plasma-enhanced CVD which was reported by various groups to have improved the resulting graphene (Chan et al 2013;Jacob et al 2015), flame is another form of plasma that is expected to exert a similar positive effect on the graphene synthesis. In fact, researchers have reported on the formation of few-layer graphene through open-flame deposition (Li et al 2011;Liu et al 2016;Memon et al 2011).…”

Section: Introductionmentioning

confidence: 73%

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2017

JSM

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“…Figure 2 shows the origin of the mismatch between graphene and the underlying metal crystal structure. The difference in the crystallographic orientation also allows, to some extent, a different growth mechanism, as in the case of Cu (111) where the growth of graphene is surface diffusion limited, whereas for Cu (100), monomer attachment to graphene is restricted [37]. The lattice mismatch can be calculated using the following equation (Eq.…”

Section: Crystallinity and Morphology Of The Substrates Crystallinitymentioning

confidence: 99%

A critical review on the contributions of chemical and physical factors toward the nucleation and growth of large-area graphene

et al. 2018

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Since the first isolation of graphene over a decade ago, research into graphene has exponentially increased due to its excellent electrical, optical, mechanical and chemical properties. Graphene has been shown to enhance the performance of various electronic devices. In addition, graphene can be simply produced through chemical vapor deposition (CVD). Although the synthesis of graphene has been widely researched, especially for CVD growth method, the lack of understanding on various synthetic parameters still limits the fabrication of large-area and defect-free graphene films. This report critically reviews various parameters affecting the quality of CVD-grown graphene to understand the relationship between these parameters and the choice of metal substrates and to provide a point of reference for future studies of large-area, CVD-grown graphene.

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Catalyst-Free Plasma Enhanced Growth of Graphene from Sustainable Sources

Cited by 128 publications

References 46 publications

Superaerophobic graphene nano-hills for direct hydrazine fuel cells

Superaerophobic graphene nano-hills for direct hydrazine fuel cells

Untitled

A critical review on the contributions of chemical and physical factors toward the nucleation and growth of large-area graphene

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