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:9/2/2015)... , Sep. 02, 2015 ... has announced the addition of Jain PharmaBiotech,s new ... Companies" to their offering. This ... development of sequencing technologies, and their applications. Current ... as companies developing them. Various applications of sequencing ...
(Date:9/2/2015)... ... September 02, 2015 , ... The wet form ... of special anti-vascular endothelial growth factor agents given by injection into the eye. ... have a scientific protocol for the many millions diagnosed with it. AMD usually ...
(Date:9/2/2015)... , Sep. 02, 2015 ... addition of Jain PharmaBiotech,s new report "Gene Therapy ... The markets for gene therapy are difficult ... therapy product and it is marketed in ... estimated for the years 2014-2024. The estimates are based ...
(Date:9/2/2015)... 2015 Biovista Inc. is glad ... 2015 BeHEARD science challenge, a global competition hosted by ... access to the latest life science innovations and technologies. ... pathway analytics capability to support Steven Laffoon ... study of Niemann-Pick Disease Type A (NPA), a rare ...
Breaking Biology Technology:Global DNA Sequencing Technologies Report 2015: Profiles of 130 Companies Involved in Sequencing and their 140 Collaborations 2StemCell GeneticMed Announces That It Has Started Stem Cell Treatments for Age Related Dry Macular Degeneration (AMG) 2Global Gene Therapy Market Study 2015-2024 - Technologies, Markets and Companies Analysis 2Biovista Sponsors Wylder Nation Foundation's Research on Acid Sphingomyelinase Deficiency 2
... , ... bj-diagnostik renforce le conseil-client ... ADN de fratrie et de paternité:,Aujourd,hui, les analyses ADN sont ... L,exemple le plus connu est le test de paternité. Mais ...
... ... Greater Control and Increased Accuracy When Managing Complex, Global Clinical Studies , ... Orlando, FL ... Clinical Trial Operations (CTO) software, today launched ClearTrial v3.2, a major upgrade to ...
... crystalline form of carbon, is a potential superstar for ... blaze through the material at nearly the speed of ... through silicon graphene could be used to make ... wire" atomic structure exhibits incredible flexibility and mechanical strength, ...
Cached Biology Technology:bj-diagnostik Renforce le Conseil-client Pour les Tests ADN de Fratrie et de Paternit 2bj-diagnostik Renforce le Conseil-client Pour les Tests ADN de Fratrie et de Paternit 3bj-diagnostik Renforce le Conseil-client Pour les Tests ADN de Fratrie et de Paternit 4ClearTrial Unveils New Product Release at Partnerships in Clinical Trials Conference 2010 2ClearTrial Unveils New Product Release at Partnerships in Clinical Trials Conference 2010 3ClearTrial Unveils New Product Release at Partnerships in Clinical Trials Conference 2010 4Graphene films clear major fabrication hurdle 2Graphene films clear major fabrication hurdle 3
(Date:8/4/2015)... (NASDAQ: AMRI ) today reported financial and operating results for ... , Second quarter contract revenue of $ 85.2 ... Adjusted contract margins of 26 % , ... in EPS from royalties in the current quarter , ... are very pleased to present another strong financial quarter, with all ...
(Date:7/31/2015)... Kina, 31. juli 2015 Den 10. internationale ... af BGI fra den 22. - 25. oktober i ... fejrer sin 10-års fødselsdag i år. Siden starten i ... årlige møder på ,omik,-feltet, og er en af de ... ICG-10 fokuserer på nylige gennembrud og fremskridt inden ...
(Date:7/31/2015)... de julho de 2015 A 10 a. ... será realizada pela BGI de 22-25 de outubro de 2015, ... A conferência está celebrando seu 10 o. aniversário ... se tornou uma das reuniões mais influentes do mundo ... mais dinâmicos, entusiastas e prazerosos. A ...
Breaking Biology News(10 mins):AMRI Announces Second Quarter 2015 Results 2AMRI Announces Second Quarter 2015 Results 3AMRI Announces Second Quarter 2015 Results 4AMRI Announces Second Quarter 2015 Results 5AMRI Announces Second Quarter 2015 Results 6AMRI Announces Second Quarter 2015 Results 7AMRI Announces Second Quarter 2015 Results 8AMRI Announces Second Quarter 2015 Results 9AMRI Announces Second Quarter 2015 Results 10AMRI Announces Second Quarter 2015 Results 11AMRI Announces Second Quarter 2015 Results 12AMRI Announces Second Quarter 2015 Results 13AMRI Announces Second Quarter 2015 Results 14AMRI Announces Second Quarter 2015 Results 15AMRI Announces Second Quarter 2015 Results 16AMRI Announces Second Quarter 2015 Results 17AMRI Announces Second Quarter 2015 Results 18AMRI Announces Second Quarter 2015 Results 19AMRI Announces Second Quarter 2015 Results 20AMRI Announces Second Quarter 2015 Results 21AMRI Announces Second Quarter 2015 Results 22AMRI Announces Second Quarter 2015 Results 23AMRI Announces Second Quarter 2015 Results 24Den 10. internationale konference om Genomics (ICG-10) åbner i oktober 2A 10a. Conferência Internacional sobre Genômica (ICG-10) será em outubro 2A 10a. Conferência Internacional sobre Genômica (ICG-10) será em outubro 3
... ingredientscan transform adult human skin cells into cells that ... early publication of the journal Cell, a publication of ... physical, growth and genetic features typically found in embryonic ... types, including neurons and heart tissue, according to the ...
... MIT researchers have identified a family of proteins key ... normal brain function. Their research could lead to new ... led by MIT biology professor Frank Gertler, found that ... the formation of axons and dendrites, the cellular extensions ...
... President Bush announced on November 16 that the Ecological ... of the 2006 Presidential Award for Excellence in Science, ... only organization to receive the 2006 PAESMEM award; the ... highest of its kind in the United States, is ...
Cached Biology News:Simple recipe turns human skin cells into embryonic stem cell-like cells 2Simple recipe turns human skin cells into embryonic stem cell-like cells 3MIT IDs proteins key to brain function 2ESA honored at White House ceremony 2ESA honored at White House ceremony 3
... kit allows for rapid, convenient, and efficient ... bind/wash/elute process utilizes a spin column to ... for concentration of proteins which were electro-eluted ... strong ion exchangers, offering high binding capacity ...
... Disposable. Virgin, optically clear polystyrene ... and alphanumeric coordinates for cell counting. ... number is a new product number, ... number. If showing no availability yet, ...
... is produced by a patented microwave process ... more consistent, even cell attachment, increased cell ... and growth uunder difficult conditions, including reduced ... provide a more ecominic alternative to expensive ...
... The Bio-Plex suspension array system, 100-240 V, ... of up to 100 proteins and peptides ... is composed of up to 100 color-coded ... conjugated with a unique reactant (enzyme substrates, ...
Biology Products: