Navigation Links
Researchers use graphene quantum dots to detect humidity and pressure
Date:5/8/2013

ading the currents one can tell the humidity in the environment."

Decreasing the distance between the graphene quantum dots by 0.35 nanometers increased the device's conductivity by 43-fold, Berry said. Furthermore, because air contains water, reducing air pressure decreased its water content and caused the graphene quantum dots to get closer together, which increased conductivity. Quantum mechanics suggests that electrons have a finite probability to tunnel from an electrode to a nonconnected electrode, Berry said. This probability is inversely and exponentially proportional to the tunneling distance, or the gap between the electrodes.

The research has numerous applications, particularly in improving sensors for humidity, pressure or temperature.

"These devices are unique because, unlike most humidity sensors, these are more responsive in vacuum," Berry said. "For example, these devices can be incorporated into space shuttles, where low humidity measurements are required. These sensors might also be able to detect trace amounts of water on Mars, which has 1/100th of the earth's atmospheric pressure. This is because the device measures humidity at a much higher resolution in vacuum."

While the heart of the device is the modulation of electron tunneling, the response of the device is through the polymer microfiber, Berry said. His team also is looking at changing the polymer to find other applications for this research.

"If you replace this polymer with a polymer that is responsive to other stimuli, you can make a different kind of sensor," Berry said. "I envision this project to have a broad impact on sensing."

The research is supported by Berry's five-year, $400,000 National Science Foundation CAREER award. The research results appear in a recent issue of the journal Nano Letters in an article titled "Electron-tunneling modulation in percolating-network of graphene quantum dots: fabrication, phenomenologi
'/>"/>

Contact: Vikas Berry
vberry@k-state.edu
785-532-5519
Kansas State University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Researchers reveal new more precise method of performing electroconvulsive therapy
2. Researchers calculate the global highways of invasive marine species
3. University of Maryland School of Medicine researchers find potential novel treatment for influenza
4. Researchers pinpoint upper safe limit of vitamin D blood levels
5. Researchers track singing humpback whales on a Northwest Atlantic feeding ground
6. Huddersfield researchers publish a book exploring the link between evolution and criminal behavior
7. Researchers pinpoint how trees play role in smog production
8. CNIO researchers capture the replication of the human genome for the first time
9. Researchers abuzz over caffeine as cancer-cell killer
10. An important discovery in breast cancer by IRCM researchers
11. UCLA researchers find nanodiamonds could improve effectiveness of breast cancer treatment
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/17/2014)... Dec. 16, 2014 Research and Markets ... of the "Global Chemical Sensor Market 2015-2019" ... http://photos.prnewswire.com/prnh/20130307/600769 One major ... demand for medical sensors in biomedical applications. Chemical ... quick and correct diagnosis during surgical procedures. The ...
(Date:12/15/2014)... Dec. 12, 2014 Research and Markets ... of the "Global Facial Recognition Market 2015-2019" ... http://photos.prnewswire.com/prnh/20130307/600769 Facial recognition ... individuals. Facial recognition system measures the overall facial ... edges, mouth, and the distance between eyes. Facial ...
(Date:12/11/2014)... 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/9ql3kr/biometrics_market ) has announced the addition of ... report to their offering. One ... adoption of multimodal biometric systems. Multimodal biometric systems ... for verification and identification purposes. This helps to ...
Breaking Biology News(10 mins):Global Chemical Sensor Market 2015-2019: Key Vendors are Abbott Laboratories, Bayer, Hoffmann La-Roche, Johnson & Johnson, NGK Spark Plugs and Robert Bosch 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 3Biometrics Market in India 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... are spiritual, according to new research from Rice University. Though ... that spirituality is a separate idea one that more ... The research will be published in the June ... in-depth interviews with 275 natural and social scientists at elite ...
... human fungal infections caused by certain strains of Aspergillus ... treatments at an alarming rate, say scientists. University of ... a new test that can not only better diagnose ... resistance to azoles the class of drugs used to ...
... at Sam Houston State University and the University of Texas ... justice system in Houston to establish protocols to determine when ... , "This is a problem-solving project that seeks to determine ... William Wells, who is leading the research project at Sam ...
Cached Biology News:More than 20 percent of atheist scientists are spiritual 2Drug-resistance fears for deadly fungal disease 2Research to target untested rape kits 2Research to target untested rape kits 3
(Date:12/19/2014)... DUBLIN , Dec. 19, 2014 Research ... announced the addition of the "Technology Innovations ... their offering. http://photos.prnewswire.com/prnh/20130307/600769 ... Innovations in Smart Fabrics" offers a detailed assessment ... Key Findings: 1. ...
(Date:12/19/2014)... ME (PRWEB) December 18, 2014 Ed ... director of the Center for Excellence in the Neurosciences ... New England, has been selected as a member of ... is the first neuroscientist from Maine to receive this ... nonprofit organization supported entirely by the Dana Foundation. ...
(Date:12/19/2014)... The empty capsules market is experiencing ... and technological innovations in the empty capsules market. ... the growth of the empty capsules market. , ... Scope of Report , The report will enrich ... firms to gauge the pulse of the market ...
(Date:12/19/2014)... 18, 2014   ISN has released its ... Indicators publication series. With data aggregated from ... in 2013 within its online contractor management platform, ISNetworld, ... performance indicator (KPI) statistics. The ... publication is available in two industry specific volumes: ...
Breaking Biology Technology:Technology Innovations in Smart Fabrics (Technical Insights) 2UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 2UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 3Empty Capsules Market Hit to Reach $1,820 Million by 2019 - New Research Report by MarketsandMarkets 2Empty Capsules Market Hit to Reach $1,820 Million by 2019 - New Research Report by MarketsandMarkets 3Empty Capsules Market Hit to Reach $1,820 Million by 2019 - New Research Report by MarketsandMarkets 4ISN Releases Third Edition of US Contractor Health & Safety Performance Indicators Publication Series 2ISN Releases Third Edition of US Contractor Health & Safety Performance Indicators Publication Series 3
... have another chance to strengthen ties with Japan at ... Center. , ,Sponsored by the Japan External Trade ... an inside look into how Wisconsin biotech companies are ... traveled to Japan will talk about the difficulties and ...
... are available 24 hours a day now that a new ... , ,The Web site MusicMadeInMadison.com plays more than ... the Profits, Daedalus Burn, Infinite Helix and They Drive By ... site's goal is to help both the circulation of the ...
... and Human Services Secretary Mike Leavitt announced yesterday that ... will be formed to make recommendations for a nationwide ... , ,This news makes the Digital Healthcare Conference ... 9 at the Fluno Center in Madison, even more ...
Cached Biology Technology:Wisconsin biotechs plan Japan trade mission 2Preview: Electronic health records, tech choices explored at Digital Healthcare Conference 2Preview: Electronic health records, tech choices explored at Digital Healthcare Conference 3
Request Info...
...
...
... purified Formulation: 50mM Tris-HCl, pH ... 0.2mM PMSF, 1mM benzamidine, 0.1% ... PP2A1 (Protein Phosphatase 2A1) partially ... sulfate precipitation, QSepharose,amino-hexyl agarose, Superdex ...
Biology Products: