Layer‐Controlled and Wafer‐Scale Synthesis of Uniform and High‐Quality Graphene Films on a Polycrystalline Nickel Catalyst

Gong, Yue; Zhang, Xuemin; Liu, Guangtong; Wu, Liqiong; Geng, Xueli; Long, Mingsheng; Cao, Xiaohui; Guo, Yikun; Li, Weiwei; Xu, Jingxian; Sun, Mengtao; Lü, Li; Liu, Liwei

doi:10.1002/adfm.201200388

Cited by 96 publications

(68 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For this purpose, after carburizing Ni with CH 4 the substrate temperature rises under H 2 to a segregation temperature (onto 50 Cº above) [26]. This results in dissolution and removal of disordered graphene layers on the Ni surface.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of Graphenic Carbon Materials on Nickel Particles with Controlled Quantity of Carbon

Grehov

Kalnacs

Mishnev

et al. 2016

Latvian Journal of Physics and Technical Sciences

View full text Add to dashboard Cite

A cheap, comparatively simple and effective method is proposed for the large quantity production of the sheets of graphenic carbon materials (GCM) by annealing the mixture of nickel powder with a suitable carbon amount at the temperatures close to 1000 ºC. The number of graphene layers in the sheets of GCM may be varied by altering the amount of carbon in the mixture and parameters of annealing and drying of the obtained products. Samples of GCM were prepared in the form of heat-dried GCM paper and in the form of graphene sponge with freeze-drying. The appearance of GCM on the surface of Ni particles was identified using a scanning electron microscope (SEM) at a low accelerating voltage of 5 kV. The thickness and properties of the layers were investigated by electron microscopy and X-ray diffraction. The fabrication processes were carried out at the concentrations of added carbon from 0 to 1 at%. The results obtained are fully consistent with the well-known solid phase reactions of carbon dissolution in Ni at 1000 °C and graphene or graphite precipitation on the surface with cooling down to the room temperatures.

show abstract

Section: Resultsmentioning

confidence: 99%

“…It should be noted that the average value of thickness corresponds to real thickness, if the main growth of GCM layers occurs fiberwise on domains (111) during the diffusion directly through bulk Ni [24], [26].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Graphenic Carbon Materials on Nickel Particles with Controlled Quantity of Carbon

Grehov

Kalnacs

Mishnev

et al. 2016

Latvian Journal of Physics and Technical Sciences

View full text Add to dashboard Cite

show abstract

“…However, since too much Cu was blown off at 1000 • C, the optimum temperature for graphene generation was 970 • C. Other metals besides Cu can also be used as graphene growth catalysts such as nickel and cobalt. Bubble transfer can separate graphene from these metal catalysts without chemical etching [31][32][33]. Our next research project is to use the metals for graphene growth and bubble transfer.…”

Section: Discussionmentioning

confidence: 99%

Contamination-Free Graphene Transfer from Cu-Foil and Cu-Thin-Film/Sapphire

Lee

2017

Coatings

View full text Add to dashboard Cite

Abstract:The separation of graphene grown on metallic catalyst by chemical vapor deposition (CVD) is essential for device applications. The transfer techniques of graphene from metallic catalyst to target substrate usually use the chemical etching method to dissolve the metallic catalyst. However, this causes not only high material cost but also environmental contamination in large-scale fabrication. We report a bubble transfer method to transfer graphene films to arbitrary substrate, which is nondestructive to both the graphene and the metallic catalyst. In addition, we report a type of metallic catalyst, which is 700 nm of Cu on sapphire substrate, which is hard enough to endure against any procedure in graphene growth and transfer. With the Cr adhesion layer between sapphire and Cu film, electrochemically delaminated graphene shows great quality during several growth cycles. The electrochemical bubble transfer method can offer high cost efficiency, little contamination and environmental advantages.

show abstract

“…Figure 6. Relationship between optical microscope image and typical Raman spectra of monolayer [48,[59][60][61], bilayer [47,59,60,62], few layer [63][64][65], and multilayer [63,64] graphene.…”

Section: Figure 5amentioning

confidence: 99%

Optimization of the Synthesis Procedures of Graphene and Graphite Oxide

López¹,

Palomino²,

Silva³

et al. 2016

Recent Advances in Graphene Research

View full text Add to dashboard Cite

The optimization of both the chemical vapor deposition (CVD) synthesis method to prepare graphene and the Improved Hummers method to prepare graphite oxide is reported. Copper and nickel were used as catalysts in the CVD-graphene synthesis, CH 4 and H 2 being used as precursor gases. Synthesis variables were optimized according to a thickness value, calculated using a homemade Excel-VBA application. In the case of copper, the maximum thickness value was obtained for those samples synthesized at 1050°C, a CH 4 /H 2 flow rate ratio of 0.07 v/v, a total flow of 60 Nml/min, and a time on stream of 10 min. In the case of nickel, a reaction temperature of 980°C, a CH 4 /H 2 flow rate ratio of 0.07 v/v, a total flow of 80 Nml/min, and a time on stream of 1 min were required to obtain a high thickness value. On the other hand, the Improved Hummers method used in the synthesis of graphite oxide was optimized. The resultant product was similar to that reported in literature in terms of quality and characteristics but both time and cost of the synthesis procedure were considerably decreased.

show abstract

Layer‐Controlled and Wafer‐Scale Synthesis of Uniform and High‐Quality Graphene Films on a Polycrystalline Nickel Catalyst

Cited by 96 publications

References 32 publications

Synthesis of Graphenic Carbon Materials on Nickel Particles with Controlled Quantity of Carbon

Synthesis of Graphenic Carbon Materials on Nickel Particles with Controlled Quantity of Carbon

Contamination-Free Graphene Transfer from Cu-Foil and Cu-Thin-Film/Sapphire

Optimization of the Synthesis Procedures of Graphene and Graphite Oxide

Contact Info

Product

Resources

About