Navigation Links
Study of electron orbits in multilayer graphene finds unexpected energy gaps
Date:8/10/2010

"Our findings hold the first indications of a small position-dependent interaction between the layers," said David L. Miller, the paper's first author and a graduate student in First's laboratory. "This interaction occurs only when the size of a cyclotron orbit which shrinks as the magnetic field is increased becomes smaller than the size of the observed patches."

The origin of the position dependent interaction is believed to be the "moir pattern" of atomic alignments between two adjacent layers of graphene. In some regions, atoms of one layer lie atop atoms of the layer below, while in other regions, none of the atoms align with the atoms in the layer below. In still other regions, half of the atoms have neighbors in the underlayer, an instance in which the symmetry of the carbon atoms is broken and the Landau level discrete energy level of the electrons splits into two different energies.

Experimentally, the researchers examined a sample of epitaxial graphene grown at Georgia Tech in the laboratory of Professor Walt de Heer, using techniques developed by his research team over the past several years.

They used the tip of a custom-built scanning-tunneling microscope (STM) to probe the atomic-scale electronic structure of the graphene in a technique known as scanning tunneling spectroscopy. The tip was moved across the surface of a 100-square nanometer section of graphene, and spectroscopic data was acquired every 0.4 nanometers.

The measurements were done at 4.3 degrees Kelvin to take advantage of the fact that energy resolution is proportional to the temperature. The scanning-tunneling microscope, designed and built by Joseph Stroscio at NIST's Center for Nanoscale Science and Technology, used a superconducting magnet to provide the magnetic fields needed to study the orbits.

According to First, the study raises a number of questions for future research, including how the energy gaps will affect electron t
'/>"/>

