Facile growth of vertically-aligned graphene nanosheets via thermal CVD: The experimental and theoretical investigations

Wang, Huaping; Gao, Enlai; Liu, Peng; Zhou, Duanliang; Geng, Dechao; Xue, Xudong; Wang, Liping; Jiang, Kaili; Xu, Zhiping; Yu, Gui

doi:10.1016/j.carbon.2017.05.074

Cited by 59 publications

(51 citation statements)

References 55 publications

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“…Another, low temperature graphene fabrication, also on a high K dielectric material was demonstrated by the same team on ZrO 2 , again with acetylene and at a low temperature of 480 °C with acetylene as the precursor 65. Another group showed vertically grown graphene sheets could form on ZrO 2 through thermal CVD using methane or ethanol as the precursor 66. This work was also interesting because typically PECVD is required for vertical graphene growth.…”

Section: Substrate Systems For Graphene Synthesis By Cvdmentioning

confidence: 94%

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Substrate Developments for the Chemical Vapor Deposition Synthesis of Graphene

Shi

Tokarska

et al. 2020

Adv Materials Inter

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Since the isolation of graphene and numerous demonstrations of its unique properties, the expectations for this material to be implemented in many future commercial applications have been enormous. However, to date, challenges still remain. One of the key challenges is the fabrication of graphene in a manner that satisfies processing requirements. While transfer of graphene can be used, this tends to damage or contaminate it, which degrades its performance. Hence, there is an important drive to grow graphene directly over a number of technologically important materials, viz., different substrate materials, so as to avoid the need for transfer. One of the more successful approaches to synthesis graphene is chemical vapor deposition (CVD), which is well established. Historically, transition metal substrates are used due to their catalytic properties. However, in recent years this has developed to include many nonmetal substrate systems. Moreover, both solid and molten substrate forms have also been demonstrated. In addition, the current trend to progress flexible devices has spurred interest in graphene growth directly over flexible materials surfaces. All these aspects are presented in this review which presents the developments in available substrates for graphene fabrication by CVD, with a focus primarily on large area graphene.

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Section: Substrate Systems For Graphene Synthesis By Cvdmentioning

confidence: 94%

“…wafers 54. Vertical graphene growth over quartz by CVD has also been shown over quartz substrates66 and suggests it is a rather versatile substrate for graphene formation. In the case of vertical graphene, this can also occur over carbon buffer layers 70…”

Section: Substrate Systems For Graphene Synthesis By Cvdmentioning

confidence: 97%

Substrate Developments for the Chemical Vapor Deposition Synthesis of Graphene

Shi

Tokarska

et al. 2020

Adv Materials Inter

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“…Carbon-based materials fabricated by catalytic chemical vapor deposition (CVD), such as graphene, carbon nanotubes (CNTs), carbon nanofibers (CNFs), diamond and microcrystalline graphite, have good electrical properties [1][2][3][4]. They are considered as ideal candidates for field emitters [5,6]. Especially, CNTs exhibit superior structural advantages over other allotropes in terms of emitting electrons due to their unique sharp emitting nano-tips that increase local field strength easily [7,8].…”

Section: Introductionmentioning

confidence: 99%

Controllable Synthesis of Special Reed-Leaf-Like Carbon Nanostructures Using Copper Containing Catalytic Pyrolysis for High-Performance Field Emission

et al. 2019

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Special reed-leaf-like carbon nanostructures have been realized by using chemical vapor deposition (CVD) under the combined action of copper containing catalytic pyrolysis and ammonia (NH3) gas. The nucleation and growth mechanisms of CNLs based on growth parameters are discussed. The Raman spectra of carbon nanotubes (CNTs), CNLs and CNT-CNL composites were measured and found to be strongly influenced by the type of gas. Field emission (FE) properties of CNL-CNT composites were observed with a lower turn-on electric field of 0.73 V/µm, and a higher current density of 18.0 mA/cm2 at an electric field of 2.65 V/µm, which are superior to those of CNTs and flower-like CNLs. This is because there are more field emitters in CNLs inter-planted in CNTs. We consider that the unique FE stability of CNTs and defects in CNLs play a synergetic role on the improved FE properties.

