Navigation Links
3-dimensional view of 1-dimensional nanostructures
Date:1/6/2012

Just 100 nanometers in diameter, nanowires are often considered one-dimensional. But researchers at Northwestern University have recently reported that individual gallium nitride nanowires show strong piezoelectricity a type of charge-generation caused by mechanical stress in three dimensions.

The findings, led by Horacio Espinosa, James N. and Nancy J. Farley Professor in Manufacturing and Entrepreneurship at the McCormick School of Engineering and Applied Science, were published online Dec. 22 in Nano Letters.

Gallium nitride (GaN) is among the most technologically relevant semiconducting materials and is ubiquitous today in optoelectronic elements such as blue lasers (hence the blue-ray disc) and light-emitting-diodes (LEDs). More recently, nanogenerators based on GaN nanowires were demonstrated capable of converting mechanical energy (such as biomechanical motion) to electrical energy.

"Although nanowires are one-dimensional nanostructures, some properties such as piezoelectricity, the linear form of electro-mechanical coupling are three-dimensional in nature," Espinosa said. "We thought these nanowires should show piezoelectricity in 3D, and aimed at obtaining all the piezoelectric constants for individual nanowires, similar to the bulk material."

The findings revealed that individual GaN nanowires as small as 60 nanometers show piezoelectric behavior in 3D up to six times of their bulk counterpart. Since the generated charge scales linearly with piezoelectric constants, this finding implies that nanowires are up to six times more efficient in converting mechanical to electrical energy.

To obtain the measurements, researchers applied an electric field in different directions in single nanowire and measured small displacements, often in pico-meter (10-12 m) range. The group devised a method based on scanning probe microscopy leveraging high-precision displacement measurement capability of an a
'/>"/>

