Navigation Links
New player in electron field emitter technology makes for better imaging and communications
Date:3/8/2013

Scientists at the National Institute of Standards and Technology (NIST) and the University of Maryland, College Park, have built a practical, high-efficiency nanostructured electron source. Described in the journal Nanotechnology*, this new, patent-pending technology could lead to improved microwave communications and radar, and more notably to new and improved X-ray imaging systems for security and health-care applications.

While thermionic electron sources such as the hot filaments inside cathode ray tubes have largely been replaced by LEDs and liquid crystals for display screens and televisions, they are still used to produce microwaves for radar and X-rays for medical imaging. Thermionic sources use an electric current to boil electrons off the surface of a wire filament, similar to the way an incandescent light bulb uses an electric current to heat a wire filament until it glows.

And like an incandescent light bulb, thermionic sources are generally not very energy efficient. It takes a lot of power to boil off the electrons, which spew in every direction. Those that aren't lost have to be captured and focused using a complicated system of electric and magnetic fields. Field emission electron sources require much less power and produce a much more directional and easily controllable stream of electrons.

To build their field emission source, the NIST team took a tough materialsilicon carbideand used a room-temperature chemical process to make it highly porous like a sponge. They then patterned it into microscopic emitting structures in the shape of pointed rods or sharp-edged fins. When an electric field is applied, these novel field emitters can produce an electron flow comparable to a thermionic source but without all the disadvantagesand with many advantages.

According to co-inventor Fred Sharifi, the new field emitters have inherently fast response times compared with thermionic sources, and the absence of h
'/>"/>

Contact: Mark Esser
mark.esser@nist.gov
301-975-8735
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

0

GOOD

Page: 1 2

Related biology technology :

1. ResearchMoz: Vaccine Production Market (Trends, Techniques, Key Players, Spending Estimates and Forecasts)
2. BioInformatics LLC New Market Report – Opportunities for New Players in the Growing Stem Cell Market
3. Lucintel Report Outlines Significant Growth Opportunities for Continuous Fiber Thermoplastic Industry Players During 2012-2017
4. Enterprise Mobility players NuWare & VeliQ form a global partnership to deliver mPaaS solutions
5. Are electron tweezers possible? Apparently so
6. Researching graphene nanoelectronics for a post-silicon world
7. UCSB professor receives award for graphene electronics research
8. Researchers develop one of the worlds smallest electronic circuits
9. New path to flex and stretch electronics
10. Nanowiggles: Scientists discover graphene nanomaterials with tunable functionality in electronics
11. Smaller and more powerful electronics requires the understanding of quantum jamming physics
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New player in electron field emitter technology makes for better imaging and communications
(Date:6/18/2013)... 2013) A million electric cars could be on roads ... the help of research by the United States Department of ... , Professor Zhongwei Chen is part of a team led ... materials to replace the expensive platinum catalysts in fuel cells. ... fuel cells in vehicles is the cost of the units. ...
(Date:6/18/2013)... 18, 2013 In support of Swiss ... Consulate General of Switzerland in New York is pleased ... MS Tûranor PlanetSolar , to Manhattan. PlanetSolar is ... Expedition 2013 tour with scientists on board from the ... d’Aboville, runs exclusively on energy from the sun and ...
(Date:6/18/2013)... June 18, 2013 The Regulatory ... of two new offices in Asia—one in Singapore and ... serve as RAPS’ Pan-Asia office , serving the ... more focused on audiences within China. , The announcement ... partnership with five Singapore government agencies to develop and ...
(Date:6/18/2013)... The human skin is the largest organ, ... human body part. Similar to the liver, or heart, the ... repair and grow. Recent reports from the mankatofreepress.com explained how ... as important as other life supporting organs. The article suggests ... cell reproduction, increase the appearance of skin, and fight off ...
Breaking Biology Technology:US and Canadian researchers drive towards cheaper fuel cells for electric cars 2Switzerland’s MS Tûranor PlanetSolar, the World’s Largest Solar Boat, Arrives in New York City 2Switzerland’s MS Tûranor PlanetSolar, the World’s Largest Solar Boat, Arrives in New York City 3Switzerland’s MS Tûranor PlanetSolar, the World’s Largest Solar Boat, Arrives in New York City 4RAPS Opens Offices in Singapore and China 2RAPS Opens Offices in Singapore and China 3Natural Acne Remedies Through Diet, Probiotic Action Shares New Insight on What Foods May Help Lead to Clear Skin 2
... /PRNewswire-FirstCall/ - BioMS Medical Corp (TSX: MS), a leading ... that effective on March 16, 2009 the exercise term ... the holder to purchase one Class A common share ... extended from March 23, 2009 to December 31, 2009. ...
... Food Processing, Industry,VANCOUVER, March 2 ... "the Company") today announced that it has completed ... dehydration equipment to CAL-SAN Enterprises, Ltd. of Richmond, ... With this sale, EnWave has proven that it ...
... Part of "In the Zone for UC" Campaign, Centocor ... & Colitis Foundation of America for Each Point Pisani ... Centocor Ortho Biotech Inc. announced today a partnership with ... ulcerative colitis (UC) and funding to support continued education ...
Cached Biology Technology:BioMS Medical warrant extension 2EnWave Successfully Commercializes nutraREV(TM) Food Dehydration Technology 2EnWave Successfully Commercializes nutraREV(TM) Food Dehydration Technology 3EnWave Successfully Commercializes nutraREV(TM) Food Dehydration Technology 4Pro Hockey Player Fernando Pisani Looks to Shoot and Score Against Ulcerative Colitis 2Pro Hockey Player Fernando Pisani Looks to Shoot and Score Against Ulcerative Colitis 3Pro Hockey Player Fernando Pisani Looks to Shoot and Score Against Ulcerative Colitis 4
(Date:6/18/2013)... June 19, 2013  Paris Air Show – ... Test Systems) , a leading provider of innovative ... is demonstrating its solutions this week at the ... With growing challenges including increasingly complex armament systems ... feature-rich, specialized aerospace test solutions that address legacy ...
(Date:6/18/2013)... been awarded a $394,300 grant from the Tarrant ... flow in the new facilities of the 150-mile ... associate professor of civil engineering, will investigate the ... the water in an effort to eliminate biological ... Adding monochloramine is widely practiced throughout the United ...
(Date:6/18/2013)... Laboratory of Molecular Biology, has been honored as ... Award. Torrent is being recognized for his outstanding ... predict antimicrobial regions in proteins. Luis Rivas, Centro ... this algorithm to interrogate full genomes in order ... appealing results." , Torrent obtained his Ph.D. ...
Breaking Biology News(10 mins):Marvin Test Solutions Demonstrates Next-Generation Armament Test Solutions at Paris Air Show 2Marvin Test Solutions Demonstrates Next-Generation Armament Test Solutions at Paris Air Show 3UT Arlington research to benefit quality, flow in 150-mile Integrated Pipeline 2The American Society for Microbiology honors Marc Torrent 2
... Understanding the tens of thousands of proteins that compose the ... century, and research efforts to date have already enabled major ... potential avenues have been blocked by lack of information about ... bulk of these so far enigmatic proteins may now be ...
... Displays, Without Sacrificing Display Viewing QualityTHE WOODLANDS, Texas, ... UNXL), the developer of a unique new thin ... announced the availability of test samples for customers. ... to produce a transparent protective cover film that ...
... University of Pennsylvania has completed a research study begun in ... the northwest Atlantic Ocean around Mount Desert Island, Me., has ... during less than a century, providing a clear illustration of ... is published in the current issue of the Proceedings ...
Cached Biology News:New high-throughput screening technique makes probing puzzling proteins possible 2New high-throughput screening technique makes probing puzzling proteins possible 3New high-throughput screening technique makes probing puzzling proteins possible 4New high-throughput screening technique makes probing puzzling proteins possible 5UniPixel Announces Availability of Opcuity(TM) Finger Print Resistant Film Test Samples 2UniPixel Announces Availability of Opcuity(TM) Finger Print Resistant Film Test Samples 3Penn biologists demonstrate that size matters... in snail shells 2Penn biologists demonstrate that size matters... in snail shells 3
... is designed to allow neomycin/kanamycin selection ... The loxP-PGK-gb2-neo-loxP template encodes the neomycin/kanamycin ... promoter (gb2) for expression of kanamycin ... promoter (PGK) for expression of neomycin ...
These are replacement caps for No. CLS6980 5mm PYREX NMR tubes. Proper method to remove caps is to slice them from the tube. Caps come in eight assorted/mixed colors. Packed in bags of 100....
... This CLS number is a ... easily match Cornings product number. ... please order under the old ... customer service for assistance. ID ...
Preparation TW--Compatibility: Push-on end cap seals suitable up to 70 C only -Hybridization Tube for Model HB-1D -Comp Dim: 200 80 mm -Material: borosilicate glass -Mfr Desig: Techne FHB-12...
Biology Products: