CVD growth of large-area graphene over Cu foil by atmospheric pressure and its application in H2 evolution

Ye, Shu; Ullah, Kefayat; Zhu, Lihua; Ali, Asghar; Jang, Won Kweon; Oh, Won‐Chun

doi:10.1016/j.solidstatesciences.2015.05.010

Cited by 11 publications

(3 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is also known as a zero-gap material with excellent electronic and thermal properties [1][2][3]. Several known methods such as chemical vapour deposition (CVD), electrochemical exfoliation (EC), Hummers, and so on have gained interest in the scientific community for graphene production [3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Porous GaN-Based UV Photodetector with Graphene Cladding

et al. 2021

View full text Add to dashboard Cite

This work presents the role of graphene in improving the performance of a porous GaN-based UV photodetector. The porous GaN-based photodetector, with a mean pore diameter of 35 nm, possessed higher UV sensitivity, about 95% better compared to that of the as-received (non-porous) photodetector. In addition, it exhibits a lower magnitude of leakage current at dark ambient, about 70.9 μA, compared to that of the as-received photodetector with 13.7 mA. However, it is also highly resistive in nature due to the corresponding electrochemical process selectively dissolute doped regions. Herein, two types of graphene, derived from CVD and the electrochemical exfoliation (EC) process, were cladded onto the porous GaN region. The formation of a graphene/porous GaN interface, as evident from the decrease in average distance between defects as determined from Raman spectroscopy, infers better charge accumulation and conductance, which significantly improved UV sensing. While the leakage current shows little improvement, the UV sensitivity was greatly enhanced, by about 460% and 420% for CVD and EC cladded samples. The slight difference between types of graphene was attributed to the coverage area on porous GaN, where CVD-grown graphene tends to be continuous while EC-graphene relies on aggregation to form films.

show abstract

Section: Introductionmentioning

confidence: 99%

Improvement of Porous GaN-Based UV Photodetector with Graphene Cladding

et al. 2021

View full text Add to dashboard Cite

show abstract

“…A study conducted on the tribological properties of graphene shows that graphene's structure enables it to bond easily with other carbon allotropes to repair holes in a sheet (Batzill, 2012). There are several emerging methods to produce graphene, such as organic synthesis, chemically derived, unzipping carbon nano-tubes, mechanical exfoliation and also deposition (Stankovich et al, 2007;Ji et al, 2011;Singh et al, 2011;Avouris and Dimitrakopoulos, 2012;Sharma et al, 2014;Ye et al, 2015;Saiful Badri et al, 2017). Thus far, deposition is the most practical method to produce graphene on a large scale, as it is more easily controlled.…”

Section: Introductionmentioning

confidence: 99%

“…Basically, the CVD method is a method for thin film deposition, induced by a chemical reaction. Transition metals such as nickel (Ni) and copper (Cu) act as catalyst and substrate, which can be used to grow graphene (Arco et al, 2009;Wintterlin and Bocquet, 2009;Berman et al, 2013;Won, Penkov and Kim, 2013;Al-Shurman and Naseem, 2014;Sharma et al, 2014;Ye et al, 2015;Salifairus et al, 2016). The CVD method synthesises graphene on the substrate surface by heating the sources up to its gas transient point (Tg).…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrogen on graphene growth from solid waste products by chemical vapour deposition: friction coefficient properties

Tahir

Abdollah

Tamaldin

et al. 2018

ILT

View full text Add to dashboard Cite

Purpose The purpose of this paper is to study the effect of hydrogen (H2) gas on the graphene growth from fruit cover plastic waste (FCPW) and oil palm fibre (OPF), as a solid feedstock, towards the coefficient of friction (COF) properties. Design/methodology/approach Graphene film growth on copper (Cu) substrate was synthesised from FCPW and OPF, as a solid feedstock, using the chemical vapour deposition (CVD) method, at atmospheric pressure. The synthesised graphene was characterised using Raman spectroscopy, Scanning Electron Microscopy (SEM) and Electron Dispersed Spectroscopy (EDS). Surface hardness and roughness were measured using a nano-indenter and surface profilometer, respectively. Then, a dry sliding test was executed using a ball-on-disc tribometer at constant speed, sliding distance and load, with coated and uncoated copper sheet as the counter surface. Findings The presence of H2 gas reduced the running-in time of the dry sliding test. However, there is no significant effect at the constant COF region, where the graphene growth from FCPW shows the lowest COF among other surfaces. Research limitations/implications This paper is limited to graphene growth using the CVD method with selected parameters. Originality/value To the authors’ knowledge, this is the first paper on growing graphene from palm oil fiber via the CVD method and its subsequent analysis, based on friction coefficient properties.

show abstract

Effect of Gas Atmosphere in the Heating Stage on Limiting Nucleation of Graphene on Copper Foils by Low Pressure Chemical Vapor Deposition

Shi

Wang

Ren

et al. 2020

Crystal Research and Technology

View full text Add to dashboard Cite

To investigate the effect of gas atmosphere in the heating stage of graphene fabrication on graphene nucleation, hydrogen and nitrogen are introduced into the furnace respectively in the heating stage. The results show that graphene growing on copper foils heated in nitrogen atmosphere and in hydrogen atmosphere present different nucleation characteristics. The analysis implies that the gas atmosphere in the heating stage affects the graphene nucleation and growth by changing the morphology of the copper surface and the inherent carbon concentration in the substrate, and this change actually results from the interaction of the copper surface and the gas atmosphere. The difference in size and quality of the fabricated graphene domains also indicates nitrogen atmosphere in the heating stage favors fabricating large‐sized graphene domains with good quality. Thus, substituting hydrogen for nitrogen in the heating stage would be a simpler and easier way to depress graphene nucleation as well as improve the graphene quality.

show abstract

CVD growth of large-area graphene over Cu foil by atmospheric pressure and its application in H2 evolution

Cited by 11 publications

References 37 publications

Improvement of Porous GaN-Based UV Photodetector with Graphene Cladding

Improvement of Porous GaN-Based UV Photodetector with Graphene Cladding

Effect of hydrogen on graphene growth from solid waste products by chemical vapour deposition: friction coefficient properties

Effect of Gas Atmosphere in the Heating Stage on Limiting Nucleation of Graphene on Copper Foils by Low Pressure Chemical Vapor Deposition

Contact Info

Product

Resources

About