Contact: Megan Fellman
fellman@northwestern.edu
847-491-3115
Northwestern University
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Heated AFM tip allows direct fabrication of ferroelectric nanostructures on plastic
2. Intricate, curving 3-D nanostructures created using capillary action forces
3. High-speed filter uses electrified nanostructures to purify water at low cost
4. New security and medical sensor devices made possible by metallic nanostructures
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
3-dimensional view of 1-dimensional nanostructures
(Date:5/20/2015)... (PRWEB) May 20, 2015 Agricultural firm ... anniversary of its acquisition of Tiger-Sul. Since the ... (Calgary Alberta, Canada) in May 2005, H.J. Baker has ... build it into a comprehensive portfolio of product offerings ... of H.J. Baker and the innovation of Tiger-Sul, transforming ...
(Date:5/20/2015)... May 20, 2015  Haemonetics Corporation (NYSE: HAE ... & CEO, will present at The Jefferies 2015 Global ... on June 1 st , 2015 at 8:30am Eastern ... Concannon,s presentation live via webcast at: http://wsw.com/webcast/jeff88/hae ... HAE ) is a global healthcare company dedicated ...
(Date:5/20/2015)... 2015  Resolution Bioscience announced today the successful results ... TM , a blood-based liquid biopsy for an ALK-gene fusion ... the most common form of this cancer. Researchers or ... to personalized therapies and direct them into clinical trials ... of Health, the CLIA authority in Washington ...
(Date:5/20/2015)... TRIANGLE PARK, North Carolina , ... weltweit führende Unternehmen für klinische Logistik ... Finanzergebnisse für das Geschäftsjahr 2014, das ... und eingereicht. Das Unternehmen hat die ... Logo - http://photos.prnewswire.com/prnh/20110930/NY78064LOGO ...
Breaking Biology Technology:Agricultural Firm H.J. Baker & Bro., Inc., Celebrates 10 Years Since Acquisition Of Tiger-Sul 2Agricultural Firm H.J. Baker & Bro., Inc., Celebrates 10 Years Since Acquisition Of Tiger-Sul 3Resolution Bioscience Receives CLIA Certification for its Diagnostic Laboratory and Launches CLIA-Certified Liquid Biopsy for Lung Cancer 2Marken schließt Ergebnisse für das Geschäftsjahr 2014 ab 2
... Sonia Moralejo Garca at the University of the Basque Country ... and other magnetic devices of wide industrial application. , It ... that are ever smaller and that nanotechnology, although it its ... in our society. Who has not heard of nanotubes, nanoparticles ...
... INCREASE 14.6%. Q4 2007 DILUTED EPS UP 20.8% TO $.64. 2008 ... $2.62 PER SHARE., ST. LOUIS, Feb. 12 , HIGHLIGHTS: ... -- Q4 2007 Sales Set New Quarterly Record: At $532.1 ... high, beating the Q2 2007 record of $507.5 ...
... of Dow AgroSciences Announces Milestone in Wall Street ... ,Dow AgroSciences LLC and Sangamo BioSciences, Inc. (Nasdaq: ... a key research milestone as part of,their joint ... successful application of Sangamo,s zinc finger DNA-binding,protein nuclease ...
Cached Biology Technology:A researcher of UPV/EHU has designed nanomagnets for industry 2Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 2Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 3Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 4Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 5Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 6Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 7Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 8Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 9Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 10Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 11Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 12Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 13Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 14Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 15Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 16Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 17Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 18Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 19Sigma-Aldrich (Nasdaq: SIAL) Annual Sales Surpass $2 Billion Mark. 20Dow AgroSciences, Sangamo BioSciences Announce the Achievement of Key Milestone in Plant Agriculture Collaboration 2Dow AgroSciences, Sangamo BioSciences Announce the Achievement of Key Milestone in Plant Agriculture Collaboration 3Dow AgroSciences, Sangamo BioSciences Announce the Achievement of Key Milestone in Plant Agriculture Collaboration 4
(Date:4/27/2015)... 2015 NXT-ID, Inc. (NASDAQ: NXTD ) ... on the growing mobile commerce market, announces that its ... the first week of May, 2015 and will be ... Gino Pereira , Chief Executive ... company as Wocket® enters the consumer market. We would ...
(Date:4/21/2015)... 2015 High crime rate, ... boosting access control systems market in Saudi ... recently published report by TechSci Research " Saudi Arabia Access ... control systems market in Saudi Arabia ... access control systems market in the Kingdom is growing ...
(Date:4/20/2015)... 2015 The announcement comes as ... Records Management (GRM), Ireland,s foremost records ... Having built up an impressive track record of clients within ... within the records management sector in Dubai ... GCC staffbase and employ a further eight staff members at ...
Breaking Biology News(10 mins):Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 2Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 3Saudi Arabia Access Control Systems Market to Touch USD1.2 Billion by 2020 Says TechSci Research 2Saudi Arabia Access Control Systems Market to Touch USD1.2 Billion by 2020 Says TechSci Research 3Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 2Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 3
... The Fifth Annual AACR Team Science Award will be ... epidemiologists, biostatisticians and clinicians from Fred Hutchinson Cancer Research ... on human papillomavirus (HPV) for more than 20 years. ... for its innovative and meritorious science that has advanced ...
... are capturing attention throughout the country. University of Illinois research ... replace fish meal in weanling pig diets. "The price ... search for new options for weanling pig diets," said Hans ... are traditionally fed diets containing relatively large amounts of animal ...
... BUFFALO, N.Y. -- The University at Buffalo is a ... the origins of all flowers by sequencing the genome of ... nicknamed the "platypus of flowering plants." Amborella is ... place on the planet: the Pacific islands of New Caledonia. ...
Cached Biology News:Research team honored for innovative science to advance cancer research 2Research team honored for innovative science to advance cancer research 3Research proves new soybean meal sources are good fish meal alternatives 2Where did flowers come from? 2Where did flowers come from? 3
QCPN...
... new MALDI O-TOF creates a new category ... orthogonal platform that has been licensed to ... of Manitoba. , As the first single ... and collisional cooling, the prOTOF 2000 represents ...
Rat Aortic Endothelial Cells (RAOEC) (>500,000 cells)...
... The miVac Duo is suitable for ... from volatile organic solvents through to water ... solvents. ,A centrifugal concentrator capable of removing ... of sample formats including tubes, microplates, vials ...
Biology Products: