Nanoscale profiling of multilayer graphene films on silicon carbide by a focused ion beam

Kolomiytsev, A. S.; Jityaev, I. L.; Svetlichnyi, A. M.; Fedotov, A. A.; Ageev, O A

doi:10.1016/j.diamond.2020.107969

Cited by 4 publications

(2 citation statements)

References 64 publications

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“…A novel correlation was observed between the 2D mode line width and the inverse I D /I G ratio, which allowed the determination of strain type and layer number [ 74 ]. Kolomiytsev et al employ Raman spectroscopy to investigate the layer numbers of multilayer graphene, and found that there were 10 layers per multilayer graphene flake [ 75 ]. Yitzhak et al studied fluctuations in Raman spectra for FLG and single-layer graphene and analyzed the positions and intensities of the Raman peaks for different layer numbers [ 76 ].…”

Section: Techniques Used To Determine Numbers Of Graphene Layersmentioning

confidence: 99%

Estimation of Number of Graphene Layers Using Different Methods: A Focused Review

et al. 2021

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Graphene, a two-dimensional nanosheet, is composed of carbon species (sp2 hybridized carbon atoms) and is the center of attention for researchers due to its extraordinary physicochemical (e.g., optical transparency, electrical, thermal conductivity, and mechanical) properties. Graphene can be synthesized using top-down or bottom-up approaches and is used in the electronics and medical (e.g., drug delivery, tissue engineering, biosensors) fields as well as in photovoltaic systems. However, the mass production of graphene and the means of transferring monolayer graphene for commercial purposes are still under investigation. When graphene layers are stacked as flakes, they have substantial impacts on the properties of graphene-based materials, and the layering of graphene obtained using different approaches varies. The determination of number of graphene layers is very important since the properties exhibited by monolayer graphene decrease as the number of graphene layer per flake increases to 5 as few-layer graphene, 10 as multilayer graphene, and more than 10 layers, when it behaves like bulk graphite. Thus, this review summarizes graphene developments and production. In addition, the efficacies of determining the number of graphene layers using various characterization methods (e.g., transmission electron microscopy (TEM), atomic force microscopy (AFM), scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectra and mapping, and spin hall effect-based methods) are compared. Among these methods, TEM and Raman spectra were found to be most promising to determine number of graphene layers and their stacking order.

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Section: Techniques Used To Determine Numbers Of Graphene Layersmentioning

confidence: 99%

Estimation of Number of Graphene Layers Using Different Methods: A Focused Review

et al. 2021

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“…The G-band Raman peak is related to the sp 2 vibration of carbon that is neatly arranged in the graphene structure. The G-band peak intensity can be used as a reference to compare with the 2Dband peak [26,27]. By comparing the 2D-band peak intensity with the G-band peak intensity (I2D/IG), an indication of the number of graphene layers formed will be obtained.…”

Section: Raman Spectroscopic Characterizationmentioning

confidence: 99%

Enhancing Growth of Multi-Layer Graphene Synthesis on Glass Substrate Though Ni Catalyst Annealing Using Hot Wire in Plasma Very High-Frequency PECVD Method

Nuayi,

Noor,

Sustini

et al. 2024

J. Phys.: Conf. Ser.

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This study synthesized multi-layer graphene on a glass substrate using the high-frequency plasma-enhanced vapor deposition method with a hot wire in plasma. In the growth process, plasma was generated from methane gas (CH4) using an RF power generator at 70 MHz frequency and nickel (Ni) as the catalyst, which is deposited and annealed beforehand. This study aims as a preliminary to obtain optimum parameters for MLG growth using the HW IP-VHF-PECVD method. Raman spectroscopy, utilizing a 532 nm laser and an 1800 g/mm grating, detected distinctive D-band, G-band, and 2D-band peaks at wave numbers of 1335.31, 1607.74, and 2660.99 cm−1, respectively, in unannealed catalyst samples. Raman analysis, incorporating the I2D/IG ratio, revealed the presence of multi-layer graphene exhibiting diverse ratios (0.07 – 0.22) and crystal sizes (15.62 – 20.70 nm). SEM analysis demonstrated enhanced homogeneity in grain size and uniformity in thickness following Ni catalyst annealing. EDS confirmed the successful growth of graphene with carbon identified as the primary element. The annealing process at 400 °C for two hours resulted in graphene with a higher mass percentage and a more significant percentage of carbon atoms. These findings underscore the potential of the HW IP-VHF-PECVD method for producing multi-layer graphene, particularly in the context of solar cell applications, with further optimization of parameters.

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Recent Progress of Gr/Si Schottky Photodetectors

Shao

Qin

et al. 2022

Electron. Mater. Lett.

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Nanoscale profiling of multilayer graphene films on silicon carbide by a focused ion beam

Cited by 4 publications

References 64 publications

Estimation of Number of Graphene Layers Using Different Methods: A Focused Review

Estimation of Number of Graphene Layers Using Different Methods: A Focused Review

Enhancing Growth of Multi-Layer Graphene Synthesis on Glass Substrate Though Ni Catalyst Annealing Using Hot Wire in Plasma Very High-Frequency PECVD Method

Recent Progress of Gr/Si Schottky Photodetectors

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