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“…[36,37] Films with high-density nanosheets were used in our experiments (Figure 1a). The films were prepared on Si or SiO 2 substrate with a thermal CVD method.…”

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confidence: 99%

“…The films were prepared on Si or SiO 2 substrate with a thermal CVD method. [36] The basic structure of our sensor device is shown in Figure 1c. Special layered texture of the films containing some underlying continuous buffer layer and also vertically oriented graphene sheets of about 100-300 nm in height upon the layers had been verified with varied methods.…”

mentioning

confidence: 99%

Highly Sensitive, Low Voltage Operation, and Low Power Consumption Resistive Strain Sensors Based on Vertically Oriented Graphene Nanosheets

Jiang

Tang

Wang

et al. 2019

Adv Materials Technologies

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Stretchable sensors, including integration of traditional sensors on soft substrates and direct employment of stretchable sensitive materials, have attracted much attention from both researchers and engineers recently. Among them, the strain and pressure sensors for transverse stretch and vertical compression have shown promising potential in applications in fields such as electronic skin, electronic fabrics, human-computer interface, and health care. [1][2][3][4][5][6] As the strain and also the pressure sensing are mainly based on the deformation of the sensitive material, they are often detectable with in-equable sensitivity by a single device. [7] A strain or pressure sensor can signify micromovement of muscles such as the voice, artery pulses, and facial expressions, which makes it possible for health monitoring, medical diagnosis, and even assistance of drug delivery. [8][9][10][11][12] Metal and semiconductor materials are commonly used for strain sensors. The metallic strain sensors are restricted by low sensitivity while the semiconductor ones have thermal effect and resistive drift during the stretching process, which limits the sensor resolution.Graphene and carbon nanotubes, known for their excellent mechanical property and thermal stability, have provided better choices for strain sensors and been extensively studied. [13][14][15][16][17][18][19] It has been shown that, single layer graphene is not sensitive enough to strains. It is often used as function layers to structure strain sensors which makes the fabrication process much more complicated. [13,14] A great deal of other graphene related materials have then been explored. Graphene overlaps, [15][16][17] quasi-3D graphene films, [20,21] and polymers incorporated with graphene [22][23][24] are among the most studied to construct strain sensors. Better device performance has been achieved with them. However, building a high-performance strain sensor based on graphene for practical utilization is still a big challenge.Structure modification is a commonly applied method to enhance the device performance for the materials mentioned above. Properties such as the sensitivity and signal-to-noise ratio (SNR) can be improved this way. Model-transferring, benefiting from the advantages of simplicity, low cost, and time Flexible and stretchable electronics are essential module of mobile wearable devices, soft human-machine interfaces, and also e-skin on biomedical prostheses and biorobotics. Strain sensors, as one of the major part of flexible electronics, have been extensively studied recently. When being used for mobile and long-term applications, low power consumption and low operation voltage beside high sensitivity and fast response of the sensors are required. Easy integration is also an important aspect to build an internet of things. Here, resistive strain sensors with a maximum gauge factor of 150, a fast response time of about 10 ms, a low operation voltage of 20 mV, and a low power consumption of <8 µW, are demonstrated by introducing easily patt...

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Facile growth of vertically-aligned graphene nanosheets via thermal CVD: The experimental and theoretical investigations

Cited by 59 publications

References 55 publications

Substrate Developments for the Chemical Vapor Deposition Synthesis of Graphene

Substrate Developments for the Chemical Vapor Deposition Synthesis of Graphene

Controllable Synthesis of Special Reed-Leaf-Like Carbon Nanostructures Using Copper Containing Catalytic Pyrolysis for High-Performance Field Emission

Highly Sensitive, Low Voltage Operation, and Low Power Consumption Resistive Strain Sensors Based on Vertically Oriented Graphene Nanosheets

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