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While thermionic electron sources such as the hot filaments inside cathode ray tubes have largely been replaced by LEDs and liquid crystals for display screens and televisions, they are still used to produce microwaves for radar and X-rays for medical imaging.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:5/23/2013)... -- Rahal Letterman Lanigan Racing (RLL) and StemCyte, Inc., a ... and therapeutics, announced today that StemCyte has become an ... car driven by James Jakes . ... 2013 season.   StemCyte, Inc. and Rahal Letterman ... umbilical cord blood banking and its educational initiative ,Stars ...
(Date:5/23/2013)... , May 23, 2013  Saddleback Memorial Medical Center ... became the first hospital on the West Coast to ... new surgical option provides women with a state-of-the-art, minimally ... Marc Winter , M.D., a highly regarded ... and medical director of minimally invasive surgery at Saddleback ...
(Date:5/23/2013)... , May 23, 2013 Z Trim ... value-added ingredients to a variety of industries, announced that ... a panel discussion at this year,s National Restaurant Association ... 2013, on behalf of the Research Chefs Association.  Chef ... Restaurants: The Good, the Bad and the Ugly," joining ...
(Date:5/23/2013)... , May 23, 2013  Verenium Corporation (Nasdaq: ... on the development and commercialization of high-performance enzymes, today ... Financial Officer, will present at two upcoming conferences. ... will present at the Second Annual Marcum LLP Microcap ... Hyatt Hotel in New York City.  The presentation is ...
Breaking Biology Technology:StemCyte, Inc. Joins Rahal Letterman Lanigan Racing As Associate Sponsor Of No. 16 IndyCar Program For James Jakes Beginning With The 97th Indianapolis 500 2StemCyte, Inc. Joins Rahal Letterman Lanigan Racing As Associate Sponsor Of No. 16 IndyCar Program For James Jakes Beginning With The 97th Indianapolis 500 3Saddleback Memorial Surgeon First on the West Coast to Perform Single-Site Robotic Hysterectomy 2Saddleback Memorial Surgeon First on the West Coast to Perform Single-Site Robotic Hysterectomy 3Z Trim's Chef Erin Ryan sits on Expert Panel at NRA Show 2Z Trim's Chef Erin Ryan sits on Expert Panel at NRA Show 3Verenium To Present At Two Upcoming Conferences 2Verenium To Present At Two Upcoming Conferences 3
... PCR cloning with pcmv-script PCR cloning kit , ... Quinn,Lu ,Stratagene Cloning Systems, Inc. , , Stratagene ... cloning,strategy by introducing a new vector for high-efficiency cloning ... PCR,cloning kit uses a ...
... transfection reagent: A proven choice , ... transfection reagent offers,improved, consistent ... in,suspension. In this article, we summarize the results ... reagent. Optimizing transfection,conditions is a critical, preliminary step ...
... software aids image acquisition and processing , Michelle Cayouette *Michael Steege * ... Eagle Eyes Still Video System shown with Darkroom ... Stratagenes new Eagle Sight software version 3.0 allows researchers , ... information from stained , nucleic acids ...
Cached Biology Technology:Mammalian Expression Vector for Efficient Cloning of PCR Fragments 2Mammalian Expression Vector for Efficient Cloning of PCR Fragments 3Mammalian Expression Vector for Efficient Cloning of PCR Fragments 4Versatile Transfection Reagent Offers Low Toxicity and Consistent,Performance 2Versatile Transfection Reagent Offers Low Toxicity and Consistent,Performance 3Versatile Transfection Reagent Offers Low Toxicity and Consistent,Performance 4Versatile Transfection Reagent Offers Low Toxicity and Consistent,Performance 5Versatile Transfection Reagent Offers Low Toxicity and Consistent,Performance 6Versatile Transfection Reagent Offers Low Toxicity and Consistent,Performance 7Keys to Successful Densitometry 2Keys to Successful Densitometry 3Keys to Successful Densitometry 4Keys to Successful Densitometry 5Keys to Successful Densitometry 6
(Date:5/23/2013)... DNA around nucleosomes in the cell nucleus makes ... Ludwig-Maximilians-Universitaet (LMU) in Munich now describes a mechanism ... from nucleosomes for transcription. , In higher organisms ... nucleus, wrapped around disk-shaped particles called nucleosomes, each ... proteins and accommodating two loops of DNA. Packed ...
(Date:5/23/2013)... medics have succeeded in treating cerebral palsy with autologous ... damage, a 2.5 year old boy had been in ... survival. Just two months after treatment with the cord ... the following months, the child learned to speak simple ... from a Korean study, dispel the long-held doubts about ...
(Date:5/23/2013)... pathogens are growing increasingly resistant to the conventional antibiotics ... scientists has synthesized a potent new class of compounds ... , Writing online in the Journal of the ... of Wisconsin-Madison chemistry Professor Helen Blackwell describes agents that ... Staphylococcus aureus , a bacterium at the root of ...
Breaking Biology News(10 mins):Biochemistry: Unspooling DNA from nucleosomal disks 2First successful treatment of pediatric cerebral palsy with autologous cord blood 2University of Wisconsin chemists find new compounds to curb staph infection 2
... like Celecoxib have come under scrutiny lately due to ... fruit fly and rat models, researchers reveal another adverse ... interestingly, this effect is independent of the COX-2 enzyme. ... doses on the heart rate of Drosophila, a good ...
... History of Marine Animal Population , Edited by ... available on: http://shop.earthscan.co.uk/ProductDetails/mcs/productID/821 , Violent confrontations ... feature of the intense hunt for sponges on Floridas ... were the sponges themselves. Human harvesters not only depleted ...
... Society (ACS) News Service Weekly PressPac with news from ACS ... individual journal or the American Chemical Society as the source ... EXCEPT ARTICLE #5, which is embargoed for 9 A. M., ... IMMEDIATE RELEASE Seagull blood shows promise ...
Cached Biology News:Oceans Past: A Guide to Oceans Future 2Oceans Past: A Guide to Oceans Future 3Oceans Past: A Guide to Oceans Future 4Oceans Past: A Guide to Oceans Future 5Oceans Past: A Guide to Oceans Future 6American Chemical Society's weekly PressPac -- Jan. 9, 2008 2American Chemical Society's weekly PressPac -- Jan. 9, 2008 3American Chemical Society's weekly PressPac -- Jan. 9, 2008 4American Chemical Society's weekly PressPac -- Jan. 9, 2008 5American Chemical Society's weekly PressPac -- Jan. 9, 2008 6American Chemical Society's weekly PressPac -- Jan. 9, 2008 7American Chemical Society's weekly PressPac -- Jan. 9, 2008 8American Chemical Society's weekly PressPac -- Jan. 9, 2008 9
Microlite 1+ 1x12 Strip assembled, flat bottom; the ideal vessel for low signal luminescent reactions, offering medium binding with enhanced dynamic range, extra high reflectivity and minimal cross t...
Immulon 4 HBX 1x12 Strip, flat bottom; high binding extra surface with special resin and irradiation, offers maximum protein uptake....
... regulator and pressurized syringe holder for any researcher ... flow rate Microinjecting Fine microliter delivery ... added to any new or existing perfusion rig ... homemade. Connect to house air or a compressor ...
...
Biology Products: