Vertically oriented few-layer graphene as an electron field-emitter

Behura, Sanjay K.; Mukhopadhyay, Indrajit; Hirose, Akira; Yang, Q.; Jani, Omkar

doi:10.1002/pssa.201329172

Cited by 22 publications

(17 citation statements)

References 41 publications

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“…In this technique, the carbon precursors are decomposed on the Cu surfaces because of its low carbon solubility and the self-limiting factor. 6−10 The resulting graphene on the metal substrate can be easily transferred to any desirable substrates by a simple transferring process without affecting much of the properties of graphene. Recently, gaseous hydrocarbons and liquid carbon sources have been replaced by forthcoming solid carbon sources such as camphor (C 10 H 16 O), polystyrene, and so forth by a very facile and low cost approach to achieve a large-area MLG on Cu foil with an optimum optoelectronic properties.…”

Section: Introductionmentioning

confidence: 99%

Controlled Island Formation of Large-Area Graphene Sheets by Atmospheric Chemical Vapor Deposition: Role of Natural Camphor

et al. 2019

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Camphor-based mono-/bilayer graphene (MLG) sheets have been synthesized by very facile atmospheric chemical vapor deposition processes on Si/SiO 2 , soda lime glass, and flexible polyethylene terephthalate films. The effect of camphor concentration with respect to distance between camphor and the Cu foil ( D ) has been varied to investigate the controlled formation of a homogeneous graphene sheet over a large area on Cu foil. Raman studies show a remarkable effect of camphor at a typical distance ( D ) to form a monolayer to multilayer graphene (MULG) sheet. The signature of MLG to MULG sheets appears due to increase in the number of nucleation sites, even over the subsequent domains that contribute stacks of graphene over each other as observed by high-resolution transmission electron microscopy images. Moreover, the increase in camphor concentration at a particular distance generates more defect states in graphene as denoted by D band at 1360 cm –1 . Uniform distribution of large-area MLG demonstrates an intense 2D/G ratio of ∼2.3. Electrical and optical measurements show a sheet resistance of ∼1 kΩ/sq with a maximum transmittance of ∼88% at 550 nm for low camphor concentration. An improvement in the rectification and photodiode behavior is observed from the diodes fabricated on n-Si/MULG as compared to n-Si/MLG in dark and light conditions.

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Section: Introductionmentioning

confidence: 99%

Controlled Island Formation of Large-Area Graphene Sheets by Atmospheric Chemical Vapor Deposition: Role of Natural Camphor

et al. 2019

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“…The typical characteristic bands of 3D‐Gr that are the D ‐band (1350 cm −1 ), G ‐band (1580 cm −1 ), and 2 D ‐band (2700 cm −1 ) appear. [ 14,15 ] The distinct D ‐band existing in all samples can be attributed to the abundantly exposed edges of nanosized 3D‐Gr. In addition, all samples exhibit a shoulder peak around at 1620 cm −1 , which is named as D ′‐band.…”

Section: Resultsmentioning

confidence: 97%

2D Graphene in Interface Engineering of 3D Graphene‐Based Thermal Management

Zhao

Feng

Zhu

et al. 2020

Physica Status Solidi (a)

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Three‐dimensional graphene (3D‐Gr) has a unique construction and special thermal features, thus providing promising opportunities for application in thermal management devices. Herein, 2D graphene (2D‐Gr) is introduced as an interfacial layer in plasma‐assisted chemical vapor deposition (PACVD); then, in situ growth of 3D‐Gr is achieved on a germanium (Ge) substrate. Systematic experiments are conducted to study and analyze the synthesis mechanism. Finally, the obtained 2D/3D‐Gr integrations are developed for the application in high‐performance thermal management. By measuring and comparing the thermal heating performance of the pure 3D‐Gr device and 2D/3D‐Gr device, it is determined that the combination of 3D‐Gr with 2D‐Gr significantly improves their thermal heating behavior, benefiting from the improved quality of 3D‐Gr assisted by the 2D‐Gr interfacial layer. The investigations offer an effective strategy for synthesizing high‐quality 3D‐Gr and 2D/3D‐Gr integrations, which pave the way for the development of high‐performance thermal management devices.

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“…Under high temperatures and certain conditions, carbon atoms are deposited on the metal surface using a mixture of methane and hydrogen or other carbon sources to form large-area graphene film [ 127 , 128 ]. Chemical vapor deposition mainly includes thermal CVD, plasma-enhanced CVD, and hot filament CVD [ 129 , 130 , 131 ]. These methods can control the growth thickness and size of graphene.…”

Section: Terahertz Detectors Made By Different Graphene Preparation Methodsmentioning

confidence: 99%

Recent Progress in the Development of Graphene Detector for Terahertz Detection

Liu

Jiang

et al. 2021

Sensors

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Terahertz waves are expected to be used in next-generation communications, detection, and other fields due to their unique characteristics. As a basic part of the terahertz application system, the terahertz detector plays a key role in terahertz technology. Due to the two-dimensional structure, graphene has unique characteristics features, such as exceptionally high electron mobility, zero band-gap, and frequency-independent spectral absorption, particularly in the terahertz region, making it a suitable material for terahertz detectors. In this review, the recent progress of graphene terahertz detectors related to photovoltaic effect (PV), photothermoelectric effect (PTE), bolometric effect, and plasma wave resonance are introduced and discussed.

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Vertically oriented few-layer graphene as an electron field-emitter

Cited by 22 publications

References 41 publications

Controlled Island Formation of Large-Area Graphene Sheets by Atmospheric Chemical Vapor Deposition: Role of Natural Camphor

Controlled Island Formation of Large-Area Graphene Sheets by Atmospheric Chemical Vapor Deposition: Role of Natural Camphor

2D Graphene in Interface Engineering of 3D Graphene‐Based Thermal Management

Recent Progress in the Development of Graphene Detector for Terahertz Detection

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