Navigation Links
Penn physicists develop scalable method for making graphene

tion, which involves blowing methane over thin sheets of metal. The carbon atoms in methane form a thin film of graphene on the metal sheets, but the process must be done in a near vacuum to prevent multiple layers of carbon from accumulating into unusable clumps.

The Penn team's research shows that single-layer-thick graphene can be reliably produced at normal pressures if the metal sheets are smooth enough.

"The fact that this is done at atmospheric pressure makes it possible to produce graphene at a lower cost and in a more flexible way," Luo, the study's lead author, said.

Whereas other methods involved meticulously preparing custom copper sheets in a costly process, Johnson's group used commercially available copper foil in their experiment.

"You could practically buy it at the hardware store," Johnson said.

Other methods make expensive custom copper sheets in an effort to get them as smooth as possible; defects in the surface cause the graphene to accumulate in unpredictable ways. Instead, Johnson's group "electropolished" their copper foil, a common industrial technique used in finishing silverware and surgical tools. The polished foil was smooth enough to produce single-layer graphene over 95% of its surface area.

Working with commercially available materials and chemical processes that are already widely used in manufacturing could lower the bar for commercial applications.

"The overall production system is simpler, less expensive, and more flexible" Luo said.

The most important simplification may be the ability to create graphene at ambient pressures, as it would take some potentially costly steps out of future graphene assembly lines.

"If you need to work in high vacuum, you need to worry about getting it into and out of a vacuum chamber without having a leak," Johnson said. "If you're working at atmospheric pressure, you can imagine electropolishing the copper, deposi

Contact: Evan Lerner
University of Pennsylvania

Page: 1 2 3

Related biology technology :

1. Physicists isolate bound states in graphene-superconductor junctions
2. UCSB physicists challenge classical world with quantum-mechanical implementation of shell game
3. Physicists take new look at the atom
4. Rice physicists discover ultrasensitive microwave detector
5. UC Riverside physicists pave the way for graphene-based spin computer
6. UBC, Max Planck formalize partnership among worlds top quantum physicists
7. Physicists capture first images of atomic spin
8. U-M physicists create first atomic-scale map of quantum dots
9. Physicists at UC Santa Barbara make discovery in quantum mechanics
10. NYU physicists find way to explore microscopic systems through holographic video
11. Nanophysicists find unexpected magnetic effect
Post Your Comments:
(Date:6/3/2015)... 02, 2015 Research and Markets ... of the "2015 Strategies in the ... to their offering. This new ... immunoprotein diagnostic market, including emerging tests, technologies, ... profiles of leading suppliers. During ...
(Date:6/3/2015)... Minn. , June 3, 2015 ... that supports the entire spectrum of clinical research, is ... iMedNet eClinical technology platform will ... by the end of this month.  iMedNet ... – built from the ground up by MedNet Solutions, ...
(Date:6/3/2015)... 2015 Typical racks for laboratory freezers ... and depths often taking up unnecessary room in already ... Low 5 Box Freezer Racks offer a customizable ... freezer storage boxes and freezers. , “These racks ... experiments or multiple people because users can configure freezer ...
(Date:6/3/2015)... 2015 Green Earth Energy has restructured ... support the RCBC Waste to Energy system. Paul ... the family business, which has been ... added recycling to their waste collection services in 2012 ... the Fortune 500 companies with manufacturing plants in West ...
Breaking Biology Technology:United States Strategies in the Immunoprotein Diagnostic Testing Market Report 2015 2MedNet Announces "2015 Feature 1" Release Of iMedNet eClinical 2Freezer Space Can Now Be Configured Your Way with New Modular Freezer Racks 2
... BioNeutral Group, Inc. ("BioNeutral") (OTC Bulletin Board: BONU), ... that at ATS Labs, using a Quantitative Disk ... (C.diff) spores, BioNeutral,s Ygiene(TM) Hospital Grade antimicrobial delivered ... Clostridium Difficile, an extremely dangerous and difficult to ...
... Novavax, Inc. (Nasdaq: NVAX ) ... their joint venture in India under the agreement signed ... joint venture, called CPL Biologicals Pvt. Ltd., will develop ... using technology contributed from Novavax and Cadila Pharmaceuticals. ...
... safety of their drinking water for granted, that ordinary tap ... of Tel Aviv University,s School of Physics and Astronomy. ... natural disaster or sabotage, the physicist has developed a new ... water supply in real time. Modifying special fibers ...
Cached Biology Technology:BioNeutral's Ygiene(TM) Hospital Grade Antimicrobial Demonstrates a 99.9997% Kill Rate Against Clostridium Difficile Spores (C.diff) in Independent Lab Pre-testing Phase 2BioNeutral's Ygiene(TM) Hospital Grade Antimicrobial Demonstrates a 99.9997% Kill Rate Against Clostridium Difficile Spores (C.diff) in Independent Lab Pre-testing Phase 3Cadila Pharmaceuticals Launches Joint Venture With Novavax in India 2Cadila Pharmaceuticals Launches Joint Venture With Novavax in India 3Cadila Pharmaceuticals Launches Joint Venture With Novavax in India 4Monitoring water through a snake's eyes 2Monitoring water through a snake's eyes 3
(Date:5/29/2015)... May 28, 2015 Research and Markets ... the "Facial Recognition Market by Solution, by ... Forecast to 2020" report to their offering. ... facial recognition technology become more efficient and cost ... traction and investment from the commercial sector. The ...
(Date:5/27/2015)... , May 27, 2015   ... medication safety systems and image documentation solutions ... of comprehensive, technologically-advanced automation solutions, is pleased ... integration. The Codonics® Safe Label System® (SLS), ... in conjunction with the Omnicell Anesthesia Workstation, ...
(Date:5/25/2015)... -- Australia,s market for wearable technologies is considered to be ... of several trials and prototypes. The release of the ... ignite interest in wearables as well as accelerate sales ... This in turn will spur greater innovation from other ... vendors and distributors. Photo - ...
Breaking Biology News(10 mins):Global advanced Facial Recognition Market Expected to Grow From $2.77 Billion in 2015 to $6.19 Billion in 2020, at an Estimated CAGR of 17.4% 2Codonics and Omnicell Expand Partnership 2Codonics and Omnicell Expand Partnership 3Codonics and Omnicell Expand Partnership 4Australian wearables market to grow at CAGR of 78%; revenue of A$1 billion by 2018, says Frost & Sullivan 2Australian wearables market to grow at CAGR of 78%; revenue of A$1 billion by 2018, says Frost & Sullivan 3Australian wearables market to grow at CAGR of 78%; revenue of A$1 billion by 2018, says Frost & Sullivan 4
... reserves such as gold, diamond and natural gas isn,t ... look. Now researchers at Tel Aviv University have modernized the ... signs of lucrative resources that could lurk beneath our feet. ... first time, Prof. Lev Eppelbaum of TAU,s Department of ...
... Bethesda, MDA new research report published in The ... and scientists better understand a rare genetic disease that ... decreased vision called Enhanced S-Cone Syndrome or Goldman-Favre Syndrome. ... genes responsible for the healthy renewal of rods and ...
... had officials along the East Coast preparing for mass ... the University of Delaware were grabbing their best data ... It was a rare opportunity for the scientists ... as Irene threatened to be the biggest hurricane to ...
Cached Biology News:The geophysicist's guide to striking it rich 2Scientists unravel the cause of rare genetic disease: Goldman-Favre Syndrome explained 2Hurricane Irene: Scientists collect water quality and climate change data from huge storm 2
... include: ,ICC and IHC Protocol Development ... ,Antibody Screenings in Animal or Human ... of Cells and Tissues ,Peroxidase, Alkaline ... Fluorescent, or Electron Microscopy ,Protein Localization ...
... the optimization of immunostaining. ... the primary antibody, selection and ... Alk. Phos., HRP, fluorescence, or ... evaluation by light or fluorescence ...
Request Info...
Request Info...
Biology Products: