Navigation Links
Spiraling nanotrees offer new twist on growth of nanowires
Date:5/1/2008

MADISON Since scientists first learned to make nanowires, the nano-sized wires just a few millionths of a centimeter thick have taken many forms, including nanobelts, nanocoils and nanoflowers.

But when University of Wisconsin-Madison chemistry professor Song Jin and graduate student Matthew Bierman accidentally made some pine tree shapes one day complete with tall trunks and branches that tapered in length as they spiraled upward they knew theyd stumbled upon something peculiar.

At the beginning we saw just a couple of trees, and we said, What the heck is going on here? recalls Jin. They were so curious.

Writing in the May 1 edition of Science Express, Jin and his team reveal just how curious the nanotrees truly are. In fact, theyre evidence of an entirely different way of growing nanowires, one that promises to give scientists a powerful means to create new and better nanomaterials for all sorts of applications, including high-performance integrated circuits, biosensors, solar cells, LEDs and lasers.

Until now, most nanowires have been made with metal catalysts, which promote the growth of nanomaterials along one dimension to form long rods. While the branches on Jins trees also elongate in this way, growth of the trunks is driven by a screw dislocation, or defect, in their crystal structure. At the top of the trunk, the defect provides a spiral step for atoms to settle on an otherwise perfect crystal face, causing them stack together in a spiral parking ramp-type structure that quickly lengthens the tip.

Dislocations are fundamental to the growth and characteristics of all crystalline materials, but this is the first time theyve been shown to aid the growth of one-dimensional nanostructures. Engineering these defects, says Jin, may not only allow scientists to create more elaborate nanostructures, but also to investigate the fundamental mechanical, thermal and electronic properties of dislocations in materials.'/>"/>

