Navigation Links
Chemists measure copper levels in zinc oxide nanowires
Date:2/19/2008

Chemists at the National Institute of Standards and Technology (NIST) have been the first to measure significant amounts of copper incorporated into zinc oxide (ZnO) nanowires during fabrication. The issue is important because copper plays a significantbut not well-understoodrole in important optical and electrical properties of the nanowires. Previous experiments found only trace amounts of copper.

Although zinc oxide is best known as a strong sunblock, cold remedy, itch reliever and paint pigment, nanotech engineers like it for its photoluminescence (the ability to emit light after absorbing electromagnetic radiation), field emission (the basis for advanced, high-definition flat-panel displays) and piezoelectric properties (stressing or changing shape when electricity is applied and producing electricity when stressed). ZnO nanomaterials may one day be used to improve solar cells, lasers, sensors, ultraviolet light sources, field emission sources and piezoelectric devices.

Copper enters the ZnO nanowires during fabrication. The nanowiresabout 50 to 150 nanometers wide and up to 40 micrometers longare grown on a copper substrate using a chemical vapor deposition process. The copper substrate forms droplets that absorb the zinc and oxygen vapors and deposits the ZnO on the substrate. As the nanowire grows, the zinc pushes the droplets up from the surface, but some copper remains inside the nanowires crystal lattice.

In a new paper,* NIST chemists report using a variety of measurement techniques to learn that the ZnO wires contain a surprising amount of copperbetween 5 and 15 percent. High-resolution imaging studies of ZnO nanowires reveal that the copper manages to fit into zinc oxides regular crystalline structure without disrupting it. It is in there somewhere, explains chemist Susie Eustis. Because the copper can be easily detected when you know what to look for, she says, researchers plan to use it to better unde
'/>"/>

Contact: Evelyn Brown
evelyn.brown@nist.gov
301-975-5661
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

0

GOOD

Page: 1 2

Related biology technology :

1. APIC Statement on Need for Increased Prevention Measures for Healthcare-Associated Infections (HAIs)
2. SoluLinK Introduces ChromaLink(TM) Biotin Labeling Kit to Biotinylate and Measure With One Reagent
3. Pathway Diagnostics Announces Patent Issuance for the Diagnostic Measurement of HIV Tropism for the Initiation or Modification of HIV Therapy
4. Researchers measure carbon nanotube interaction
5. New force-fluorescence device measures motion previously undetectable
6. Phase 1 Studies Show Promise of QuatRxs Novel Compound, Sobetirome, for Lowering LDL Cholesterol Levels
7. House and Senate Pass Medicare Legislation to Freeze 2008 Reimbursement for Therapeutic Radiopharmaceuticals at 2007 Levels
8. The International Diabetes Federation (IDF) Recommends Tighter Control of Blood Glucose Levels After Meals in People With Diabetes
9. National Association of Emergency Medical Technicians (NAEMT) Supports Prehospital Screening for Carbon Monoxide in the Blood
10. International Association of Fire Fighters (IAFF) Advocates Screening Fire Fighters for Carbon Monoxide Poisoning Using Pulse CO-Oximetry
11. High Q NIST nanowires may be practical oscillators
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Chemists measure copper levels in zinc oxide nanowires
Chemists measure copper levels in zinc oxide nanowires
(Date:12/4/2008)...wswire-FirstCall/ -- Imaging Diagnostic,Systems, ...er optical breast,imaging, announced today that a...ct to mammography is featured in the December 2008...ttp://www.newscom.com/cgi-bin/prnh/20040412/IMDSLO... at Charite Hospital in Berlin,Germany, authored...
(Date:12/4/2008)...re-FirstCall/ -- Raymond J. De Hont, Chairman and ...SE: MPR ), announced today that the Company,s Boa...008, declared a quarterly dividend of $0.06 per sh...ecord at the close of business on February 26, 200...the same period last year. , , This is the ...
(Date:12/4/2008)...Azur Pharma Limited ("Azur") today,announced that...ioSante,Pharmaceuticals, Inc ("BioSante")(Nasdaq:... Elestrin is a fast drying gel formulation of estr...erate to severe vasomotor symptoms,associated wit...d and Drug,Administration ("FDA") in December 200...
(Date:12/4/2008)... Peregrine Pharmaceutic...t will release its financial results for the secon... at 7:00 a.m. EST and will host a conference call ...ST on the same day. , , Peregrine,s senior... second quarter ended October 31, 2008 and will re...
Breaking Biology Technology:Imaging Diagnostic Systems CT Laser Mammography (CTLM) Technology Featured in Peer-Reviewed Journal 2Met-Pro Corporation Declares Quarterly Dividend 2Azur Pharma Ltd. Enters Into Definitive Agreement With BioSante Pharmaceuticals Inc [nasdaq: BPAX], to Acquire U.S. Rights to Elestrin (TM) 2Peregrine Pharmaceuticals to Report Second Quarter FY 2009 Financial Results 2
... CHICAGO People are more skeptical of advertisin...greed, and the growing presence of the Internet al...eputation. The result? More power in the hands of ...ch their brandsand their backs. , ,Several present...ggested companies need to focus more on maintainin...
...he United States Court of Appeals for the Ninth C...oy Enterprises, Inc. v. Netscape Communications Co...current standard for evaluating trademark infringe... "keying," which is the practice of linking advert...ords. For instance, a person who searches a term r...
...Because a rainbow arches from its HQ all the way t...sgraced energy giant sheds its old image of ENWRON...es, the company is restructured under the new iden...o prison. The PRISMA Corporation is on a short l...s units, a big drop from the 2400 business entitie...
... Source: Fisher Paykel This past weekend, I had ...off and on, mind you, but a hard reboot. I pulled ..., then plugged this so-called state-of-the-art clo...ng lights, a trill of beeps, and voil: I was back ...nking just how complicated ordinary machines have ...
Other Biology Technology:AD:TECH: Advertisers face harsh lessons at the hands of powerful consumers 2AD:TECH: Advertisers face harsh lessons at the hands of powerful consumers 3AD:TECH: Advertisers face harsh lessons at the hands of powerful consumers 4Recent developments in the protection of trademarks on the Internet 2Recent developments in the protection of trademarks on the Internet 3Why is Enron now called Prisma? 2Why is Enron now called Prisma? 3Have you rebooted? 2Have you rebooted? 3Have you rebooted? 4
(Date:12/4/2008)...is associated with higher levels of omega-3 fatty ...ajor finding of the European study IMMIDIET that w...ican Journal of Clinical Nutriti on, an official p...nd is already available on line ( www.ajcn.org )....er alcoholic drinks. This effect could be ascribed...
(Date:12/3/2008)...wire-FirstCall/ -- BIO-key International, Inc.,(O... biometric identification,and wireless public saf...emark,Office has approved the issuance of a paten...thin a Biometric Security System" method. , ...patent (patent number,7,454,624) provide another ...
(Date:12/3/2008)...r 3, 2008. The first 5-year forest inventory repor...ilable to the public: Oregon,s Forest Resources, 2...Report. , Here are some key findings from the re... acres; about half of Oregon,s total land area of ...d to other uses particularly near urban areas. The...
(Date:12/3/2008)... 2008 -- As the United States continues to develop...y independence, cellulosic-based ethanol has emerg...gies. Corn stover remains the most popular source ...C) associated with the removal of corn fodder as a...nd environmental concern. , In the November-De...
Breaking Biology News(10 mins):A little wine boosts omega-3 in the body: Researchers find a novel mechanism for a healthier heart 2A little wine boosts omega-3 in the body: Researchers find a novel mechanism for a healthier heart 3BIO-key(R) Granted Patent to Secure Biometric Enrollments From Unauthorized Use 2Forest inventories in Oregon include more than trees 2Forest inventories in Oregon include more than trees 3Managing carbon loss 2Chemotherapy with gemcitabine delays progression of operable pancreatic cancer 2181 1Chemotherapy with gemcitabine delays progression of operable pancreatic cancer 2181 2Sanofi Aventis renews licenses for Genomatix chip analysis pipeline 2177 1First European IGRT School Takes Place for Radiotherapy Practitioners in UK 886 1First European IGRT School Takes Place for Radiotherapy Practitioners in UK 886 2First European IGRT School Takes Place for Radiotherapy Practitioners in UK 886 3Kaiser Permanente study 3A Alcohol amount not type wine beer liquor triggers breast cancer 2171 1Kaiser Permanente study 3A Alcohol amount not type wine beer liquor triggers breast cancer 2171 2Kaiser Permanente study 3A Alcohol amount not type wine beer liquor triggers breast cancer 2171 3
... research team led by scientists at the Broad Inst...opment of a new kind of genetic "roadmap" that can...eat them, as well as predict how new drugs work in...ew tool and its uses are described in the Septembe... in the September 28 immediate early edition of Ca...
...iabetes is a growing health problem. Giving antiox...with diabetes to control their blood sugar levels....e Milk Thistle, Silybum marianum (silymarin) is kn...blished this week in Phytotherapy Research shows t...er the amount of sugar bound to haemoglobin in blo...
...uke University engineers have shown that a three-d...uccessfully guide a surgical robot. , The scanner ..., according to the researchers. They said the scan...med without surgeons, a capability that could prov...ions. , "It,s the first time, to our knowledge, ...
... new study that takes a rare look at the physiolog...experiences in real-life settings shows that when ... they have elevated levels of cortisol shortly aft...ortisol -- a stress hormone linked to depression, ...actually cue the body on a day-to-day basis that i...
Other Biology News:Genetic 'roadmap' charts links between drugs and human disease 2Genetic 'roadmap' charts links between drugs and human disease 33-D ultrasound scanner could guide robotic surgeries 23-D ultrasound scanner could guide robotic surgeries 3Adults who go to bed lonely get stress hormone boost next morning 2Adults who go to bed lonely get stress hormone boost next morning 3
One controller two vessel system suitable for early stage of fermentation, and small scale, Application : cultivation of microorganisms and human or animal cells
These handy dispensers save space and organize gloves, safety glasses, wipers, hats, and other garb. They are the perfect benchtop storage bins for small parts used in labs, processing and manufactur
...uble staining is a technique used to reveal two di...8482;-Double Staining Kit is a Zymed polymer doubl...gens simultaneously in the same human cell or tiss... can be identified using two different primary ant...
...e FLUOstar OPTIMA is a fully automated microplate ...e labs in academia and industry. The FLUOstar inco...luorescence Intensity including FRET and multilab...ding DELFIATM High-Performance Luminescence (flas...
Biology Products: