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Journal ArticleDOI: 10.1002/SMLL.202007600

Graphene Transfer: Paving the Road for Applications of Chemical Vapor Deposition Graphene

04 Mar 2021-Small (Wiley)-Vol. 17, Iss: 48, pp 2007600
Abstract: Owing to the fascinating properties of graphene, fulfilling the promising characteristics of graphene in applications has ignited enormous scientific and industrial interest. Chemical vapor deposition (CVD) growth of graphene on metal substrates provides tantalizing opportunities for the large-area synthesis of graphene in a controllable manner. However, the tedious transfer of graphene from metal substrates onto desired substrates remains inevitable, and cracks of graphene membrane, transfer-induced doping, wrinkles as well as surface contamination can be incurred during the transfer, which highly degrade the performance of graphene. Furthermore, new issues can arise when moving to large-scale transfer at an industrial scale, thus cost-efficient and environment-friendly transfer techniques also become imperative. The aim of this review is to provide a comprehensive understanding of transfer-related issues and the corresponding experimental solutions and to provide an outlook for future transfer techniques of CVD graphene films on an industrial scale.

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Topics: Graphene (60%)
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7 results found


Open accessJournal ArticleDOI: 10.1016/J.APSUSC.2021.151818
Abstract: Carbon nanofilms are easier to integrate in electronic devices than their two-dimensional counterparts. With proper engineering, they can offer similar optical and electrical properties without any alteration because of material transfer effects. In the current research, amorphous carbon nanofilms with thicknesses of 2, 5 and 20 nm were prepared by electron beam evaporation onto glass substrates. The surface morphology, structural and optical properties were analyzed. Through ellipsometric analysis, the linear dielectric functions were quantified. The results confirm the presence of multiphase amorphous carbon structures in the films with different electronic hybridization. The 2 nm films which had the highest sp2/sp3 ratio exhibited a crossover wavelength at 397 nm related to epsilon near zero localization. The third-order nonlinear behavior close to this wavelength in all samples showed maximum response. Details and discussion of the preformed characterization and relation to potential applications are presented.

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Topics: Amorphous carbon (63%), Electron beam physical vapor deposition (54%), Carbon (52%) ... read more

1 Citations


Open accessJournal ArticleDOI: 10.3390/NANO11092414
Abdullah Al Faruque1, Syduzzaman2, Syduzzaman3, Joy Sarkar4  +2 moreInstitutions (4)
16 Sep 2021-Nanomaterials
Abstract: 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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Topics: Graphene (51%)

1 Citations



Open accessJournal ArticleDOI: 10.1016/J.FMRE.2021.08.001
Rong Jin1, Hongyan Lu1, Lei Cheng2, Jian Zhuang2  +2 moreInstitutions (2)
19 Aug 2021-
Abstract: Here, all-solid scanning electrochemical cell microscopy (SECCM) is first established by filling polyacrylamide (PAM) into nanocapillaries as a solid electrolyte. A solid PAM nanoball at the tip of a nanocapillary contacts graphene and behaves as an electrochemical cell for simultaneously measuring the morphology and electrochemical activity. Compared with liquid droplet-based SECCM, this solid nanoball is stable and does not leave any electrolyte at the contact regions, which permits accurate and continuous scanning of the surface without any intervals. Accordingly, the resolutions in the lateral (x-y) and vertical (z) directions are improved to ∼10 nm. The complete scanning of the wrinkles on graphene records low currents at the two sidewalls of the wrinkles and a relatively high current at the center of the wrinkles. The heterogeneity in the electrochemical activity of the wrinkle illustrates different electron transfer features on surfaces with varied curvatures, which is hardly observed by the current electrochemical or optical methods. The successful establishment of this high spatial electrochemical microscopy overcomes the current challenges in investigating the electrochemical activity of materials at the nanoscale, which is significant for a better understanding of electron transfer in materials.

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Topics: Electrochemical cell (54%), Graphene (51%), Microscopy (51%)

Open accessJournal ArticleDOI: 10.1063/5.0056413
Kaicheng Jia1, Jincan Zhang2, Yeshu Zhu1, Luzhao Sun  +2 moreInstitutions (3)
Abstract: Since its first successful isolation over a decade ago, academic and industrial interest has triggered the steady progress of the commercialization of graphene, as evidenced by a wealth of graphene-related patents, products, institutes, and startups. Among currently available graphene materials, graphene films derived from chemical vapor deposition (CVD) techniques, with fine controllability and uniformity, have been proven to be a promising candidate for various applications, with exciting demonstrations in electronics, optoelectronics, sensors, and filtering membrane. In this review, recent progress toward the commercialization of CVD films is summarized, covering the state-of-the-art methods for controllable synthesis, up-scale technologies for mass production, and demonstrations in potential commercial applications, which will propel the successful commercialization of graphene films by transforming the laboratory-scale advances. Moreover, a brief summary of the current market of CVD graphene films is provided with regarding to the commercial graphene products and production equipment. Finally, a perspective on the critical challenges and future direction of CVD graphene films will be presented.

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Topics: Graphene (51%)

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76 results found


Open accessJournal ArticleDOI: 10.1126/SCIENCE.1102896
Kostya S. Novoselov1, Andre K. Geim1, Sergey V. Morozov, Da Jiang1  +4 moreInstitutions (1)
22 Oct 2004-Science
Abstract: We describe monocrystalline graphitic films, which are a few atoms thick but are nonetheless stable under ambient conditions, metallic, and of remarkably high quality. The films are found to be a two-dimensional semimetal with a tiny overlap between valence and conductance bands, and they exhibit a strong ambipolar electric field effect such that electrons and holes in concentrations up to 10 13 per square centimeter and with room-temperature mobilities of ∼10,000 square centimeters per volt-second can be induced by applying gate voltage.

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Topics: Carbon film (57%), Hall effect (55%), Ambipolar diffusion (54%) ... read more

48,846 Citations


Open accessJournal ArticleDOI: 10.1126/SCIENCE.1171245
Xuesong Li1, Weiwei Cai1, Jinho An1, Seyoung Kim1  +9 moreInstitutions (2)
05 Jun 2009-Science
Abstract: Graphene has been attracting great interest because of its distinctive band structure and physical properties. Today, graphene is limited to small sizes because it is produced mostly by exfoliating graphite. We grew large-area graphene films of the order of centimeters on copper substrates by chemical vapor deposition using methane. The films are predominantly single-layer graphene, with a small percentage (less than 5%) of the area having few layers, and are continuous across copper surface steps and grain boundaries. The low solubility of carbon in copper appears to help make this growth process self-limiting. We also developed graphene film transfer processes to arbitrary substrates, and dual-gated field-effect transistors fabricated on silicon/silicon dioxide substrates showed electron mobilities as high as 4050 square centimeters per volt per second at room temperature.

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Topics: Graphene oxide paper (65%), Graphene nanoribbons (64%), Aerographene (63%) ... read more

9,917 Citations


Open accessJournal ArticleDOI: 10.1038/NNANO.2010.132
Sukang Bae1, Hyeongkeun Kim1, Youngbin Lee1, Xiangfan Xu2  +13 moreInstitutions (5)
Abstract: The outstanding electrical, mechanical and chemical properties of graphene make it attractive for applications in flexible electronics. However, efforts to make transparent conducting films from graphene have been hampered by the lack of efficient methods for the synthesis, transfer and doping of graphene at the scale and quality required for applications. Here, we report the roll-to-roll production and wet-chemical doping of predominantly monolayer 30-inch graphene films grown by chemical vapour deposition onto flexible copper substrates. The films have sheet resistances as low as approximately 125 ohms square(-1) with 97.4% optical transmittance, and exhibit the half-integer quantum Hall effect, indicating their high quality. We further use layer-by-layer stacking to fabricate a doped four-layer film and measure its sheet resistance at values as low as approximately 30 ohms square(-1) at approximately 90% transparency, which is superior to commercial transparent electrodes such as indium tin oxides. Graphene electrodes were incorporated into a fully functional touch-screen panel device capable of withstanding high strain.

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Topics: Graphene oxide paper (62%), Transparent conducting film (62%), Graphene foam (61%) ... read more

7,199 Citations


Open accessJournal ArticleDOI: 10.1126/SCIENCE.1156965
06 Jun 2008-Science
Abstract: There are few phenomena in condensed matter physics that are defined only by the fundamental constants and do not depend on material parameters. Examples are the resistivity quantum, h/e2 (h is Planck's constant and e the electron charge), that appears in a variety of transport experiments and the magnetic flux quantum, h/e, playing an important role in the physics of superconductivity. By and large, sophisticated facilities and special measurement conditions are required to observe any of these phenomena. We show that the opacity of suspended graphene is defined solely by the fine structure constant, a = e2/hc feminine 1/137 (where c is the speed of light), the parameter that describes coupling between light and relativistic electrons and that is traditionally associated with quantum electrodynamics rather than materials science. Despite being only one atom thick, graphene is found to absorb a significant (pa = 2.3%) fraction of incident white light, a consequence of graphene's unique electronic structure.

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Topics: Fine-structure constant (56%), Magnetic flux quantum (56%), Graphene (56%) ... read more

7,102 Citations


Open accessJournal ArticleDOI: 10.1038/NNANO.2010.172
Cory Dean1, Andrea Young1, Inanc Meric1, Changgu Lee  +7 moreInstitutions (2)
Abstract: Graphene devices on standard SiO(2) substrates are highly disordered, exhibiting characteristics that are far inferior to the expected intrinsic properties of graphene. Although suspending the graphene above the substrate leads to a substantial improvement in device quality, this geometry imposes severe limitations on device architecture and functionality. There is a growing need, therefore, to identify dielectrics that allow a substrate-supported geometry while retaining the quality achieved with a suspended sample. Hexagonal boron nitride (h-BN) is an appealing substrate, because it has an atomically smooth surface that is relatively free of dangling bonds and charge traps. It also has a lattice constant similar to that of graphite, and has large optical phonon modes and a large electrical bandgap. Here we report the fabrication and characterization of high-quality exfoliated mono- and bilayer graphene devices on single-crystal h-BN substrates, by using a mechanical transfer process. Graphene devices on h-BN substrates have mobilities and carrier inhomogeneities that are almost an order of magnitude better than devices on SiO(2). These devices also show reduced roughness, intrinsic doping and chemical reactivity. The ability to assemble crystalline layered materials in a controlled way permits the fabrication of graphene devices on other promising dielectrics and allows for the realization of more complex graphene heterostructures.

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Topics: Bilayer graphene (66%), Graphene (62%), Boron nitride (55%) ... read more

5,482 Citations


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No. of citations received by the Paper in previous years
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