Contact: Song Jin
jin@chem.wisc.edu
608-262-1562
University of Wisconsin-Madison
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Emisphere Technologies, Inc. Announces Pricing of Registered Direct Offering
2. Roche Extends Tender Offer for Ventana
3. ATS Medical Expands Open Pivot Heart Valve Offerings
4. New 200 mg Vial for Eloxatin(R) (Oxaliplatin Injection) Offers Greater Convenience and Efficiency of Preparation
5. Updated NIH Guidelines Offer Valuable Information on Asthma Diagnosis and Management
6. ARYx Therapeutics, Inc. Files Registration Statement for Initial Public Offering
7. Anacor Files Registration Statement for Initial Public Offering
8. NPS Pharmaceuticals Commences Tender Offer for 3.0% Convertible Notes Due 2008
9. Clinsys Clinical Research, Inc. Announces Key Hires, Rajagopalan Srinivasan, Ph.D, to Strengthen Global Biostatistics Service Offering and Christopher Gregory, Ph.D, to Scientific Affairs
10. Schering-Plough Announces Pricing of Senior Notes Offering
11. Exelixis Announces Closing of Public Offering of Common Stock
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/29/2014)... Antonio, TX (PRWEB) August 29, 2014 ... and ISO 13485:2003 certified, GAMP® 5 compliant imaging ... awarded an international Phase II clinical trial to ... lymphoma. , Throughout this trial, Intrinsic Imaging will ... not limited to, protocol and charter development, site ...
(Date:8/28/2014)... “This kit has an improved extraction efficiency and ... 150 ppb,” said Mark Tess, PhD, Mycotoxin Product Manager for ... owners and USDA-GIPSA inspection agencies that have a need to ... place in a matter of minutes with nothing but our ... feed and grain before accepting it, but they no longer ...
(Date:8/28/2014)... August 28, 2014 The ability for ... culture that will allow individuals to perform at the ... important for employers looking to compete in this post–recession ... embracing this trend, as the sector increasingly focuses on ... company, which will have real results on the organization's ...
(Date:8/28/2014)... Aug. 28, 2014  Armetheon, Inc. ( www.armetheon.com ... mid- to late-stage cardiovascular drug candidates, today announced ... first round of financing. The Series A round ... Bioventures with participation from investors that included Atheneos ... Dr. Larry Hsu , the founder of ...
Breaking Biology Technology:Intrinsic Imaging Awarded Phase II Clinical Trial to Assess New Treatment for Non-Hodgkin’s Lymphoma 2Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 2Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 3Armetheon Completes $7.0 Million Series A Financing 2Armetheon Completes $7.0 Million Series A Financing 3
... China, FORT LAUDERDALE, Fla., Sept. 5 ... pioneer in laser,optical breast cancer imaging systems, has ... Tianjin Medical University,s Cancer Institute and,Hospital, the largest ... http://www.newscom.com/cgi-bin/prnh/20040412/IMDSLOGO ) Research at the Cancer ...
... EDMONTON, Sept. 5 /PRNewswire-FirstCall/ - Biomira Inc. (Nasdaq: ... of three-year survival results,from a randomized Phase II ... lung cancer (NSCLC). The results suggest that Stimuvax,combined ... benefits to,patients with unresectable stage IIIB NSCLC who ...
... FRANCISCO, Calif., Sept. 5 Hyperion,Therapeutics, a biopharmaceutical ... and hepatology therapies for the,treatment of Urea Cycle ... $40 million Series B financing. Leading the round ... Partners and,NEA, all of Menlo Park, CA. WRF ...
Cached Biology Technology:Largest Asian Cancer Hospital to Evaluate New CT Laser Breast Imaging System 2Largest Asian Cancer Hospital to Evaluate New CT Laser Breast Imaging System 3Stimuvax(R) Phase II data highlight three-year survival results for patients with non-small cell lung cancer 2Stimuvax(R) Phase II data highlight three-year survival results for patients with non-small cell lung cancer 3Stimuvax(R) Phase II data highlight three-year survival results for patients with non-small cell lung cancer 4Hyperion Therapeutics Secures $40 Million In Series B Round 2
(Date:8/28/2014)... than traditional cigarettes, but still release toxins into ... USC. , Scientists studying secondhand smoke from e-cigarettes ... harmful particles, with close-to-zero exposure to organic carcinogens. ... in second-hand e-cigarette smoke were found to be ... levels of polycyclic aromatic hydrocarbons cancer-causing organic ...
(Date:8/28/2014)... groups and clinicians is critical to the development ... of Georgia research. , A qualitative study of ... that role models for successful breastfeeding help positively ... "Mothers who received that support are more likely ... Alex Anderson, an associate professor in the College ...
(Date:8/28/2014)... complex systems. Their infrastructure equipment requires ancillary sub-systems ... to supply fuel, and ICT systems for control ... is interconnected with a wider network and they ... scientists has studied various aspects of inter-network dependencies, ... in EPJ B by Gaihua Fu from Newcastle ...
Breaking Biology News(10 mins):Second-hand e-cig smoke compared to regular cigarette smoke 2Breastfeeding study shows need for effective peer counseling programs 2Inter-dependent networks stress test 2
... by Dr. Ann F. Jacobson, associate professor in Kent ... may initially choose to postpone but ultimately undergo total ... patient education before and after the procedure. ... pre-and post operative experiences with total knee replacement surgery, ...
... release is available in Spanish . , A ... (USA) and Nakai (China), among others, have deciphered for the first ... to the cover of the last issue of the prestigious journal ... to the group of Molecular Genetics of the Department of ...
... fund four faculty research projects for spring 2008. ... a number of excellent proposals submitted in response ... for the program is administered by the OSU ... by royalties from OSU-licensed technologies. These funded projects ...
Cached Biology News:Research examines factors in delaying or declining total knee replacement surgery 2Scientists decipher fruit tree genome for the first time 2Scientists decipher fruit tree genome for the first time 3OSU technologies funded for development 2OSU technologies funded for development 3
... Maxi MB (for aqueous, other low volatility ... systems respond to specific applications of molecular ... concentration of heat-labile samples. The RC systems ... cold traps and a wide selection of ...
... Acid Resistant SpeedVac Model SPD131DDA , Our ... SPD131DDA is designed to handle the rigors and ... slim design, digital display, dual independent timers, an ... chamber and vapor pathway. , , Adjustable ...
...
For absolute protein quantification. 4 peptides in 5 vials x 2 nmol per peptide...
Biology Products: