Large-Area Synthesis and Growth Mechanism of Graphene by Chemical Vapor Deposition

Wang, Chen; Vinodgopal, K.; Dai, Gui-Ping

doi:10.5772/intechopen.79959

Cited by 16 publications

(25 citation statements)

References 96 publications

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“…Graphene is commonly produced by exfoliation from graphite [28,29], epitaxial growth on SiC [30] or chemical vapor deposition (CVD) [31,32]. In particular, CVD produces uniform and large-scale graphene flakes of high-quality and is compatible with the silicon technology; therefore, it has been largely exploited to realize new electronic devices such as diodes [33][34][35][36], transistors [37][38][39], field emitters [40,41], chemical-biological sensors [42,43], optoelectronic systems [44], photodetectors [45][46][47][48][49][50] and solar cells [51].…”

Section: Introductionmentioning

confidence: 99%

Contact resistance and mobility in back-gate graphene transistors

et al. 2020

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The metal-graphene contact resistance is one of the major limiting factors toward the technological exploitation of graphene in electronic devices and sensors. High contact resistance can be detrimental to device performance and spoil the intrinsic great properties of graphene. In this paper, we fabricate back-gate graphene field-effect transistors with different geometries to study the contact and channel resistance as well as the carrier mobility as a function of gate voltage and temperature. We apply the transfer length method and the y-function method showing that the two approaches can complement each other to evaluate the contact resistance and prevent artifacts in the estimation of carrier mobility dependence on the gate-voltage. We find that the gate voltage modulates both the contact and the channel resistance in a similar way but does not change the carrier mobility. We also show that raising the temperature lowers the carrier mobility, has a negligible effect on the contact resistance, and can induce a transition from a semiconducting to a metallic behavior of the graphene sheet resistance, depending on the applied gate voltage. Finally, we show that eliminating the detrimental effects of the contact resistance on the transistor channel current almost doubles the carrier field-effect mobility and that a competitive contact resistance as low as 700 Ω·μm can be achieved by the zig-zag shaping of the Ni contact.

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Section: Introductionmentioning

confidence: 99%

Contact resistance and mobility in back-gate graphene transistors

et al. 2020

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“…Chemical vapour deposition (CVD) is one of the most popular way and widely used in forming monolayered graphene and producing relatively high-quality graphene in large scale production. Typically, CVD is a simple chemical reaction process that uses carbon source (gas, liquid, or solid) and decomposes at high-temperature condition, in which resulted in carbon atoms in the metal surface which eventually is graphene membrane [36]. Besides, the deposition method comprises homogeneous gas-phase reaction and chemical reaction.…”

Section: Chemical Vapour Deposition (Cvd) Methodsmentioning

confidence: 99%

Development of graphene based nanocomposites towards medical and biological applications

Mousavi

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Hashemi

et al. 2020

Artificial Cells, Nanomedicine, and Biotechnology

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Graphene and its derivative materials present high potential towards medical and biological applications, including drug delivery and bioimaging, due to their exceptional properties such as thermal conductivity and high specific surface area. The main focus of this work is to review the current development of graphene materials and the derivatives for biocompatible, bioimaging and drug delivery applications. Also, the synthesis methods with variation of graphene nanocomposites and the functionalisation will be further explained. For the graphene approaches, chemical vapour deposition (CVD) is the best-known technique to make high-quality graphene sheet by growth route with mass production. By considering the organic graphene nanocomposites, the biocompatibility and cytotoxic effects against graphene nanocomposites were evaluated for biomedical employments such as high quality bioimaging and effective drug delivery for cancer treatments. For example, graphene oxide incorporated with PEG and loaded with SN 38 for camptothecin analolgue as anticancer drug and revealed high cytotoxicity has an effect of 1000 times better effect than CPT in HCT-116 cells. Their drug delivery ability for both in-vivo and in-vitro applications compared to the controlled drugs such as doxorubicin (DOX) will be discussed accordingly. The graphene and its deriavatives possess some intriguing properties, which will lead to drug delivery due to strong biocompatibility and cyctotoxic effect towards biomedicine applications.

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“…The chemical vapour deposition technique has recently received considerable attention because of the large-scale graphene synthesis with controlled architecture and low defects [ 173 , 174 , 175 , 176 ]. The CVD technique encompasses four main stages: (i) activation of feed gases, (ii) chemical reaction, (iii) formation of graphene nanomaterials, and (iv) deposition on a suitable substrate.…”

Section: Production Process Of Graphene-based Materialsmentioning

confidence: 99%

A Review on the Production Methods and Applications of Graphene-Based Materials

et al. 2021

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Graphene-based materials in the form of fibres, fabrics, films, and composite materials are the most widely investigated research domains because of their remarkable physicochemical and thermomechanical properties. In this era of scientific advancement, graphene has built the foundation of a new horizon of possibilities and received tremendous research focus in several application areas such as aerospace, energy, transportation, healthcare, agriculture, wastewater management, and wearable technology. Although graphene has been found to provide exceptional results in every application field, a massive proportion of research is still underway to configure required parameters to ensure the best possible outcomes from graphene-based materials. Until now, several review articles have been published to summarise the excellence of graphene and its derivatives, which focused mainly on a single application area of graphene. However, no single review is found to comprehensively study most used fabrication processes of graphene-based materials including their diversified and potential application areas. To address this genuine gap and ensure wider support for the upcoming research and investigations of this excellent material, this review aims to provide a snapshot of most used fabrication methods of graphene-based materials in the form of pure and composite fibres, graphene-based composite materials conjugated with polymers, and fibres. This study also provides a clear perspective of large-scale production feasibility and application areas of graphene-based materials in all forms.

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Large-Area Synthesis and Growth Mechanism of Graphene by Chemical Vapor Deposition

Cited by 16 publications

References 96 publications

Contact resistance and mobility in back-gate graphene transistors

Contact resistance and mobility in back-gate graphene transistors

Development of graphene based nanocomposites towards medical and biological applications

A Review on the Production Methods and Applications of Graphene-Based Materials

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