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:1/15/2014)... FALLS, N.Y., Jan. 15, 2014   Niagara Thermal Products ... by Buffalo BioBlower Technologies LLC ("B3") as the critical ... 2 award from the Army Corps of Engineers.  B3 ... kills all biological contaminants and destroys VOCs and other ...
(Date:1/15/2014)... 15, 2014 Cynvenio, a cancer diagnostics ... the genomic analysis of tumor cells in the bloodstream, ... web-based cancer decision support application powered by CollabRx, Inc. ... ClearID™ genomic test, Therapy Finder will provide breast cancer ...
(Date:1/15/2014)... , Jan. 15, 2014 ­ RedBrick Health , ... change technology, today announces that EmblemHealth , the ... wellness company, is now providing the RedBrick Compass health ... program, to all of its members. EmblemHealth is among ...
(Date:1/15/2014)... England , January 15, 2014 A ... win races on the Formula 1 track could help to ... McLaren Applied Technologies (MAT), Stowhealth (a GP surgery based in ... by healthcare provider Simplyhealth. Telemetry technology, which is ...
Breaking Biology Technology:Niagara Thermal Products LLC Selected as Critical Supplier for Buffalo BioBlower Air Purification Systems 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 3EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 2EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 4
... - Two Milestones Reached in Zonisamide Patent Portfolio ... Therapeutics,Inc. (Nasdaq: OREX ), a biopharmaceutical company ... nervous system-related disorders, today,announced the initiation of its ... formulation of zonisamide plus olanzapine.,The Phase 2a clinical ...
... 2 Clarient, Inc.,(Nasdaq: CLRT ), a ... pathologists, oncologists and the pharmaceutical industry,today announced that ... an,exclusive interview on WallSt.net,s 3-Minute Press Show., ... company, and the,significance of the company,s latest press ...
... Zevalin only Radioimmunotherapy in U.S. to be Indicated ... for Use ... Inc. (CTI),(Nasdaq and MTA: CTIC) announced today that it has ... and Drug,Administration (FDA) for use of Zevalin(R) ([90Y]-ibritumomab tiuxetan) as,consolidation ...
Cached Biology Technology:Orexigen(R) Therapeutics Initiates First Clinical Trial of OREX-003 for the Mitigation of Antipsychotic-Associated Weight Gain 2Orexigen(R) Therapeutics Initiates First Clinical Trial of OREX-003 for the Mitigation of Antipsychotic-Associated Weight Gain 3Orexigen(R) Therapeutics Initiates First Clinical Trial of OREX-003 for the Mitigation of Antipsychotic-Associated Weight Gain 4[video] Ronald Andrews, CEO of Clarient, Inc. Discusses Agreement With University of Pennsylvania School of Medicine on WallSt.net's 3-Minute Press Show 2Cell Therapeutics Submits Supplemental Biologics License Application for Zevalin Use in First-Line Consolidation Therapy 2Cell Therapeutics Submits Supplemental Biologics License Application for Zevalin Use in First-Line Consolidation Therapy 3Cell Therapeutics Submits Supplemental Biologics License Application for Zevalin Use in First-Line Consolidation Therapy 4Cell Therapeutics Submits Supplemental Biologics License Application for Zevalin Use in First-Line Consolidation Therapy 5
(Date:4/23/2014)... Valley, NY. (Apr. 23, 2014) People who have ... potential to restore neurological function. However, a study conducted ... issue of Cell Transplantation , but is currently ... http://www.ingentaconnect.com/content/cog/ct/pre-prints/content-ct1168Chen , has found that when one group ... cells (PBSCs) injected directly into the brain and a ...
(Date:4/23/2014)... transformed the energy landscape in the U.S., but ... among the energy industry, residents and agricultural interests ... that degraded water quality is a potential risk ... appears in the ACS journal Environmental Science ... colleagues point out that a major criticism of ...
(Date:4/23/2014)... term for novels and films which focus on the consequences ... how these fictions serve as a mental laboratory that allows ... imagine other living conditions. , "Global warming is much ... is also a cultural phenomenon in which meaning is being ... see. And there are so many of them now that ...
Breaking Biology News(10 mins):Autologous stem cell therapy improves motor function in chronic stroke victims 2How to avoid water wars between 'fracking' industry and residents 2Fiction prepares us for a world changed by global warming 2Fiction prepares us for a world changed by global warming 3
... may begin in the womb, researchers from Tel Aviv University ... twin can compromise the health of his twin sister before ... published in the journal Pediatrics, the researchers analyzed the incidence ... twins. When born premature, girls who share the womb with ...
... A recent University of Iowa study reveals a biological link ... women than men are diagnosed with chronic pain and fatigue ... mice, the researchers, led by Kathleen Sluka, Ph.D., professor in ... the UI Roy J. and Lucille A. Carver College of ...
... 2008 The Global Innovation Imperatives (Gii) project ... their first session at the American Chemical Societys ... a joint collaboration between the ACS Committee on ... seeks to combat worldwide health, environmental and societal ...
Cached Biology News:War between the sexes begins before twins' birth, TAU researchers say 2U. Iowa study finds biological link between pain and fatigue 2At ACS' national meeting, global initiative set to tackle water issues 2
Request Info...
... blotted protein on PVDF membrane or with ... N-terminal sequence of proteins (5-20 residues) can ... HPLC or mono-and bidimensional SDS-PAGE, followed by ... the well known EDMAN degradation method. Pre-treatment ...
Mycoplasma Removal Agent (MRA) has been developed for cell culture, to combat the widespread problems caused by contamination of cell cultures with mycoplasma....
... 5 ml Dynabeads® (4.5 ... BerEP4 against the human epithelial ... molecule). Also available in ... 10e7 MNC in 1 ml ...
Biology Products: