Navigation Links
Researchers peer into nanowires to measure dopant properties
Date:4/2/2009

Semiconductor nanowires tiny wires with a diameter as small as a few billionths of a meter hold promise for devices of the future, both in technology like light-emitting diodes and in new versions of transistors and circuits for next generation of electronics. But in order to utilize the novel properties of nanowires, their composition must be precisely controlled, and researchers must better understand just exactly how the composition is determined by the synthesis conditions.

Nanowires are synthesized from elements that form bulk semiconductors, whose electrical properties are in turn controlled by adding minute amounts of impurities called dopants. The amount of dopant determines the conductivity of the nanowire.

But because nanowires are so small with diameters ranging from 3 to 100 nanometers researchers have never been able to see just exactly how much of the dopant gets into the nanowire during synthesis. Now, using a technique called atom probe tomography, Lincoln Lauhon, assistant professor of materials science and engineering at Northwestern University's McCormick School of Engineering and Applied Science, has provided an atomic-level view of the composition of a nanowire. By precisely measuring the amount of dopant in a nanowire, researchers can finally understand the synthesis process on a quantitative level and better predict the electronic properties of nanowire devices.

The results were published online March 29 in the journal Nature Nanotechnology.

"We simply mapped where all the atoms were in a single nanowire, and from the map we determined where the dopant atoms were," he says. "The more dopant atoms you have, the higher the conductivity."

Previously, researchers could not measure the amount of dopant and had to judge the success of the synthesis based on indirect measurements of the conductivity of nanowire devices. That meant that variations in device performance were not readily expl
'/>"/>

Contact: Kyle Delaney
k-delaney@northwestern.edu
847-467-4010
Northwestern University
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Researchers find better way to manufacture fast computer chips
2. Collexis Connects Biomedical Researchers and Clinical Scientists with the Collexis Expert Platform for Translational Research
3. Researchers create catalysts for use in hydrogen storage materials
4. Thomson Reuters Names Hottest Researchers and Papers of 2007-2008
5. Researchers discover a potential on-off switch for nanoelectronics
6. University of Alberta and NINT researchers make solar energy breakthrough
7. Seminar Will Bring ALS Researchers to Patient Groups
8. Researchers at the University of Georgia Discover Protein is Crucial to Reproduction of Parasites Involved in Disease
9. FDA Approves Clinical Studies of a Novel Anti-Cancer Drug Developed by Italian Researchers
10. In Analyst Interview, Cord Blood America Says Stem Cells Now Front and Center for Researchers and Investors
11. Researchers: Molecular forklifts overcome obstacle to smart dust
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/27/2015)... , May 27, 2015  The Companion Diagnostics ... understanding and unprecedented access to the partnering deals ... healthcare companies during 2014. Using these ... into the partnering activities of the past year. ... the partnering and alliances deals announced worldwide.The initial ...
(Date:5/27/2015)... 27, 2015 RXi Pharmaceuticals Corporation (NASDAQ: ... discovering and developing innovative therapies primarily in the ... has commenced a public offering of shares of ... its common stock and overallotment purchase rights to ... of common stock, warrants and overallotment purchase rights ...
(Date:5/27/2015)... , May 26, 2015 ... announced the addition of Jain PharmaBiotech,s new ... and Companies" to their offering. ... molecular diagnostics technologies that will play an ... health, pharmaceutical industry, forensics and biological warfare ...
(Date:5/27/2015)... , May 26, 2015 Research and ... the "Global Breast Cancer Monoclonal Antibodies Market ... Globally, Roche seems to dominate the breast ... Its block buster molecule, Herceptin has been able ... was found that breast cancer cells become recalcitrant ...
Breaking Biology Technology:Companion Diagnostics Deals and Alliances of 2014 2RXi Pharmaceuticals Announces Proposed Public Offering of Common Stock and Warrants 2RXi Pharmaceuticals Announces Proposed Public Offering of Common Stock and Warrants 3Global Molecular Diagnostics Market 2015-2024 - Analysis of Key Technologies, Markets and Companies 2Global Molecular Diagnostics Market 2015-2024 - Analysis of Key Technologies, Markets and Companies 3Global Breast Cancer Monoclonal Antibodies Market Outlook 2020 2Global Breast Cancer Monoclonal Antibodies Market Outlook 2020 3
... July 26 /PRNewswire-FirstCall/ - Oncothyreon Inc. (Nasdaq: ONTY ) will ... Thursday, August 5, 2010 at 4:30 p.m. Eastern time ... , , ... States ) or (707) 287-9361 (International). In addition, the call will be webcast ...
... and TORONTO , July 26 ... testing in clinical research and diagnostics, has acquired Xceed Molecular, ... Breast Cancer Prognostic Assay, and Colon Cancer Xpress chip. The ... of Clinical Chemistry (AACC) annual meeting and Clinical Lab Expo, ...
... SHANGHAI , July 23 /PRNewswire-Asia-FirstCall/ -- China-Biotics, Inc.,("China-Biotics", ... probiotics products in China , today announced,it will host a conference ... 9, 2010 to discuss the fiscal year 2011 first quarter financial ... , , ...
Cached Biology Technology:Axela Acquires Xceed Molecular Creating Powerhouse in Robust and Easy-to-Use Systems for Translational Medicine 2Axela Acquires Xceed Molecular Creating Powerhouse in Robust and Easy-to-Use Systems for Translational Medicine 3Axela Acquires Xceed Molecular Creating Powerhouse in Robust and Easy-to-Use Systems for Translational Medicine 4China-Biotics to Report Fiscal Year 2011 First Quarter Financial Results on August 9 2
(Date:5/27/2015)... , May 27, 2015   ... medication safety systems and image documentation solutions ... of comprehensive, technologically-advanced automation solutions, is pleased ... integration. The Codonics® Safe Label System® (SLS), ... in conjunction with the Omnicell Anesthesia Workstation, ...
(Date:5/26/2015)... May 26, 2015 Research ... addition of the "Saudi Arabia Biometric Systems ... their offering. ,     (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , ,The biometric ... is projected to grow at over 22% ... is attributed to the surging demand for better ...
(Date:5/25/2015)... SYDNEY , May 25, 2015  Australia,s market ... inception stage, although 2014 saw the advent of several ... on 24 April 2015 is expected to ignite interest ... devices in Australia . This in ... the industry and drive new partnerships amongst vendors and ...
Breaking Biology News(10 mins):Codonics and Omnicell Expand Partnership 2Codonics and Omnicell Expand Partnership 3Codonics and Omnicell Expand Partnership 4Saudi Arabia Biometric Systems Market Forecast and Opportunities, 2020 with Morpho Safran, ZK Technlogy, and Suprema Dominating 2Australian wearables market to grow at CAGR of 78%; revenue of A$1 billion by 2018, says Frost & Sullivan 2Australian wearables market to grow at CAGR of 78%; revenue of A$1 billion by 2018, says Frost & Sullivan 3Australian wearables market to grow at CAGR of 78%; revenue of A$1 billion by 2018, says Frost & Sullivan 4
... BioMed Central and Wilfrid Laurier University today announce ... that provides a visible point of open access ... the University community. Built on BioMed ... extensive open access knowledge and technology experience, Laurier ...
... the mice the researchers found alterations which may be closely ... of an international study led by the Leipzig Max Planck ... the current issue of the renowned journal Cell . ... Mnchen have generated and analyzed a mouse model in which ...
... Technology, an award-winning biometric technology research and development ... leader in workforce management solutions, has chosen M2SYS ... solution that seamlessly interfaces with Kronos time and ... fingerprint and finger vein identification, enabling Kronos customers ...
Cached Biology News:'Canadian excellence' strengthened by extensive adoption of open access 2Mouse model provides clues to human language development 2M2SYS Technology to Offer Desktop Biometric Technology to Kronos Customers 2
Glutamate Receptor 5/1a...
Mouse monoclonal [3G8] to MDMA ( Abpromise for all tested applications)....
Fluorescein isothiocyanate (FITC) mouse anti-human IFN-alpha2 50 ug...
Dog polyclonal to Porcine Pancreatic Islets of Langerhans Cells ( Abpromise for all tested applications). Antigen: Tissue / cell preparation (Pig): Sonicated crude membrane fraction of porcine p...
Biology Products: