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:6/30/2015)... Florida (PRWEB) , ... June 30, 2015 , ... ... cannabis digital media company, launched “Cannavoices,” an unprecedented digital video and broadcast ... largest but also the most dynamic collection of legal medical cannabis stories ever ...
(Date:6/29/2015)... 30, 2015   Pharnext SAS today announced that ... the treatment of Charcot-Marie-Tooth Type 1A (CMT1A), is being presented ... Peripheral Nerve Society (PNS) Biennial Meeting at the Quebec Congress ... 27 - July 2, 2015. At Poster Viewing ... 1, 5p.m. to 7p.m. EDT: Poster 23: ...
(Date:6/29/2015)... ... June 29, 2015 , ... The global microfluidics market is ... period (2015 to 2020). The market is mainly driven by the rising geriatric ... R&D. However, lack of adequate healthcare and research infrastructure in emerging markets, dearth ...
(Date:6/29/2015)... WASHINGTON , June 29, 2015  AACC, ... to better health through laboratory medicine, is pleased ... journal, Clinical Chemistry , has increased to ... Reports. This increase places Clinical Chemistry ... and reflects the significant influence of the research ...
Breaking Biology Technology:Cannavoices Launches a Legal Medical Cannabis Documentary Initiative 2Cannavoices Launches a Legal Medical Cannabis Documentary Initiative 3Pharnext's PXT-3003 Featured in Multiple Presentations at 2015 Peripheral Nerve Society Biennial Meeting 2Microfluidics Market Growing at 19.3% CAGR To 2020 – New research available at ReportsnReports.com 2Microfluidics Market Growing at 19.3% CAGR To 2020 – New research available at ReportsnReports.com 3Microfluidics Market Growing at 19.3% CAGR To 2020 – New research available at ReportsnReports.com 4Microfluidics Market Growing at 19.3% CAGR To 2020 – New research available at ReportsnReports.com 5AACC's Journal, Clinical Chemistry, Continues to Have Significant Impact on Medical Testing, Healthcare 2AACC's Journal, Clinical Chemistry, Continues to Have Significant Impact on Medical Testing, Healthcare 3
... scientists at the National Institute of Standards and ... highly efficient piezoelectric material into a silicon microelectromechanical ... advances in sensing, imaging and energy harvesting. ... when fed electricity and, conversely, generates an electric ...
... Modern Mobility Aids, Inc. (OTCBB: MDRM) (the "Company") ... financing required to execute its closing agreement to acquire ... ("LumiGene"). Modern Mobility Aids, Inc. is a ... and development in the Bio-Pharma sector as well as ...
... The question of how many polyhedral nanocrystals of silver ... burning on many lips but the answer holds importance ... plasmonics! Researchers with the U.S. Department of Energy (DOE),s ... the door to a simpler approach for the fabrication ...
Cached Biology Technology:Tiny levers, big moves in piezoelectric sensors 2Modern Mobility Aids, Inc. Secures Financing to Close Acquisition Agreement of LumiGene Technologies 2Modern Mobility Aids, Inc. Secures Financing to Close Acquisition Agreement of LumiGene Technologies 3On the road to plasmonics with silver polyhedral nanocrystals 2On the road to plasmonics with silver polyhedral nanocrystals 3
(Date:6/30/2015)... -- Genisphere announced Tom Bliss ... develop Genisphere,s therapeutics capabilities and portfolio. Mr. Bliss comes ... of the last 25 years in leadership positions at ... & Johnson. Tom started his career in Investment Banking, ... He graduated from Dartmouth College with a BA in ...
(Date:6/25/2015)... PRINCETON, N.J. , June 25, 2015  TAKE ... awarded a patent by the United States Patent and ... Data Standardization". This process leverages TAKE Solutions, Clinical Accelerators ... by over 50% (when compared to standardization without the ... At the heart ...
(Date:6/24/2015)... MARTIGNY, Switzerland , June 24, 2015 /PRNewswire/ ... strategic partnership with emerging biometric password solution one ... http://photos.prnewswire.com/prnh/20150623/225014LOGO one face in, ... offers a ground-breaking and affordable multifactor-authentication biometric answer ... speaker recognition technology, provided in partnership with KeyLemon, ...
Breaking Biology News(10 mins):Genisphere Appoints New CEO, Thomas Bliss 2Genisphere Appoints New CEO, Thomas Bliss 3TAKE Solutions Awarded Patent By USPTO 2KeyLemon Announces Partnership With Biometric Password Solution onefacein 2
... world would help stave off an imminent global extinction ... Proceedings of the National Academy of Sciences ( www.pnas.org ... member organizations of the Alliance for Zero Extinction (AZE ... with imminent extinction, each of which is in need ...
... has its roots in yielding more food to feed more ... , His team's study appears in ... , The team made tomato plants over-express the gene, ... resulted in roots making better use of limited water, said ...
... and the National Human Genome Research Institute (NHGRI), ... (NIH), today launched a comprehensive effort to accelerate ... through the application of genome analysis technologies, especially ... Cancer Genome Atlas (TCGA), will begin with a ...
Cached Biology News:Pretreating rogue cancer cells with aspirin cripples their resistance to targeted therapy 2Anyway you slice it, tomatoes cut through drought with new gene 2NIH launches comprehensive effort to explore cancer genomics 2NIH launches comprehensive effort to explore cancer genomics 3NIH launches comprehensive effort to explore cancer genomics 4