Contact: John Toon
jtoon@gatech.edu
404-894-6986
Georgia Institute of Technology Research News
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. Terrorist de-radicalization shows promise, comprehensive study finds
2. Vicept Therapeutics Announces Positive Clinical Study Results of V-101 for the Treatment of the Erythema of Rosacea
3. New Study Demonstrates Clinical Validity of EarlyCDT-Lung™
4. YM BioSciences announces conclusion of Phase I dose-escalation and expansion of ongoing CYT387 Phase I/II clinical study
5. Aeterna Zentaris Announces NIH Grant for a Phase 1/2 Study in Advanced Prostate Cancer with AEZS-108
6. DAIICHI SANKYO EUROPE GmbH Selects DATATRAK eClinical™ for Pan-European Systolic Hypertension Study
7. New England Journal of Medicine Publishes Data from Pivotal Phase 3 PROVENGE IMPACT Study
8. Angiotech Pharmaceuticals and partner Athersys announce positive results from phase I study of MultiStem(R) in heart attack patients
9. Aegera Therapeutics Reports Survival Data from the Phase 1 Portion of its Phase 1-2 Study of AEG35156 in Combination with Sorafenib in Patients with Advanced Hepatocellular Carcinoma
10. Study measures single-molecule machines in action
11. Recent Study Reports Reveals that HGH May Aid Performance
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Study of electron orbits in multilayer graphene finds unexpected energy gaps
(Date:9/1/2015)... Shire plc (LSE: SHP, NASDAQ: SHPG ) ... Board of Directors as a Non-Executive Director. Sara will also ... of the Shire Board. Both appointments will be effective as ... Chairman, President and Chief Executive Officer of Dun & Bradstreet, ... at D&B, she helped drive the transformation of the company ...
(Date:8/31/2015)... -- Research and Markets ( http://www.researchandmarkets.com/research/v7fdpx/argentina ) has announced ... - Growth, Trends & Forecasts (2014-2020)" report to ... market is estimated at $0.17 billion by 2018 at ... The near future will bring Biomedical sensors that ... These sensors can be set to trigger alerts when ...
(Date:8/31/2015)... /PRNewswire/ - Portage Biotech Inc. ("Portage" or "the Company") ... to announce that its wholly owned subsidiary, Portage Pharmaceuticals ... to an Investigational New Drug (IND) application for the ... recently completed a study in a rat model of ... significant efficacy and a more rapid onset of action ...
(Date:8/31/2015)... 31, 2015 LabStyle Innovations Corp. (OTCQB: ... today announced it recently closed a round of ... used to support the global rollout and initial ... cloud-based, diabetes management solution that includes novel software ... glucose monitoring device, and for working capital purposes. ...
Breaking Biology Technology:Shire Appoints Sara Mathew to Board of Directors 2Argentina Biomedical Sensors Market Report 2015 - Growth, Trends & Forecasts 2014-2020 2Portage's PPL will advance its lead candidate PPL-003 to an IND for dry eye disease and uveitis 2Portage's PPL will advance its lead candidate PPL-003 to an IND for dry eye disease and uveitis 3LabStyle Innovations Closes $2.5 Million Funding to Support Global Rollout of Dario Diabetes Management Solution 2LabStyle Innovations Closes $2.5 Million Funding to Support Global Rollout of Dario Diabetes Management Solution 3LabStyle Innovations Closes $2.5 Million Funding to Support Global Rollout of Dario Diabetes Management Solution 4
... June 24 The Board of,Directors of Schering-Plough Corporation ... 6.5 cents per common share. Payment will be made ... close of business on Aug.,1, 2008. As of March ... Board of Directors today also declared a quarterly dividend ...
... Sun Pharmaceutical,Industries Ltd. (Reuters: SUN.BO, Bloomberg: SUNP IN, NSE: ... Levitt, Chairman of the Board,of Directors of Taro Pharmaceutical ... Levitt,s letter of June 19, 2008 to Taro,s,shareholders, his ... the Initiating,Motion filed by Taro in the Tel-Aviv District ...
... etiquette tips via live, interactive ... ... a new way for life science post graduates to enhance their skills,and ... a dual-purpose service that,provides employers a chance to meet potential candidates, and ...
Cached Biology Technology:Sun Pharmaceutical Sends Second Letter to Taro Pharmaceutical Regarding Taro's Irish Subsidiary 2Sun Pharmaceutical Sends Second Letter to Taro Pharmaceutical Regarding Taro's Irish Subsidiary 3Sun Pharmaceutical Sends Second Letter to Taro Pharmaceutical Regarding Taro's Irish Subsidiary 4Sun Pharmaceutical Sends Second Letter to Taro Pharmaceutical Regarding Taro's Irish Subsidiary 5Sun Pharmaceutical Sends Second Letter to Taro Pharmaceutical Regarding Taro's Irish Subsidiary 6Sun Pharmaceutical Sends Second Letter to Taro Pharmaceutical Regarding Taro's Irish Subsidiary 7Online Career Tool Offers Live 'Expert Advice' Component 2
(Date:8/11/2015)... GOTHENBURG, Sweden , August 11, 2015 ... sensor FPC1155. Already received as well as expected revenues in 2015 ... included in FPC,s communicated revenue guidance of approximately 2,200 MSEK for ... is a prominent smartphone manufacturer ... ZUK selected FPC1 155 ...
(Date:8/6/2015)... Calif. , Aug. 6, 2015 ... developer of human interface solutions, today announced collaboration ... technologies on Windows 10. Microsoft leveraged Synaptics, deep ... the operating system. Through stringent ... are fully certified with Microsoft,s Precision TouchPad (PTP) ...
(Date:8/4/2015)...  AMRI (NASDAQ: AMRI ) today reported financial and operating ... Highlights: , Second quarter contract revenue of $ ... , Adjusted contract margins of 26 % ... $0.05 decrease in EPS from royalties in the current quarter ... "We are very pleased to present another strong financial quarter, ...
Breaking Biology News(10 mins):FPC's Touch Fingerprint Sensor FPC1155 in ZUK's Smartphone Z1 2Synaptics Chosen for Human Interface Co-Development on Windows 10 2AMRI Announces Second Quarter 2015 Results 2AMRI Announces Second Quarter 2015 Results 3AMRI Announces Second Quarter 2015 Results 4AMRI Announces Second Quarter 2015 Results 5AMRI Announces Second Quarter 2015 Results 6AMRI Announces Second Quarter 2015 Results 7AMRI Announces Second Quarter 2015 Results 8AMRI Announces Second Quarter 2015 Results 9AMRI Announces Second Quarter 2015 Results 10AMRI Announces Second Quarter 2015 Results 11AMRI Announces Second Quarter 2015 Results 12AMRI Announces Second Quarter 2015 Results 13AMRI Announces Second Quarter 2015 Results 14AMRI Announces Second Quarter 2015 Results 15AMRI Announces Second Quarter 2015 Results 16AMRI Announces Second Quarter 2015 Results 17AMRI Announces Second Quarter 2015 Results 18AMRI Announces Second Quarter 2015 Results 19AMRI Announces Second Quarter 2015 Results 20AMRI Announces Second Quarter 2015 Results 21AMRI Announces Second Quarter 2015 Results 22AMRI Announces Second Quarter 2015 Results 23AMRI Announces Second Quarter 2015 Results 24
... has comparable efficacy to chemotherapy, and is better ... has progressed quickly after treatment with first-line therapy, ... show. Dr Tudor Ciuleanu from the Institute ... finding from the international TITAN study at the ...
... have found that when growing corn crops for ethanol, more ... edition of the American Chemical Society,s journal Environmental Science ... fertilizer while they improve their production of feedstock for ethanol ... implications for an industry that has grown dramatically in recent ...
... York University,s Clinical and Translational Science Institute (CTSI) has ... grant to assess the feasibility of using gingival crevicular ... a blood glucose measurement -- as a means of ... between New York University,s Langone Medical Center and the ...
Cached Biology News:Erlotinib effective and with fewer side-effects after first-line treatment 2Overfertilizing corn undermines ethanol 2Overfertilizing corn undermines ethanol 3NYU nursing-dental team receives grant to assess effectiveness of A1C diabetes screening technique 2NYU nursing-dental team receives grant to assess effectiveness of A1C diabetes screening technique 3
... is a 20 amino acid synthetic peptide whose sequence corresponds to ... is (amino to carboxy terminus): V115 - L - P ... P - Q - V - P - N - E ... (The C-terminal cysteine has been added to facilitate conjugation and is ...
... The Rapid-Screen cDNA Library Panels were ... just three sets of PCRs to identify ... analysis is performed in a 96-well "Master ... from 5,000 clones. Having identified the positive ...
... Library Panels were designed for full-length gene ... PCRs to identify the desired cDNA clone. ... a 96-well "Master Plate," where each well ... identified the positive well(s) by gel electrophoresis ...
... Pathway 435 is an affordable, compact ... and slides, providing a broad array ... rapidly acquires high-resolution images with high-performance ... computer-controlled excitation and emission filter changers, ...
Biology Products: