Navigation Links
'High Q' NIST nanowires may be practical oscillators
Date:11/27/2007

Nanowires grown at the National Institute of Standards and Technology (NIST) have a mechanical quality factor at least 10 times higher than reported values for other nanoscale devices such as carbon nanotubes, and comparable to that of commercial quartz crystals. Because a high Q factor indicates a capacity for stable vibrations, the nanowires might be used as oscillators in nano-electromechanical systems for future nano-sensors and communications devices.

We think the most interesting thing about these wires is the very high quality factor observed for such a small object, says NIST researcher and co-author Kris Bertness, who grew the nanowires.

NIST has developed a unique way of growing hexagonal gallium nitride (GaN) nanowires featuring low defect density and high luminescence intensity. In a new paper*, researchers at NIST and the University of Colorado at Boulder report high Q factors in wires that are 30 to 500 nanometers in diameter and 5 to 20 micrometers long, vibrating between 400,000 and 2.8 million times per second. (For comparison, the quartz crystals used in watches usually vibrate about 32,000 times a second.) The nanowires vibrated when placed on a piezoelectric device stimulated by an electrical signal. The nanowires also oscillated when excited directly by an electron beam, apparently due to the GaN materials intrinsic piezoelectric ability to covert voltage to mechanical force.

Q measures the damping of oscillations in a mechanical system as a function of frequencythe higher its Q, the longer a bell rings after being struck. Ordinarily, Q factors of mechanical resonators tend to drop as their diameters shrink. But GaN nanowires have a number of properties that may boost their Q and make them suitable as practical oscillators. They have extremely flat and smooth surfaces (irregularities have reduced performance in other oscillators.) GaN also has a resonant frequency similar to silicon (commonly used in microelec
'/>"/>

