Synthesis of few layer single crystal graphene grains on platinum by chemical vapour deposition

Karamat, Shumaila; Sonusen, Selda; Çelik, Ümit; Uysallı, Yiğit; Ozgonul, Ekin; Oral, Ahmet

doi:10.1016/j.pnsc.2015.07.006

Cited by 34 publications

(12 citation statements)

References 48 publications

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“…On this basis, the results of the rGO sheets showed that the rGO produced with the CO 2 laser presents a lower number of layers (higher I 2D /I G ratio) than the one induced with the UV laser, which might be related to its lower thickness (~12 µm, in comparison with 18 µm, according to profilometry results) due to the higher irradiation power, as demonstrated in other works [48]. In addition, the lower FWHM 2D also indicates that these layers have a better crystallographic structure [49]. The better recovery of the crystallographic structure of the rGO obtained with the CO 2 laser is an indication of a more effective reduction process, which explains its smaller sheet resistance, in spite of having lower thickness.…”

Section: Resultsmentioning

confidence: 59%

Comparison of Laser-Synthetized Nanographene-Based Electrodes for Flexible Supercapacitors

et al. 2020

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In this paper, we present a comparative study of a cost-effective method for the mass fabrication of electrodes to be used in thin-film flexible supercapacitors. This technique is based on the laser-synthesis of graphene-based nanomaterials, specifically, laser-induced graphene and reduced graphene oxide. The synthesis of these materials was performed using two different lasers: a CO2 laser with an infrared wavelength of λ = 10.6 µm and a UV laser (λ = 405 nm). After the optimization of the parameters of both lasers for this purpose, the performance of these materials as bare electrodes for flexible supercapacitors was studied in a comparative way. The experiments showed that the electrodes synthetized with the low-cost UV laser compete well in terms of specific capacitance with those obtained with the CO2 laser, while the best performance is provided by the rGO electrodes fabricated with the CO2 laser. It has also been demonstrated that the degree of reduction achieved with the UV laser for the rGO patterns was not enough to provide a good interaction electrode-electrolyte. Finally, we proved that the specific capacitance achieved with the presented supercapacitors can be improved by modifying the in-planar structure, without compromising their performance, which, together with their compatibility with doping-techniques and surface treatments processes, shows the potential of this technology for the fabrication of future high-performance and inexpensive flexible supercapacitors.

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Section: Resultsmentioning

confidence: 59%

Comparison of Laser-Synthetized Nanographene-Based Electrodes for Flexible Supercapacitors

et al. 2020

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“…51,52 With an increase in the number of layers, the expectation would be to observe further widening of the 2D peak (increased FWHM) due to a more complex splitting of the electronic bands. 50,53 The obtained data reveals that the graphene dispersions; N2, N3, E1 and E2; consist of multi-layer graphene structures. The shape of the 2D peak of dispersion N1 suggest it consists of more graphitic, i.e.…”

Section: Materials Advancesmentioning

confidence: 89%

Feasibility of graphene–polymer composite membranes for forward osmosis applications

et al. 2021

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“…To date, graphene has been generated by several synthetic routes, including exfoliation of graphite through mechanical, chemical or electrochemical processes, growth of graphene nanosheets on substrates (e.g. chemical vapor deposition, SiC decomposition) and organic synthesis [13][14][15]. The pristine graphene has an inert surface with few active oxygen-containing groups.…”

Section: Introductionmentioning

confidence: 99%

Direct growth of SnO2 nanocrystallites on electrochemically exfoliated graphene for lithium storage

Yue

Lin

et al. 2019

Journal of Energy Storage

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As a new generation of high quality graphene, electrochemically exfoliated graphene is an ideal platform for constructing integrated high-performance nanocomposites as advanced electrode materials for energy storage and conversion devices. To take on a challenge of direct growth of nanoparticles on electrochemically exfoliated graphene with limited oxygen-containing functional groups and its hydrophobic nature, a systematic study is carried out on growth of SnO2 nanocrystallites on the surface of electrochemically exfoliated graphene. The results indicate that these nanocrystals can efficiently grow on the functional group-free surface of electrochemically exfoliated graphene, if the precursor molecules can polymerize into larger molecules and aggregate on electrochemically exfoliated graphene followed by decomposition and phase transformation into the final metal oxide nanocrystallites. Some key factors affecting this non-classical crystal growth are investigated. Addition of a small amount of water in a polar aprotic solvent to stimulate polymerization of the precursor molecules and a solvothermal treatment to facilitate decomposition of the disordered 2 aggregates of the polymerized precursors are crucial to the growth of nanocrystals on electrochemically exfoliated graphene. The improved electrical conductivity and structural stability of the hybrids may promote the performance of the materials in various applications, such as exceptional lithium storage capability.

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Synthesis of few layer single crystal graphene grains on platinum by chemical vapour deposition

Cited by 34 publications

References 48 publications

Comparison of Laser-Synthetized Nanographene-Based Electrodes for Flexible Supercapacitors

Comparison of Laser-Synthetized Nanographene-Based Electrodes for Flexible Supercapacitors

Feasibility of graphene–polymer composite membranes for forward osmosis applications

Direct growth of SnO2 nanocrystallites on electrochemically exfoliated graphene for lithium storage

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