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:7/24/2014)... 2014  Asterias Biotherapeutics, Inc. (OTCBB: ASTYV), a ... regenerative medicine, announced today that it will host ... on Tuesday, July 29, 2014, at 4:30 p.m. ... an overview of Asterias, business strategy and product ... http://www.ustream.tv/channel/asterias-biotherapeutics at least 15 minutes before the ...
(Date:7/24/2014)... computers have yet to materialise. Yet, scientists are ... such computers faster. One such approach relies on ... by applying an electric field. A new study ... coupled quantum dots (TQDs) with electrical impulses can ... example, should TQDs be used as quantum information ...
(Date:7/24/2014)... Research and Markets has announced the addition ... Market 2014-2018" report to their offering. ... the study of the gene and its functions and ... of proteomes or sets of proteins by using molecular ... mapping of genes and DNA sequencing to understand the ...
(Date:7/24/2014)... CA (PRWEB) July 24, 2014 Three ... be semi-finalists in Livestrong’s Big C Competition. Out of ... are each headed to the semi-final round. In this ... exclusive three-month accelerator program, complete with mentoring from thought-leaders ... , As part of the angelMD commitment to the ...
Breaking Biology Technology:Asterias Biotherapeutics Announces Live Investor Webcast 2Asterias Biotherapeutics Announces Live Investor Webcast 3Asterias Biotherapeutics Announces Live Investor Webcast 4Global Genomics and Proteomics Analytical Instruments Market 2014-2018: Key Vendors are Agilent, Bio-Rad , F. Hoffmann, La Roche, Illumina, PerkinElmer and Thermo Fisher Scientific 23 angelMD Startups Make Livestrong Big C Semi-finals 2
... CAMBRIDGE, Mass., Feb. 6 Idenix,Pharmaceuticals, Inc. (Nasdaq: ... corporate overview at the upcoming BIO CEO & Investor,Conference ... in the Park Avenue,Suite Center/North Room at the Waldorf-Astoria ... archived webcasts of the presentation can be accessed,under "Calendar ...
... YORK, Feb. 6 Over the past few ... has become increasingly,apparent. Multinational interest and investment in ... and competition is heating,up. On one hand big ... offshoring. On the other hand, drug safety issues, ...
... Feb. 6 /PRNewswire-FirstCall/ - Diagnostic Imaging,International Corp. (OTCBB: DIIG) ... has been cleared for quotation on the OTC Bulletin,Board., ... Company announced today that the corporate website is,now live ... work diligently to build on its business plan as,quickly ...
Cached Biology Technology:Contract Services for Big Pharma and Biotechs Driving Growth and Innovation from Discovery to Clinical Trials 2Diagnostic Imaging - New Stock Symbol - OTCBB: DIIG 2
(Date:7/25/2014)... on the land now called California, and many of ... plants they used for food, fuel, tools, and ritual. ... habitat and natural resources. , Frank Lake, an ecologist ... lead a field trip to the Stone ... America,s 99th Annual Meeting, in Sacramento, Cal. this August. ...
(Date:7/25/2014)... A study published online in the International ... novel approach to preventing cervical cancer based on findings ... after removal of a discrete population of cells in ... study that looked at squamocolumnar junction cells, or SCJ ... have been implicated as the origins of cervical cancer. ...
(Date:7/25/2014)... University of Adelaide has opened the way for the development ... , In Australia, annual barley production is second only to ... one of the most important diseases of barley. , Senior ... composition of special growths on the cell walls of barley ... leaf. , The research, by the ARC Centre of Excellence ...
Breaking Biology News(10 mins):Fire ecology manipulation by California native cultures 2Fire ecology manipulation by California native cultures 3Clearing cells to prevent cervical cancer 2New hope for powdery mildew resistant barley 2
... How marine animals find their way back to their birthplace ... ocean has mystified scientists for more than a century. But ... Hill think they might finally have unraveled the secret. ... may read the magnetic field of their home area and ...
... STANFORD, Calif. Scientists around the world may benefit ... that will help them to home in on the ... Arend Sidow, PhD, associate professor of pathology and of ... launched the novel bioinformatics tool, which enlists evolution as ...
... will hold a colloquium to examine what lies ahead ... organisms. Leading researchers and students will discuss new tools ... from the perspectives of ecology, paleontology, phylogenetics, and biodiversity ... the Sackler Colloquium series, the event will take place ...
Cached Biology News:No place like home: New theory for how salmon, sea turtles find their birthplace 2No place like home: New theory for how salmon, sea turtles find their birthplace 3Powerful online tool for protein analysis provided pro bono by Stanford geneticist 2Powerful online tool for protein analysis provided pro bono by Stanford geneticist 3
... The Zero Blunt ... for Sequencing is designed ... sequencing of blunt-end PCR ... provides 5-minute TOPO Cloning ...
Recommend to use at 1000X dilutions for cell culture (e.g. Add 1 ul to 1 ml of culture medium.)...
Recombinant Human CCL21/6Ckine (Mucin Stalk Chimera)...
One-step, microplate or cuvet, colorimetric, detection range 0.78 ug/dL to 65 ug/dL Zn in serum, plasma, urine, saliva etc. Procedure: 10 min....
Biology Products: