Navigation Links
Penn research advances understanding of lead selenide nanowires
Date:4/8/2011

PHILADELPHIA The advancements of our electronic age rests on our ability to control how electric charge moves, from point A to point B, through circuitry. Doing so requires particular precision, for applications ranging from computers, image sensors and solar cells, and that task falls to semiconductors.

Now, a research team at the University of Pennsylvania's schools of Engineering and Applied Science and Arts and Sciences has shown how to control the characteristics of semiconductor nanowires made of a promising material: lead selenide.

Led by Cherie Kagan, professor in the departments of Electrical and Systems Engineering, Materials Science and Engineering and Chemistry and co-director of Pennergy, Penn's center focused on developing alternative energy technologies, the team's research was primarily conducted by David Kim, a graduate student in the Materials Science and Engineering program.

The team's work was published online in the journal ACS Nano and will be featured in the Journal's April podcast.

The key contribution of the team's work has to do with controlling the conductive properties of lead selenide nanowires in circuitry. Semiconductors come in two types, n and p, referring to the negative or positive charge they can carry. The ones that move electrons, which have a negative charge, are called "n-type." Their "p-type" counterparts don't move protons but rather the absence of an electron a "hole" which is the equivalent of moving a positive charge.

Before they are integrated into circuitry, the semiconductor nanowire must be "wired up" into a device. Metal electrodes must be placed on both ends to allow electricity to flow in and out; however, the "wiring" may influence the observed electrical characteristics of the nanowires, whether the device appears to be n-type or p-type. Contamination, even from air, can also influence the device type. Through rigorous air-free synthesis, purificatio
'/>"/>

Contact: Evan Lerner
elerner@upenn.edu
215-573-6604
University of Pennsylvania
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Zacharon Pharmaceuticals Announces Research and Development Collaboration With Pfizer to Develop Drugs for Multiple Rare Disorders
2. Caliper Announces New Oncology Research Collaboration
3. Nanocrystal doping developed by Hebrew University researchers enhances semiconductor nanocrystals
4. Generex Announces Publication of Comparative Peptide Vaccine Studies in Peer Review Journal Demonstrating Superiority of AE37 and Presentation at the American Association for Cancer Research
5. New Research Holds Promise for Gene Engineering and Therapy
6. TGen and Scottsdale Healthcare researchers discover microRNA role in brain metastasis
7. Transgenomic, Inc. Presentations to Describe High-Sensitivity Detection of Cancer Biomarkers at the 2011 American Association for Cancer Research Meeting
8. Carnegie Mellon researchers electrify polymerization
9. LasikPlus® Research Reveals Excellent Results From Modern LASIK
10. Stanford researchers use river water and salty ocean water to generate electricity
11. Marshall Edwards to Report new Data on Mitochondrial Inhibitor Program at American Association for Cancer Research Annual Meeting
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/5/2015)... 05, 2015 A comment period was ... range of key photonics technologies – regulations that some ... U.S. industry. To help the community understand and comment, ... on the proposed changes to U.S. Munitions List ... International Traffic in Arms Regulations (ITAR). , For the ...
(Date:5/5/2015)... DUBLIN , May 05, 2015 Research ... announced the addition of the "Clinical Laboratory, ... and Forecast 2015 to 2019 - Global Version" ... technical developments especially in the area of molecular ... dynamic, growing and evolving world market that is ...
(Date:5/5/2015)... 2015 CytomX, a biotechnology company developing Probody™ ... Sean McCarthy , D. Phil., chief executive officer, ... New York at 1:15 p.m. ... an overview of CytomX,s Probody pipeline, including the company,s ... About CytomX Therapeutics CytomX Therapeutics develops Probody™ ...
(Date:5/5/2015)... 5, 2015   Tocagen Inc. , a ... R. Parkinson , M.D., a venture partner at ... the board of directors of Tocagen. Dr. Parkinson ... oncology clinical development, including leading clinical activities at ... of the cancer therapeutics Gleevec®, Femara®, Zometa®, Kepivance® ...
Breaking Biology Technology:Comments needed now from photonics industry on revisions of U.S. export rules 2Comments needed now from photonics industry on revisions of U.S. export rules 3Comments needed now from photonics industry on revisions of U.S. export rules 4Global Clinical Laboratory, Molecular Diagnostics and Genomic Testing Services Market Trends and Forecast 2015 to 2019 2Tocagen Appoints David R. Parkinson, M.D., to the Board of Directors 2Tocagen Appoints David R. Parkinson, M.D., to the Board of Directors 3Tocagen Appoints David R. Parkinson, M.D., to the Board of Directors 4
... - Researchers and engineers across Wisconsin are ... manure, wood chips, organic sugars, soybeans, solar collectors, ... mills, and much more. , ,State businesses, architects, ... constructing green buildings that save energy and money. ...
... Wis. and Santa Monica, Calif. - The United ... three stem cell patents held by the Wisconsin Alumni ... of the patents as the legal process continues to unfold. ... cells, and the claim to stem cells, themselves, has been ...
... at passing statewide bills that will give AT&T ... put in Project Lightspeed or U-verse without having to negotiate ... HB 1500 in Illinois. Have a statewide franchise. But in ... that every business and household has a network connection of ...
Cached Biology Technology:Wisconsin can offer what a federal energy research lab needs 2Wisconsin can offer what a federal energy research lab needs 3Wisconsin can offer what a federal energy research lab needs 4Patent office upholds challenge to WARF stem cell patents 2Patent office upholds challenge to WARF stem cell patents 3Proposed telecom bill would have Katrina impact 2Proposed telecom bill would have Katrina impact 3Proposed telecom bill would have Katrina impact 4Proposed telecom bill would have Katrina impact 5
(Date:5/5/2015)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or ... mobile commerce market, reminds investors and media that  Mr. ...  at CARTES SECURE CONNEXIONS AMERICA 2015, held in ... The three-day conference is organized into a series of nine ... Global Fraud: Where is the Trust in Cyberspace? ...
(Date:4/27/2015)... , April 27, 2015  For more than ... trade show has been the premier worldwide event for ... 2015 is a must-attend event for any local, national, ... into the emerging commercial markets and current applications of ... innovations of this projected $48 billion industry, and how ...
(Date:4/27/2015)... Apr. 27, 2015 NXT-ID, Inc. (NASDAQ: ... company focused on the growing mobile commerce market, announces ... pre-order customers the first week of May, 2015 and ... of May. Gino Pereira , ... for the company as Wocket® enters the consumer market. ...
Breaking Biology News(10 mins):NXT-ID, Inc.'s CTO, David Tunnell, Presents at CARTES SECURE CONNEXIONS AMERICA 2015 Today in Washington DC. 2NXT-ID, Inc.'s CTO, David Tunnell, Presents at CARTES SECURE CONNEXIONS AMERICA 2015 Today in Washington DC. 3UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 2UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 3UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 4UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 5Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 2Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 3
... University of Maryland biologists have identified how changes ... evolution of the Mexican blind cavefish ( Astyanax ... research published in the August 12, 2010 online ... Jeffery, together with postdoctoral associates Masato Yoshizawa, and ...
... high presence of microRNA 451 enhances the response to ... with stomach cancer", explained Dr. Jess Garca-Foncillas, chief researcher ... Centre (CIMA) and Director of Oncology at the University ... presented at the IV Congress of the Spanish Society ...
... for the first time estimated the physical footprint of human ... The findings published in the journal PLoS ONE ... fleets exceeds the combined physical footprint of other major human ... of Earth,s surface, but only a tiny fraction of it ...
Cached Biology News:Adapting to darkness: How behavioral and genetic changes helped cavefish survive extreme environment 2Adapting to darkness: How behavioral and genetic changes helped cavefish survive extreme environment 3Molecule identified that increases survival of stomach cancer patients 2Human impacts on the deep seafloor 2
... Staining Kit is uniquely formulated to ... minimal protein modification for optimal mass ... associated with traditional silver stains are ... the reagents used do not modify ...
...
... Davison and Richard M. ... include: information on positive ... influenza and immunodeficiency viruses. ... of viral NA replication ...
Performance, mycoplasma, virus, and endotoxin tested. Collected from calves 14 days old or less...
Biology Products: