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  

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
(Date:1/15/2014)... Biotechnology Company, Limited ("TaiGen") today announced that they have ... pharmaceutical company, to develop and commercialize nemonoxacin (Taigexyn ® ... Turkey and other members of ... for the treatment of bacterial infections including those caused ...
(Date:1/14/2014)... Carahsoft and CDS Federal Services have ... at 2pm EST (11am PST), “Natural Language Processing: Converting ... how technology can turn raw, heterogeneous data into actionable ... The online webinar will last approximately one hour. , ...
(Date:1/14/2014)... Jan. 14, 2014  3D Communications, a leading provider of strategic communications ... and media events in the United States ... Virginia Cox , JD, is returning to the firm,s ... re-joins 3D after more than two years of service as ...
(Date:1/14/2014)... NY (PRWEB) January 14, 2014 EquitiesIQ, ... Alliqua, Inc. (OTCQB: ALQA). Alliqua is an emerging biomedical ... serve the wound care market. , Free report download: ... restructured with a seasoned management team and Board, which ...
Breaking Biology Technology:TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 4Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2Former FDA Associate Commissioner Returns To 3D Communications 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3
... REDWOOD CITY, Calif., March 4 Maxygen, Inc.,(Nasdaq: ... the development of,improved protein drugs, today announced changes ... president in charge of global,business development and U.S. ... business officer. In addition, the company announced the,pending ...
... new independent non-executive directors added to Board with ... ... appointed independent non-executive Chairman, BRISBANE, Australia, March 4 ... John Lee and Robert Williamson to the Company,s Board as,independent ...
... Biosciences,(Nasdaq: MATK ) announced today that life,sDHA, its ... heart health, is available in new So,Good Omega DHA ... selling soymilk brand. Available in original or vanilla flavor, ... major retailers throughout,Canada., "So Good Omega DHA Soymilk ...
Cached Biology Technology:Maxygen Announces Management Changes 2Progen Expands Board of Directors 2Progen Expands Board of Directors 3Progen Expands Board of Directors 4Canada's Best-Selling Soymilk Now Available with Martek's life'sDHA 2Canada's Best-Selling Soymilk Now Available with Martek's life'sDHA 3
(Date:4/23/2014)... conclusive evidence that the source of a unique rhythmic ... called the "bio-duck," is the Antarctic minke whale ( ... personnel in the 1960s who thought it sounded like ... various locations in the Southern Ocean, but its source ... 2013, an international team of researchers deployed acoustic tags ...
(Date:4/23/2014)... the likelihood of an accurate group decision increases with ... when a collective faces a variety of factors ... University researchers report that smaller groups actually tend to ... excessively focused on only certain pieces of information. , ... known about collective intelligence, or the "wisdom of crowds," ...
(Date:4/23/2014)... The shale gas boom has transformed the energy ... locations, it could cause conflict among the energy ... resources, say researchers. They add that degraded water ... adequate safeguards. The feature article appears in the ... , Meagan S. Mauter and colleagues point out ...
Breaking Biology News(10 mins):Scientists identify source of mysterious sound in the Southern Ocean 2Scientists identify source of mysterious sound in the Southern Ocean 3Too many chefs: Smaller groups exhibit more accurate decision-making 2Too many chefs: Smaller groups exhibit more accurate decision-making 3How to avoid water wars between 'fracking' industry and residents 2
... January 11, 2010 Why do some people like to ... hand, taking the opposite tack by buying insurance to reduce ... Hebrew University of Jerusalem and two Asian universities say the ... team set out to tackle the long-standing question in economic ...
... standards to help ensure the quality and enhance the ... and a variety of functional foods are being proposed ... internationally recognized compendium of quality standards for food ingredients. ... breast milk and commonly added to infant formula, and ...
... Ohio Blocking the function of an enzyme in the ... nerve cells from dying after a stroke, new research suggests. ... that the tocotrienol form of vitamin E, an alternative to ... acids that eventually kill neurons. The Ohio State University ...
Cached Biology News:Why do people 'play the longshot' and buy insurance? It's in our genes 2Quality and safety of infant formulas, functional foods enhanced by new standards 2Quality and safety of infant formulas, functional foods enhanced by new standards 3Study reveals how one form of natural vitamin E protects brain after stroke 2Study reveals how one form of natural vitamin E protects brain after stroke 3