Layer number identification of CVD-grown multilayer graphene using Si peak analysis

No, You-Shin; Choi, Hong Kyw; Kim, Jin-Soo; Kim, Hakseong; Yu, Yeonsil; Choi, Choon-Gi; Choi, Jin Sik

doi:10.1038/s41598-017-19084-1

Cited by 65 publications

(31 citation statements)

References 28 publications

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“…R 2 value was close to 1, resembling a nongraphitic 2D peak without a shoulder . The observed tall G peak with a small nongraphitic 2D peak may represent rotation in multilayer CVD graphene synthesized on the nickel catalyst, as reported earlier. ,,, …”

Section: Resultssupporting

confidence: 74%

CVD Synthesis of 3D-Shaped 3D Graphene Using a 3D-Printed Nickel–PLGA Catalyst Precursor

Kondapalli

Khosravifar

et al. 2021

ACS Omega

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Earlier, various attempts to develop graphene structures using chemical and nonchemical routes were reported. Being efficient, scalable, and repeatable, 3D printing of graphene-based polymer inks and aerogels seems attractive; however, the produced structures highly rely on a binder or an ice support to stay intact. The presence of a binder or graphene oxide hinders the translation of the excellent graphene properties to the 3D structure. In this communication, we report our efforts to synthesize a 3D-shaped 3D graphene (3D 2 G) with good quality, desirable shape, and structure control by combining 3D printing with the atmospheric pressure chemical vapor deposition (CVD) process. Direct ink writing has been used in this work as a 3D-printing technique to print nickel powder−PLGA slurry into various shapes. The latter has been employed as a catalyst for graphene growth via CVD. Porous 3D 2 G with high purity was obtained after etching out the nickel substrate. The conducted micro CT and 2D Raman study of pristine 3D 2 G revealed important features of this new material. The interconnected porous nature of the obtained 3D 2 G combined with its good electrical conductivity (about 17 S/cm) and promising electrochemical properties invites applications for energy storage electrodes, where fast electron transfer and intimate contact with the active material and with the electrolyte are critically important. By changing the printing design, one can manipulate the electrical, electrochemical, and mechanical properties, including the structural porosity, without any requirement for additional doping or chemical postprocessing. The obtained binderfree 3D 2 G showed a very good thermal stability, tested by thermo-gravimetric analysis in air up to 500 °C. This work brings together two advanced manufacturing approaches, CVD and 3D printing, thus enabling the synthesis of high-quality, binder-free 3D 2 G structures with a tailored design that appeared to be suitable for multiple applications.

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Section: Resultssupporting

confidence: 74%

CVD Synthesis of 3D-Shaped 3D Graphene Using a 3D-Printed Nickel–PLGA Catalyst Precursor

Kondapalli

Khosravifar

et al. 2021

ACS Omega

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“…All of this makes it infeasible for the 2-D materials' semiconductor device applications. Our method of directly characterizing 2-D MoSe 2 and WSe 2 on the SiO 2 /Si substrate con rms this previously reported method's [34] feasibility to a broader range of 2-D materials. It has the advantages of keeping the sample's physical properties closest to pristine, providing quantitative values for precise layer number characterization, and nondestruction, thus providing direct industrial applications.…”

Section: Introductionsupporting

confidence: 84%

Characterization of Layer Number of Two-Dimensional Transition Metal Diselenide Semiconducting Devices Using Si-Peak Analysis

Zhang

2019

Advances in Materials Science and Engineering

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Atomically thin materials such as semiconducting transition metal diselenide materials, like molybdenum diselenide (MoSe2) and tungsten diselenide (WSe2), have received intensive interests in recent years due to their unique electronic structure, bandgap engineering, ambipolar behavior, and optical properties and have motivated investigations for the next-generation semiconducting electronic devices. In this work, we show a nondestructive method of characterizing the layer number of two-dimensional (2-D) MoSe2 and WSe2 including single- and few-layer materials by Raman spectroscopy. The related photoluminescence properties are also studied as a reference. Although Raman spectroscopy is a powerful tool for determining the layer number of 2-D materials such as graphene and molybdenum disulfide (MoS2), there have been difficulties in precisely characterizing the layer number for MoSe2 and WSe2 by Raman spectroscopy due to the uncertain shifts during the Raman measurement process and the lack of multiple separated Raman peaks in MoSe2 and WSe2 for referencing. We then compared the normalized Si peak with MoSe2 and WSe2 and successfully identified the layer number of MoSe2 and WSe2. Similar to graphene and MoS2, the sample layer number is found to modify their optical properties up to 4 layers.

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“…Raman spectroscopy was performed to verify graphitic quality of SLG grown on Cu and transferred onto Au (Figure 2c). Graphene grown on Cu presents sharp first-order bond stretching G band centered at~1589 cm −1 and the two-phonon 2D band centered at~2683 cm −1 , with a 2D/G intensity ratio of 2.47, which is expected for single layer graphene [67,68]. After the transfer process, graphene on Au show a decrease in the 2D/G intensity ratio (1.92), which is probably connected to the annealing process during transference onto Au [69].…”

Section: Characterization Of Graphene-coated and Uncoated Au Samplesmentioning

confidence: 89%

Graphene Coating as an Effective Barrier to Prevent Bacteria-Mediated Dissolution of Gold

Parra

Aristizábal

Arce

et al. 2021

Metals

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The interaction of biofilms with metallic surfaces produces two biologically induced degradation processes of materials: microbial induced corrosion and bioleaching. Both phenomena affect most metallic materials, but in the case of noble metals such as gold, which is inert to corrosion, metallophilic bacteria can cause its direct or in direct dissolution. When this process is controlled, it can be used for hydrometallurgical applications, such as the recovery of precious metals from electronic waste. However, the presence of unwanted bioleaching-producing bacteria can be detrimental to metallic materials in specific environments. In this work, we propose the use of single-layer graphene as a protective coating to reduce Au bioleaching by Cupriavidus metallidurans, a strain adapted to metal contaminated environments and capable of dissolving Au. By means of Scanning Tunneling Microscopy, we demonstrate that graphene coatings are an effective barrier to prevent the complex interactions responsible for Au dissolution. This behavior can be understood in terms of graphene pore size, which creates an impermeable barrier that prevents the pass of Au-complexing ligands produced by C.metallidurans through graphene coating. In addition, changes in surface energy and electrostatic interaction are presumably reducing bacterial adhesion to graphene-coated Au surfaces. Our findings provide a novel approach to reduce the deterioration of metallic materials in devices in environments where biofilms have been found to cause unwanted bioleaching.

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Layer number identification of CVD-grown multilayer graphene using Si peak analysis

Cited by 65 publications

References 28 publications

CVD Synthesis of 3D-Shaped 3D Graphene Using a 3D-Printed Nickel–PLGA Catalyst Precursor

CVD Synthesis of 3D-Shaped 3D Graphene Using a 3D-Printed Nickel–PLGA Catalyst Precursor

Characterization of Layer Number of Two-Dimensional Transition Metal Diselenide Semiconducting Devices Using Si-Peak Analysis

Graphene Coating as an Effective Barrier to Prevent Bacteria-Mediated Dissolution of Gold

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