Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Meter-sized single-crystal graphene growth becomes possible

22.08.2017

"Preparation determines the future". Since the discovery of graphene, the synthesis of graphene has long been a hot spot in graphene community. Using transition metals such as Cu or Ni as substrate, scientists have realized the preparation of large-area graphene films.

Especially, high-quality large-scale continuous monolayer graphene has been successfully grown on Cu foils. This simple and low-cost method has been widely accepted as the most promising way for industrial-level graphene production.


These are schematic diagrams for epitaxial growth of single-crystal graphene on industrial Cu foil.

Credit: ©Science China Press

However, graphene films obtained by this method are usually polycrystalline with domain boundaries, which would greatly degrade the electrical, mechanical, thermal and optical properties. Therefore, to find a method to synthesize large-size single-crystal graphene is a big scientific problem needed to be solved.

Prof. K. H. Liu, Prof. D. P. Yu and Prof. E. G. Wang from Peking University cooperating with Prof. F. Ding from Ulsan National Institute of Science and Technology and other collaborators found a new way to prepare 5×50 cm2 single-crystal graphene on industrial Cu foils (Science Bulletin 2017, 62, 1074).

They first transformed industrial polycrystalline Cu foils into single-crystal Cu(111) by thermal annealing using a temperature-gradient-driving technique. Graphene domains were epitaxially grown on the Cu(111) substrate and then seamlessly merged together to form a large single-crystal graphene films.

Combined with their ultrafast graphene growth technique (Nature Nanotechnology 2016, 11, 930), the graphene growth rate and each individual graphene domain size were improved obviously. Also, oxygen released from oxide at high temperature was proved to further improve the domain alignment, which would greatly improve the quality of graphene films.

This reported technique allows the synthesis of large-size single-crystal graphene films, which possess superior properties for various high-end applications, especially in electronics, such as large-scale fabrication of THz devices and the transparent film replacing ITO. It will also enable the epitaxial growth of various other 2D single-crystal materials on graphene with meter-sized dimension.

###

This research was supported by National Key R&D Program of China (2016YFA0300903, 2016YFA0300802, 2014CB932500 and 2016YFA0200101), National Natural Science Foundation of China (51522201, 11474006, 11327902, 11234001, 21525310, 91433102 and 21573186), Postdoctoral Innovative Personnel Support Program (BX201700014) and National Program for Thousand Young Talents of China and the Institute for Basic Science (IBS-R019-D1) of Korea.

See the articles:

Xiaozhi Xu, Zhihong Zhang, Jichen Dong, Ding Yi, Jingjing Niu, Muhong Wu, Li Lin, Rongkang Yin, Mingqiang Li, Jingyuan Zhou, Shaoxin Wang, Junliang Sun, Xiaojie Duan, Peng Gao, Ying Jiang, Xiaosong Wu, Hailin Peng, Rodney S. Ruoff, Zhongfan Liu, Dapeng Yu, Enge Wang, Feng Ding, Kaihui Liu, Ultrafast Epitaxial Growth of Metre-Sized Single-Crystal Graphene on Industrial Cu Foil, Science Bulletin, 2017, 62(15):1074-1080

http://www.sciencedirect.com/science/article/pii/S209592731730350X

Xiaozhi Xu, Zhihong Zhang, Lu Qiu, Jianing Zhuang, Liang Zhang, Huan Wang, Chongnan Liao, Huading Song, Ruixi Qiao, Peng Gao, Zonghai Hu, Lei Liao, Zhimin Liao, Dapeng Yu, Enge Wang, Feng Ding, Hailin Peng, Kaihui Liu. Ultrafast growth of single-crystal graphene assisted by a continuous oxygen supply. Nature Nanotechnology 2016, 11, 930-935

http://www.nature.com/nnano/journal/v11/n11/full/nnano.2016.132.html

K. H. Liu | EurekAlert!

More articles from Materials Sciences:

nachricht Watching atoms move in hybrid perovskite crystals reveals clues to improving solar cells
22.11.2017 | University of California - San Diego

nachricht Fine felted nanotubes: CAU research team develops new composite material made of carbon nanotubes
22.11.2017 | Christian-Albrechts-Universität zu Kiel

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: New proton record: Researchers measure magnetic moment with greatest possible precision

High-precision measurement of the g-factor eleven times more precise than before / Results indicate a strong similarity between protons and antiprotons

The magnetic moment of an individual proton is inconceivably small, but can still be quantified. The basis for undertaking this measurement was laid over ten...

Im Focus: Frictional Heat Powers Hydrothermal Activity on Enceladus

Computer simulation shows how the icy moon heats water in a porous rock core

Heat from the friction of rocks caused by tidal forces could be the “engine” for the hydrothermal activity on Saturn's moon Enceladus. This presupposes that...

Im Focus: Nanoparticles help with malaria diagnosis – new rapid test in development

The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.

Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

IceCube experiment finds Earth can block high-energy particles from nuclear reactions

24.11.2017 | Physics and Astronomy

A 'half-hearted' solution to one-sided heart failure

24.11.2017 | Health and Medicine

Heidelberg Researchers Study Unique Underwater Stalactites

24.11.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>