Contact: Laura Ost
laura.ost@nist.gov
303-497-4880
National Institute of Standards and Technology (NIST)  
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Dendreon Announces Publication of Phase 1 Study Highlighting Immunologic and Clinical Activity of Lapuleucel-T (Neuvenge(R)) in Advanced Breast Cancer Patients
2. Pharmatek Adds Cytotoxic and High-Potent Drug Development Capabilities to San Diego Laboratory
3. ImmuneRegen BioSciences Files 8-K that Highlights Enclosed Shareholder Letter Discussing Recent Achievements and Outlook
4. KAPE to Honor High-Performing Pennsylvania Organizations
5. SportCoatings; The North American Booster Club Association (NABCA); the Coatings Specialist Group New Booster Program Goes High Tech With Invisible Antimicrobial Defense
6. Safety Profile of TAXUS(R) Liberte(TM) Stent System Highlighted in Worlds Largest Stent Registry
7. New Survey Reveals Many Adults With High Cholesterol Fail to Take Necessary Steps to Improve Their Condition
8. Stimuvax(R) Phase II data highlight three-year survival results for patients with non-small cell lung cancer
9. Three Studies by Independent Scientists Highlighting Pressure Cycling Technology (PCT) to be Presented this Week at the British Mass Spectrometry Societys 29th Annual Meeting
10. Access Highlighted in Recent BusinessWeek Article
11. Caliper Life Sciences Introduces High Throughput RNA Assay to Improve Workflow in Gene Expression Studies
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
'High Q' NIST nanowires may be practical oscillators
(Date:12/19/2014)... December 18, 2014 LayerBio is an ... and wound care. The National Eye Institute (NEI) at ... a Phase I SBIR grant to develop a drug-eluting ... the most common cause of vision loss in people ... worldwide. According to Dr. Ken Mandell, LayerBio’s Founder and ...
(Date:12/19/2014)... 2014 The empty capsules market ... ageing population and technological innovations in the empty ... are catalysing the growth of the empty capsules ... , Scope of Report , The report ... new entrants/smaller firms to gauge the pulse of ...
(Date:12/19/2014)... , Dec. 18, 2014 Relmada Therapeutics, Inc. ... the treatment of chronic pain, announced the results of ... "This was a transformational year in Relmada,s history ... for our company," said Sergio Traversa , chief ... have executed on key financial, human resource and clinical ...
(Date:12/17/2014)... N.J. (PRWEB) December 17, 2014 ... (Euronext: IPN; ADR: IPSEY), today announced ... (referred to as Somatuline®) was approved by the ... treatment of gastroenteropancreatic neuroendocrine tumors (GEP-NETs) in adult ... advanced or metastatic disease to improve progression-free survival ...
Breaking Biology Technology:LayerBio Awarded NIH Grant to Develop a Drug Delivery Device for Cataract Surgery 2Empty Capsules Market Hit to Reach $1,820 Million by 2019 - New Research Report by MarketsandMarkets 2Empty Capsules Market Hit to Reach $1,820 Million by 2019 - New Research Report by MarketsandMarkets 3Empty Capsules Market Hit to Reach $1,820 Million by 2019 - New Research Report by MarketsandMarkets 4Relmada Therapeutics Announces Results of Annual Shareholders Meeting 2Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 2Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 3Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 4Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 5Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 6Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 7Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 8
... May 12 /PRNewswire/ - Cytochroma today announced that ... Chief Financial Officer (CFO).,Mr. Wieland, 63, brings to ... financial management, at both public and private companies, ... "Rich has strong leadership skills, extensive experience managing,finance ...
... Lasers that emit ultrashort pulses of light are ... eye surgery, spectroscopy and controlling chemical reactions. But ... distortions caused by lenses and other optical components ... , To better understand the distortions, researchers at ...
... On Diagnostic Products and Target Validation, ... announced today,that SomaLogic and Otsuka Pharmaceutical Co., ... SomaLogic,s proprietary aptamer technology,to discover and develop ... that will enhance Otsuka,s pharmaceutical discovery and ...
Cached Biology Technology:Cytochroma Appoints R. Richard Wieland II As CFO 2New technique measures ultrashort laser pulses at focus 2New technique measures ultrashort laser pulses at focus 3SomaLogic and Otsuka Enter Into Research Collaboration 2SomaLogic and Otsuka Enter Into Research Collaboration 3
(Date:12/17/2014)... 15, 2014 Research and Markets ... the "Samsung Galaxy S5 - Home Button ... their offering. http://photos.prnewswire.com/prnh/20130307/600769 ... sensing technology than the iPhone 5S, Samsung introduces ... its product. The Galaxy S5 home ...
(Date:12/17/2014)... DENVER , Dec. 16, 2014  Automation ... is this more evident than at international borders. ... secure document scanners have allowed veteran travelers to ... Automated Passport Control (APC) Kiosks at an increasing ... the globe. According to ...
(Date:12/11/2014)... Minn. , Dec. 10, 2014  Data ... physiologic monitoring, has released a new series of ... of preclinical toxicology researchers. M series, part of ... toxicologists collect the best possible physiologic data when ... Adding functional endpoints to toxicology studies has ...
Breaking Biology News(10 mins):Samsung Galaxy S5 - Home Button Synaptics Fingerprint Sensor Technology Analysis 2Automated Border Control (ABC) Transforms the Global Travel Experience With More Than 2500 ABC eGates and APC Kiosks Deployed In Airports, Seaports, and Land Borders Worldwide 2New telemetry implants expected to change how large animal toxicology studies are conducted 2
... led by a Michigan State University professor has discovered a link ... one of the disease,s most common and potentially blindness-causing complications. ... vessels in the retina that affects up to 80 percent of ... to the nerves found in bone marrow that leads to the ...
... beetle, a pest that feasts on corn roots and corn ... the U.S., also can survive on the perennial grass ... likely be grown alongside corn, researchers report. Rootworm beetle ... and adult beetles will lay their eggs at the base ...
... COLD SPRING HARBOR, N.Y. (Jan. 5, 2010) ... proteomics have dramatically increased the need for quantitative reasoning ... the most routine informatics tools rely on statistical assumptions ... scientific results are to be correct, understood, and exploited ...
Cached Biology News:MSU researcher links diabetic complication, nerve damage in bone marrow 2Miscanthus, a biofuels crop, can host western corn rootworm 2Miscanthus, a biofuels crop, can host western corn rootworm 3New handbook for biologists who need more competence or confidence in statistics 2
... DALTsix Gradient Maker, 1. Modular system ... 2-D electrophoresis.Run up to six lab-cast ... cm) simultaneously.Use with 18- or 24-cm ... pre-assembled hinged gel cassettes.Innovative design simplifies ...
Mycoplasma Removal Agent (MRA) has been developed for cell culture, to combat the widespread problems caused by contamination of cell cultures with mycoplasma....
albumin from bovine serum (BSA), 2,4-dinitrophenylated (DNP-BSA)...
Request Info...
Biology Products: