Direct CVD growth of graphene on three-dimensionally-shaped dielectric substrates

Shin, Jae Hyeok; Kim, Su Han; Kwon, Sun Sang; Park, Won Il

doi:10.1016/j.carbon.2017.12.097

Cited by 30 publications

(10 citation statements)

References 24 publications

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“…For instance, a Cu foil was placed between two 3D hemisphere-patterned sapphire substrates to facilitate the deposition of uniform and highquality 2−3-layer graphene on the 3D sapphire. 826 An intimate contact of the Cu foil and the sapphire substrates was the key to a conformal coating of few-layer graphene. Without the assistance of the Cu foil, only amorphous carbon was resulted.…”

Section: Chemical Vapor Deposition (Cvd)mentioning

confidence: 99%

3D Graphene Materials: From Understanding to Design and Synthesis Control

2020

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Carbon materials, with their diverse allotropes, have played significant roles in our daily life and the development of material science. Following 0D C60 and 1D carbon nanotube, 2D graphene materials, with their distinctively fascinating properties, have been receiving tremendous attention since 2004. To fulfill the efficient utilization of 2D graphene sheets in applications such as energy storage and conversion, electrochemical catalysis, and environmental remediation, 3D structures constructed by graphene sheets have been attempted over the past decade, giving birth to a new generation of graphene materials called 3D graphene materials. This review starts with the definition, classifications, brief history, and basic synthesis chemistries of 3D graphene materials. Then a critical discussion on the design considerations of 3D graphene materials for diverse applications is provided. Subsequently, after emphasizing the importance of normalized property characterization for the 3D structures, approaches for 3D graphene material synthesis from three major types of carbon sources (GO, hydrocarbons and inorganic carbon compounds) based on GO chemistry, hydrocarbon chemistry, and new alkali-metal chemistry, respectively, are comprehensively reviewed with a focus on their synthesis mechanisms, controllable aspects, and scalability. At last, current challenges and future perspectives for the development of 3D graphene materials are addressed.

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Section: Chemical Vapor Deposition (Cvd)mentioning

confidence: 99%

3D Graphene Materials: From Understanding to Design and Synthesis Control

2020

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“…Graphene is a nanomaterial that has a monolayer structure with a hexagonal honeycomb lattice composed of carbon atoms in sp 2 hybrid orbits, which has extraordinary physical and chemical properties . The main preparation methods of graphene are mechanical exfoliation, chemical vapor deposition (CVD) and oxidation‐reduction method . Among these methods, the mechanical exfoliation can not be synthesized in a large scale.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of TiO₂ Nanowires‐Reduced Graphene Oxide Nanocomposite to Enhance Electrochemical Performance in Supercapacitor

et al. 2018

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In this paper, uniform TiO 2 nanowires (TiO 2 NWs) on reduced graphene oxide (RGO) nanosheets were successfully synthesized by a simple and low-cost hydrothermal method. The high capacitance (202.5 F⋅g À 1 at 1 A⋅g À 1 ) and excellent cyclic stability (81.9% capacity retention after 5000 cycles) were achieved for TiO 2 NWs-RGO nanocomposite as supercapacitor electrode. The excellent electrochemical performance is due to the synergistic effect of one-dimensional TiO 2 NWs with chemical stability and RGO with excellent conductivity. Moreover, TiO 2 NWs can effectively avoid agglomeration, shorten the ion diffusion length and greatly facilitate the charge transfer both at the contact interfaces and within the electrode materials during the electrochemical process. A symmetric supercapacitor was successfully assembled using the TiO 2 NWs-RGO nanocomposite. It possesses a remarkable performance with a specific capacitance of 45.7 F⋅g À 1 , an energy density of 9.08 Wh⋅kg À 1 at a power density of 598 W⋅kg À 1 .[a] Prof.

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“…A single-layer Gr synthesized by chemical vapor deposition (CVD) was subsequently wet transferred onto the SiO 2 film. 22 Finally, a near-percolation Au film with a thickness of 8 nm was obtained by using low deposition rate of 0.2 Å s −1 during the Au thermal evaporation process. The wavelength (λ), pulse duration, and repetition rate of the fs-laser beam in operation were 520 nm, 250 fs, and 500 kHz, respectively.…”

Section: Methodsmentioning

confidence: 99%

Multilevel Anti-Counterfeiting Based on Covert Structural Features Embedded in Femtosecond-Laser-Treated Gold Nanocluster/Graphene Hybrid Layer

Jiang

Kim

Park

et al. 2022

ACS Appl. Mater. Interfaces

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The conventional nanoscale anti-counterfeiting scheme, exhibiting limited encoding capacity, faces growing challenges of being falsified with the advent of advanced highresolution equipment. In this study, we propose a multilevel anticounterfeiting device based on a femtosecond laser (fs-laser) treated plasmonic gold nanocluster/graphene (AuNC/Gr) hybrid structure integrated with a resonant cavity. The covert structural features encoded in random colored patterns, optical reflection spectra, and Raman spectra constitute three classes of anticounterfeiting signatures, which originate from the AuNC-covered Gr, which initiates plasmonic and thermal couplings. The attendant inverted thermal distribution is presumed to confine the structural features to the AuNC−Gr interface while leaving no detectable traces on the surface of AuNC/Gr even under advanced high-resolution equipment. Therefore, the proposed approach achieves multilevel anti-counterfeiting accomplishing physically unclonable functions in the form of random colored patterns, reflection spectra, and Raman spectra. As the first report for realizing remarkable optical modulation (i.e., random colored patterns) without any surface trace or damage via fs-laser−AuNC/Gr interaction, our study also discloses the outstanding performance of Gr in fs-laser-induced optothermoplasmonic lithography on near-percolation metal films. Simultaneously, the demonstrated fs-laser-processed plasmonic hybrid structure in conjunction with a resonant cavity is anticipated to expand the encoding capabilities for nanoscale anti-counterfeiting while avoiding the risk of being imitated because of the covert structural features.

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Direct CVD growth of graphene on three-dimensionally-shaped dielectric substrates

Cited by 30 publications

References 24 publications

3D Graphene Materials: From Understanding to Design and Synthesis Control

3D Graphene Materials: From Understanding to Design and Synthesis Control

Hydrothermal Synthesis of TiO₂ Nanowires‐Reduced Graphene Oxide Nanocomposite to Enhance Electrochemical Performance in Supercapacitor

Multilevel Anti-Counterfeiting Based on Covert Structural Features Embedded in Femtosecond-Laser-Treated Gold Nanocluster/Graphene Hybrid Layer

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Direct CVD growth of graphene on three-dimensionally-shaped dielectric substrates

Cited by 30 publications

References 24 publications

3D Graphene Materials: From Understanding to Design and Synthesis Control

3D Graphene Materials: From Understanding to Design and Synthesis Control

Hydrothermal Synthesis of TiO2 Nanowires‐Reduced Graphene Oxide Nanocomposite to Enhance Electrochemical Performance in Supercapacitor

Multilevel Anti-Counterfeiting Based on Covert Structural Features Embedded in Femtosecond-Laser-Treated Gold Nanocluster/Graphene Hybrid Layer

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Hydrothermal Synthesis of TiO₂ Nanowires‐Reduced Graphene Oxide Nanocomposite to Enhance Electrochemical Performance in Supercapacitor