Navigation Links
Real-world graphene devices may have a bumpy ride
Date:1/20/2011

p>This effect is especially pronounced when the group exposes the substrate-mounted graphene to high magnetic fields. Then the electrons, already made sluggish by the substrate interactions, lack the energy to scale the mountains of resistance and settle into isolated pockets of "quantum dots," nanometer-scale regions that confine electrical charges in all directions.

It's not all bad news. Direct access to the graphene with a scanned probe also makes it possible to investigate the physics of other substrate interactions on a nanoscopic scale, something which is less possible in conventional semiconductor devices where the important transport layers are buried below the surface.

"Usually, we cannot study insulators at atomic scale," says Stroscio. "The STM works with a closed loop system that keeps a constant tunneling current by adjusting the tip-sample distance. On an insulator there is no current available, so the system will keep pushing the tip closer to the substrate until it eventually crashes into the surface. The graphene lets us get close enough to these substrate materials to study their electrical properties, but not so close that we damage the substrate and instrument."


'/>"/>

Contact: Mark Esser
mark.esser@nist.gov
301-975-8735
National Institute of Standards and Technology (NIST)
Source:Eurekalert

Page: 1 2

Related biology technology :

1. HealthCore Responds to Need for Real-world Health Outcomes Information on Drugs and Devices with Physician Network and Prospective Effectiveness Research
2. Industry Professionals Get Schooled in Real-World Oncology Issues at NCCN Academy
3. Graphene pioneers follow in Nobel footsteps
4. New graphene-based material clarifies graphite oxide chemistry
5. Researchers discover method for mass production of nanomaterial graphene
6. Light-speed nanotech: Controlling the nature of graphene
7. Scientists prove graphenes edge structure affects electronic properties
8. Graphene yields secrets to its extraordinary properties
9. Graphene may have advantages over copper for IC interconnects at the nanoscale
10. Bilayer graphene gets a bandgap
11. Material world: Graphenes versatility promises new applications
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/31/2014)... 2014 Rogne Bioscience, a privately-held biotechnology company ... , has acquired a licence to anti-inflammatory peptides from ... potent anti-inflammatory activity of the peptides was discovered by ... Oxford,s Sir William Dunn School of Pathology. ... $1.5 million in seed financing, is developing a first-in-class, ...
(Date:7/31/2014)... , July 31, 2014 Research ... "Global Genomics Market 2014-2018" report to their ... Genomics is the study of the genetic material ... be a strong basis for the discovery and development ... human diseases or health conditions. Genomics is supported by ...
(Date:7/31/2014)... SHENZHEN, China , July 31, 2014 /PRNewswire/ ... of an Irys™System by BGI , ... to enable comprehensive exploration of human structural variation (SV) ... of interest, including those where no reference exists. In ... new methods for multiplexing on the Irys System, enabling ...
(Date:7/31/2014)... Canada (PRWEB) July 31, 2014 ... some of the first transcriptome-wide analyses appearing around ... standard assay for RNA measurement. In the last ... throughput, more specific, work with smaller input amounts, ... tissues (eg, blood samples). On the bioinformatics side, ...
Breaking Biology Technology:Oxford licenses anti-inflammatory peptides to San Francisco Bay Area start-up 2Oxford licenses anti-inflammatory peptides to San Francisco Bay Area start-up 3Global Genomics Market 2014-2018: Key Vendors are F. Hoffmann-La Roche, Life Technologies, Qiagen and Illumina 2BioNano Genomics Announces the Purchase of the Irys System by BGI 2BioNano Genomics Announces the Purchase of the Irys System by BGI 3BioNano Genomics Announces the Purchase of the Irys System by BGI 4The Evolution of RNA-Sequencing, Upcoming Live Webinar August 22 hosted by Xtalks 2
... patients with high expression of EpCAM , , ... MITI ), a biopharmaceutical company developing novel, proprietary ... diseases, presented data from a clinical trial investigating its ... chemotherapeutic docetaxel in patients with metastatic breast cancer (MBC) ...
... When he died recently ... lasting impact on both agriculture and weed science around the globe. He devoted his life ... farmers. Thousands of students have followed in his footsteps and are now making their own contribution ... Lawrence, ...
... - OncoGenex Pharmaceuticals, Inc. (NASDAQ: OGXI ) ... presented during an oral presentation at the American Society ... of April 2009 showed that OGX-427 was well tolerated ... circulating tumor cells at all doses evaluated as well ...
Cached Biology Technology:Micromet Presents Update at ASCO 2009 on a Phase 1b Combination Study of Adecatumumab and Docetaxel 2Micromet Presents Update at ASCO 2009 on a Phase 1b Combination Study of Adecatumumab and Docetaxel 3Micromet Presents Update at ASCO 2009 on a Phase 1b Combination Study of Adecatumumab and Docetaxel 4Micromet Presents Update at ASCO 2009 on a Phase 1b Combination Study of Adecatumumab and Docetaxel 5Blazing Trails: Dr. Ellery Knake Remembered for His Contributions to Weed Science 2Blazing Trails: Dr. Ellery Knake Remembered for His Contributions to Weed Science 3Blazing Trails: Dr. Ellery Knake Remembered for His Contributions to Weed Science 4OncoGenex Pharmaceuticals Announces OGX-427 Treatment Demonstrates Safety, Evidence of Declines in Circulating Tumor Cells and Reductions in Tumor Markers in a Phase 1 Cancer Trial 2OncoGenex Pharmaceuticals Announces OGX-427 Treatment Demonstrates Safety, Evidence of Declines in Circulating Tumor Cells and Reductions in Tumor Markers in a Phase 1 Cancer Trial 3OncoGenex Pharmaceuticals Announces OGX-427 Treatment Demonstrates Safety, Evidence of Declines in Circulating Tumor Cells and Reductions in Tumor Markers in a Phase 1 Cancer Trial 4OncoGenex Pharmaceuticals Announces OGX-427 Treatment Demonstrates Safety, Evidence of Declines in Circulating Tumor Cells and Reductions in Tumor Markers in a Phase 1 Cancer Trial 5
(Date:7/31/2014)... team of scientists from Spain, France, and the ... that is the oldest definitive member of the ... amber. The discovery and description were made possible ... synchrotron imaging technique, which allows the detailed study ... new species is described in the journal ...
(Date:7/31/2014)... how the brain processes speech, potentially increasing the ... at The University of Texas at Dallas. , ... Ear and Hearing , researchers demonstrated for the ... brain,s recognition of speech sounds. , Noise-induced hearing ... affecting an estimated 15 percent of Americans between ...
(Date:7/31/2014)... Fire was in full fury, raging swiftly from crown ... backcountry of Yosemite National Park in California,s Sierra Nevada ... battle began to turn, enacting a case study in ... fuel large, severe fires. , "When the Rim Fire ... had been used as a management tool, rather than ...
Breaking Biology News(10 mins):UT Dallas study reveals effect of loud noises on brain 2The Rim Fire 1 year later: A natural experiment in fire ecology and management 2The Rim Fire 1 year later: A natural experiment in fire ecology and management 3The Rim Fire 1 year later: A natural experiment in fire ecology and management 4The Rim Fire 1 year later: A natural experiment in fire ecology and management 5
... August 30, 2010Anger, depression, and helplessness are the main ... Deepwater Horizon oil spill in the Gulf ... effects, according to an interview in Ecopsychology, a peer-reviewed, ... www.liebertpub.com ). The interview is available free online at ...
... School of Public Health (BUSPH) epidemiologists has found that ... less likely to give birth prematurely. Preterm birth ... -- is the leading cause of infant morbidity and ... unknown, said Rohini Hernandez, the study,s lead author and ...
... in heart muscle cells, which is associated with heart ... to decline, according to a new study by researchers ... A. Carver College of Medicine. The structure is ... membrane called T-tubules. This network is essential for transmitting ...
Cached Biology News:Devastating psychological effects of BP Gulf disaster are explored in Ecopsychology journal 2BUSPH study observes link between decongestant use in pregnant women and lower risk of preterm birth 2Structural defects precede functional decline in heart muscle 2
The Wellwash 4 Mk 2 microplate washer combines flexibility, simplicity and ease of use. This reliable microplate washer meets the exacting standards of today's ELISA assay requirements....
... MLF1 Interacting Protein/PBIP1 (phospho T78) ( ... Antigen: Synthetic ... 73-83 of Human MLF1 Interacting Protein ... 359815 Swiss ...
... Nuclease is a genetically engineered endonuclease. This ... and RNA while having no proteolytic activity. ... of conditions and possesses an exceptionally high ... acids from recombinant proteins, its use enables ...
... save space and organize gloves, safety ... They are the perfect benchtop storage ... labs, processing and manufacturing. Clear static-dissipative ... particles they attract. Many other sizes ...
Biology Products: