Restoring self-limited growth of single-layer graphene on copper foil <i>via</i> backside coating

Reckinger, Nicolas; Casa, Marcello; Scheerder, Jeroen; Keijers, Wout; Paillet, Matthieu; Huntzinger, Jean-Roch; Haye, Emile; Felten, Alexandre; Vondel, Joris Van de; Sarno, Maria; Henrard, Luc; Colomer, Jean-François

doi:10.1039/c8nr09841g

Cited by 10 publications

(4 citation statements)

References 48 publications

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“…On rigid substrates, the Wang's group [15] as well as Rahimi and co-workers [16] have grown the material at wafer scale using germanium (Ge) or Cu as a catalyst, respectively. Besides Ge, transition metals or combination of transition metals are typically adopted as catalysts during the CVD growth to synthesize the carbon-based material [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Wafer-scale transfer-free process of multi-layered graphene grown by chemical vapor deposition

Ricciardella

Vollebregt

Boshuizen

et al. 2020

Mater. Res. Express

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Chemical vapour deposition (CVD) has emerged as the dominant technique to combine high quality with large scale production of graphene. The key challenge for CVD graphene remains the transfer of the film from the growth substrate to the target substrate while preserving the quality of the material. Avoiding the transfer process of single or multi-layered graphene (SLG-MLG) has recently garnered much more interest. Here we report an original method to obtain a 4-inch wafer fully covered by MLG without any transfer step from the growth substrate. We prove that the MLG is completely released on the oxidized silicon wafer. A hydrogen peroxide solution is used to etch the molybdenum layer, used as a catalyst for the MLG growth via CVD. X-ray photoelectron spectroscopy proves that the layer of Mo is etched away and no residues of Mo are trapped beneath MLG. Terahertz transmission near-field imaging as well as Raman spectroscopy and atomic force microscopy show the homogeneity of the MLG film on the entire wafer after the Mo layer etch. These results mark a significant step forward for numerous applications of SLG-MLG on wafer scale, ranging from micro/nano-fabrication to solar cells technology.

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Section: Introductionmentioning

confidence: 99%

Wafer-scale transfer-free process of multi-layered graphene grown by chemical vapor deposition

Ricciardella

Vollebregt

Boshuizen

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

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“…S6 provides optical microscope images of graphene transferred onto a 90 nm-thick SiO 2 /Si substrate, SEM (in-lens) images of graphene on Cu, and additional Raman measurements confirming the single layer nature (at 99.9%) and high structural quality of the produced graphene. The very small amount or absence of ad-layers in graphene grown on Cu film most likely arises from the fact that C species cannot be a formed on the catalyst backside and diffuse through its thickness as it has been demonstrated for Cu foils in the literature [32,39,40].…”

Section: Characterization and Device Fabricationmentioning

confidence: 90%

Multi-wafer batch synthesis of graphene on Cu films by quasi-static flow chemical vapor deposition

et al. 2019

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The chemical vapor deposition (CVD) of graphene on thin Cu film wafers is highly desirable for the development of technological applications as it offers superior flatness, rigidity, high purity, and compatibility with conventional thin film techniques. Here, we report the high-throughput synthesis of uniform single-layer highly crystalline graphene on a batch of 3-inch wafers. The production throughput is optimized by using closely-packed vertically-standing wafers instead of placing them flat on a horizontal support. Significantly reducing convective gas transport is found to be essential to minimize the variation of graphene single crystal seeding density and growth rate across individual wafers. Given the very small amount of carbon required to grow an atomically-thin layer, we show that graphene can be grown under static gas flow conditions and that the growth rate does not significantly vary from one wafer to another, even within a large batch (∼25 wafers). These findings constitute an important technological step toward the manufacturing of graphene on an industrial scale and its integration into mainstream electronics or micro-electromechanical devices.

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“…[ 54 ] For example, GR prepared by CVD might be contaminated by toxic metal ions when transferred from the metallic carrier. [ 55 ] And residual manganese‐containing reagent in the preparation of GO by the most established modified Hummer's method is highly toxic to cells. [ 54 ] So the purity of synthetic GFMs must be carefully controlled during preparation.…”

Section: Discussionmentioning

confidence: 99%

Development of Graphene‐Based Materials in Bone Tissue Engineaering

et al. 2021

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Currently, general treatments of criticalsized bone defects include autografts, allografts, and the use of bone regeneration biomaterials. [1] Autograft is the gold standard approach due to its satisfying osteogenicity. But it also faces drawbacks such as an invasive surgical operation for bone harvest and scarcity of available donor sites. [2] Allograft is accompanied by the risk of disease transmission and immunological rejection. [2] Therefore, significant efforts have been devoted to finding alternative approaches for bone regeneration. Bone tissue engineering (BTE) provides a promising alternative strategy to realize higher-level restoration of bone defects. BTE exploits the elaborate combination of scaffolds, seeding cells, and biological factors to form a functional substitute or assist in situ regeneration. In most BTE research, stem cells are implanted into defective bone sites with the support of a biomaterial-based scaffold and are supposed to proliferate and differentiate into osteoblasts to promote bone regeneration. However, the performances of many current BTE systems could not meet the therapeutic expectation due to problems such as insufficient osteogenic differentiation and limited vascularization. [3][4][5] Many studies tried to improve the performance of BTE via enhancing the properties of the biomaterial-based scaffold. [6] In addition to traditional macroor microscale forms of metals, ceramics, and polymers, their nanoscale counterparts have been extensively explored for BTE due to their unique properties. [7][8][9][10] Ever since Andre Geim and Konstantin Novoselov [11] discovered a simple and feasible method for graphene isolation, graphene family materials (GFMs) have attracted great interest in regenerative medicine and tissue engineering. In BTE, bGBMs show promising potentials such as mechanical strength, high specific surface, and adsorption ability. [12][13][14][15][16][17] According to the composition, bGBMs could be categorized into GFMs and GFMs-containing composite materials (GCMs). GFMs refer to graphene and its derivatives, containing 0D graphene quantum dots (GQDs), 2D graphene (GR), graphene oxide (GO), and reduced graphene oxide (rGO), 3D graphite, etc. Among them, GQDs, GR, GO, and rGO could be obtained by chemical approaches using graphite as the starting material. GCMs are composite materials consisting of GFMs and other materials such Bone regeneration-related graphene-based materials (bGBMs) are increasingly attracting attention in tissue engineering due to their special physical and chemical properties. The purpose of this review is to quantitatively analyze mass academic literature in the field of bGBMs through scientometrics software CiteSpace, to demonstrate the rules and trends of bGBMs, thus to analyze and summarize the mechanisms behind the rules, and to provide clues for future research. First, the research status, hotspots, and frontiers of bGBMs are analyzed in an intuitively and vividly visualized way. Next, the extracted important subjects such as fabricatio...

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Restoring self-limited growth of single-layer graphene on copper foil via backside coating

Cited by 10 publications

References 48 publications

Wafer-scale transfer-free process of multi-layered graphene grown by chemical vapor deposition

Wafer-scale transfer-free process of multi-layered graphene grown by chemical vapor deposition

Multi-wafer batch synthesis of graphene on Cu films by quasi-static flow chemical vapor deposition

Development of Graphene‐Based Materials in Bone Tissue Engineaering

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