Navigation Links
Water could hold answer to graphene nanoelectronics
Date:10/26/2010

olecules," published this week by the journal Small. See the full paper at: http://dx.doi.org/10.1002/smll.201001384

In its natural state, graphene has a peculiar structure but no band gap. It behaves as a metal and is known as a good conductor. This is compared to rubber or most plastics, which are insulators and do not conduct electricity. Insulators have a large band gap an energy gap between the valence and conduction bands which prevents electrons from conducting freely in the material.

Between the two are semiconductors, which can function as both a conductor and an insulator. Semiconductors have a narrow band gap, and application of an electric field can provoke electrons to jump across the gap. The ability to quickly switch between the two states "on" and "off" is why semiconductors are so valuable in microelectronics.

"At the heart of any semiconductor device is a material with a band gap," Koratkar said. "If you look at the chips and microprocessors in today's cell phones, mobile devices, and computers, each contains a multitude of transistors made from semiconductors with band gaps. Graphene is a zero band gap material, which limits its utility. So it is critical to develop methods to induce a band gap in graphene to make it a relevant semiconducting material."

The symmetry of graphene's lattice structure has been identified as a reason for the material's lack of band gap. Koratkar explored the idea of breaking this symmetry by binding molecules to only one side of the graphene. To do this, he fabricated graphene on a surface of silicon and silicon dioxide, and then exposed the graphene to an environmental chamber with controlled humidity. In the chamber, water molecules adsorbed to the exposed side of the graphene, but not on the side facing the silicon dioxide. With the symmetry broken, the band gap of graphene did, indeed, open up, Koratkar said. A
'/>"/>

Contact: Michael Mullaney
mullam@rpi.edu
518-276-6161
Rensselaer Polytechnic Institute
Source:Eurekalert  

Page: 1 2 3

Related biology technology :

1. Waters Corporation and UCLA to Convene Leading Life Scientists
2. High-speed filter uses electrified nanostructures to purify water at low cost
3. MO BIO Laboratories, Inc. DNA Isolation Products Used to Analyze Microbes Present in Deepwater Horizon Oil Plume
4. FRC Systems International State-of-the-art Industrial Wastewater Treatment Systems
5. Indian Multinational Company Confirms USD 6 Million Order to Set up Industrial Waste Water Treatment Plants in Africa
6. A warmer future for watersports
7. Zymes’ Water Soluble CoQ10 Decreases Symptoms in Animal Models of Parkinson’s Disease
8. DuPont Leader: Agricultural Improvements Key to Meeting Growing Food, Water Needs in Africa
9. Florida Water Resources Annual Conference Focuses on Numeric Nutrient and Other Water Issues
10. Waters and DAISO Sign Marketing Agreement for Bulk Process Chromatography Media
11. Life Sciences Venture Capital Funding Overcomes Record Lows, Outpaces Other Sectors, According to PricewaterhouseCoopers
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Water could hold answer to graphene nanoelectronics
(Date:12/24/2014)... Dec. 23, 2014 Vermillion, Inc. (Nasdaq: ... gynecologic disease, announced today that investors including Oracle ... Fund LLC and several Vermillion directors have agreed ... of Vermillion,s common stock and warrants to purchase ... private placement.  Under the terms ...
(Date:12/24/2014)... Dec. 23, 2014 Sigma-Aldrich Corporation (NASDAQ: ... waiting period under the Hart-Scott-Rodino Antitrust Improvements Act ... on December 22, 2014, thereby completing the U.S. ... the acquisition of the Company by Merck KGaA, ... satisfies another condition to closing the transaction, which ...
(Date:12/24/2014)... and NEW YORK , Dec. ... its open-label pilot study of mazindol in children with ... and Therapy in December 2014 . ... in children with attention deficit/hyperactivity disorder" ( Konofal et ... 2014 Dec 1;8:2321-2332. eCollection 2014 ) shows that ...
(Date:12/22/2014)... ROCKVILLE, Md. , Dec. 22, 2014 ... MKT: SYN), a developer of pathogen-specific therapies ... focus on protecting the microbiome, today announced ... a Phase 1a clinical trial of SYN-004, ... the prevention of Clostridium difficile (C. ...
Breaking Biology Technology:Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 2Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 3Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 4Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 5Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 2Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 3Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 2Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 3Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 2Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 3Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 4Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 5
... over the Badger state pavilion at the annual BIO convention ... visit the New York State exhibit to breathe gardenia-scented oxygen ... has grown to be as competitive as biotechnology, most states, ... the crowd. Welcome to the world of bio-branding. , ,Wisconsins ...
... DEMOletter know that I've written regularly about so- called social ... columns have run under titles such as "I'm LinkedIn - ... networks to both user and investor. I wasn't being critical, ... model for these services. , ,But in recent weeks, ...
... is currently undergoing a historical transformation. Such ... War I, when the paper, brewing, automotive and ... , ,The change from an agriculture and manufacturing-based ... is inevitable. Wisconsin now finds itself competing ...
Cached Biology Technology:Whats in a name? Quite a bit, when youre competing in biotech 2Social networks and my big a-ha 2Social networks and my big a-ha 3Social networks and my big a-ha 4Educate, innovate and execute: Wisconsins model for success 2Educate, innovate and execute: Wisconsins model for success 3
(Date:12/10/2014)... WINSTON-SALEM, N.C. , Dec. 9, 2014  Wake Forest ... medical education building for its School of Medicine. Funding ... a larger capital campaign that will be publicly launched ... will be located in the former 60 series R.J. ... Forest Innovation Quarter. Construction will begin immediately with plans ...
(Date:12/5/2014)... MOUNTAIN VIEW, Calif. , Dec. 4, 2014 ... and safety has boosted investments in new testing ... products has also given rise to a range ... driven by the requirements of Generation Y, which ... digital technologies. As a result, product development strategies ...
(Date:12/3/2014)... , Dec. 2, 2014 As part of ... Inception Technologies is pleased to announce the release of ... customers to collect the workforce data that they need. ... have been left by existing readers. Many such devices ... connectivity and modern technology. Older models force users to ...
Breaking Biology News(10 mins):Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 3Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 4Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 3Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 4Inception Technologies to Release New Biometric Reader 2
... 35 headwater basins in the United States and Canada found ... was less than expected in many locations, suggesting that some ... The study was just published in a special issue ... Ecological Research (LTER) network of 26 sites around the country ...
... new Rice University study this week in the journal Science ... -- from the realms of tectonic plates down to molecular bonds ... below ground. "Everything throughout history shows us that Earth does ... said Rice geochemist Cin-Ty Lee, the lead author of the study. ...
... New England is expected to experience a "moderate" regional ... in the Gulf of Maine to study the toxic algae ... no direct threat to human beings, however the toxins they ... clams which can cause paralytic shellfish poisoning (PSP) in humans ...
Cached Biology News:Impact of warming climate doesn't always translate to streamflow 2Copper chains: Study reveals Earth's deep-seated hold on copper 2Copper chains: Study reveals Earth's deep-seated hold on copper 3Researchers report potential for a 'moderate' New England 'red tide' in 2012 2Researchers report potential for a 'moderate' New England 'red tide' in 2012 3Researchers report potential for a 'moderate' New England 'red tide' in 2012 4
Mouse VEGF R1/Flt-1 Allophycocyanin MAb (Clone 141522) Keywords: Receptor Tyrosine Kinase, RTK, VEGFR1, VEGF Receptor 1 Protein Family: Receptor Tyrosine Kinases, VEGF/PDGF Family...
Evi-1 Antibody Shipping Temperature: Cold Storage Temperature: -20C...
Immunogen: Synthetic peptide: N(171) H G F L S A D Q QL I K(183) Storage: -20 C, Avoid Freeze/Thaw Cycles...
HIV-1 TAT (vN-21)...
Biology Products: