Navigation Links
Radiation damage bigger problem in microelectronics than previously thought
Date:7/20/2012

the pool to rise. Much like the water in the pool, the electrons in a material are more sensitive to defects than the atoms."

To detect the electron dislocations, the physicists upgraded a 15-year-old method called coherent acoustic phonon spectroscopy (CAPS).

"CAPS is similar to the seismic techniques that energy companies use to search for underground oil deposits, only on a much smaller scale," said Steigerwald.

Oil explorers set off a series of small explosions on the surface and measure the sound waves that are reflected back to the surface. That allows them to identify and map the layers of different types of rock thousands of feet underground.

Similarly, CAPS generates a pressure wave that passes through a chunk of semiconductor by blasting its surface with an ultrafast pulse of laser light. As this happens, the researchers bounce a second laser off the pressure wave and measure the strength of the reflection. As the pressure wave encounters defects and deformities in the material, its reflectivity changes and this alters the strength of the reflected laser light. By measuring these variations, the physicists can detect individual defects and measure the effect that they have on the material's electrical and optical properties.

The physicists tested their technique on a layer of gallium arsenide semiconductor that they had irradiated with high-energy neon atoms. They found that the structural damage caused by an embedded neon atom spread over a volume containing 1,000 atoms considerably more extensive than that shown by other techniques.

"This is significant because today people are creating nanodevices that contain thousands of atoms," said Steigerwald. One of these devices is a solar collector made from quantum dots, tiny semiconductor beads that each contains a few thousand atoms. "Our results may explain recent studies that have found that these quantum-dot solar collectors are less efficient than pr
'/>"/>

Contact: David Salisbury
david.salisbury@vanderbilt.edu
615-343-6803
Vanderbilt University
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Radiation-resistant circuits from mechanical parts
2. Novel radiation surveillance technology could help thwart nuclear terrorism
3. University of Utah chemists use nanopores to detect DNA damage
4. New UCLA method quickly IDs nanomaterials that can cause oxidative damage to cells
5. Scientists learn how to out run damage with imaging technique
6. Notre Dame paper examines nanotechnology-related safety and ethics problem
7. Entrepreneurs to Eat Problems for Breakfast in San Diego
8. Study suggests expanding the genetic alphabet may be easier than previously thought
9. Radius Closes $27.65 Million Second Tranche of Previously Announced Financing
10. Scientists read monkeys inner thoughts
11. Paralyzed individuals use thought-controlled robotic arm to reach and grasp
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/20/2014)... university inventions licensed to biotechnology firms has revealed ... open these roadblocks, the researchers suggest that better ... stage could lead to faster commercialization down the ... discoveries made in university laboratories and licensed to ... trials, which have a high failure rate. But ...
(Date:8/20/2014)... Neurotrope, Inc. (OTCQB: NTRP) today announced ... provide an update on Company activities. Access information:Date:Tuesday, ... 505-4369 (U.S. and Canada) or (719) 325-2315 Conference ... under "Investor Relations"The teleconference replay will be available ... 2014 at (888) 203-1112 (U.S. and ...
(Date:8/20/2014)... International Corporation (NASDAQ: PRXL ) announced today ... Conference in New York.  Ingo Bank , Senior ... a presentation on PAREXEL and discussing business developments at ... A live webcast of the discussion will be ... www.PAREXEL.com in the Upcoming Events portion of ...
(Date:8/20/2014)... 20, 2014 /PRNewswire-iReach/ -- A case study from ... the school,s bioengineering department and the Intel® Internet ... Software Academic Program, UCSD,s research focuses on exploring ... body.  Photo - http://photos.prnewswire.com/prnh/20140819/137540 ... work of Dr. Todd P. Coleman , ...
Breaking Biology Technology:Early bottlenecks in developing biopharmaceutical products delay commercialization 2Early bottlenecks in developing biopharmaceutical products delay commercialization 3Neurotrope To Host Conference Call 2PAREXEL International To Present At Baird Healthcare Conference 2Intel and University of San Diego Bioengineering Department Release Case Study on Health Sciences Research 2
... 14, 2012 AMPAC Fine Chemicals LLC (AFC), a ... APFC ), reports that it has joined Rx-360 ... biotech industry consortium that was founded by industry leaders ... and to assure the quality and authenticity of the ...
... 2012 Neuralstem, Inc. (NYSE Amex: CUR ) ... registered direct placement of 5,200,000 shares of common stock at ... with an exercise price of $1.02 per share and exercisable ... of five years. The company received aggregate gross proceeds of ...
... Ill., Feb. 13, 2012 Hospira, Inc.  (NYSE: ... injectable drugs and infusion technologies, today announced the hiring ... and compliance capabilities, including the appointment of Zena G. ... 2012. In this role, Ms. Kaufman will have overall ...
Cached Biology Technology:AMPAC Fine Chemicals Continues to Invest in Quality Systems 2AMPAC Fine Chemicals Continues to Invest in Quality Systems 3Neuralstem Announces Closing of $5.2-Million Registered Direct Offering 2Hospira Names Zena G. Kaufman Senior Vice President of Quality; Strengthens Quality and Compliance Capabilities With Addition of Top Industry Talent 2Hospira Names Zena G. Kaufman Senior Vice President of Quality; Strengthens Quality and Compliance Capabilities With Addition of Top Industry Talent 3Hospira Names Zena G. Kaufman Senior Vice President of Quality; Strengthens Quality and Compliance Capabilities With Addition of Top Industry Talent 4Hospira Names Zena G. Kaufman Senior Vice President of Quality; Strengthens Quality and Compliance Capabilities With Addition of Top Industry Talent 5
(Date:8/21/2014)... developed a novel and versatile modeling strategy to simulate ... materials as well as for studying polyelectrolytes, including DNA ... model much larger and more complex polyelectrolyte systems, and ... lead author of a paper on the work and ... Science and Engineering. "This is a big step forward ...
(Date:8/20/2014)... ITHACA, N.Y. In a study of 158 pregnant ... the craving and intentional consumption of ice, cornstarch, ... items, reports a new Cornell study. , Moreover, such ... teens who did not eat nonfood substances. , Pregnant ... low hemoglobin, which can lead to iron deficiency and ...
(Date:8/20/2014)... Issue Serious allergic reactions to food ... for some children.    What you should know ... allergies and this number may be increasing, especially among children. ... have food allergies.  The symptoms of allergic ... breathing difficulties and loss of consciousness. Symptoms can also develop ...
Breaking Biology News(10 mins):Researchers develop models to study polyelectrolytes, including DNA and RNA 2Pica in pregnant teens linked to low iron 2Information Update - Allergens and food safety at school - What's in your child's lunch? 2Information Update - Allergens and food safety at school - What's in your child's lunch? 3
... Spanish . , The potentially deadly yellow-fever-transmitting ... a compound called octenol as one way to find a ... scientists report. Scientists have long known that mosquitoes can ... Joseph Dickens and Jonathan Bohbot explains in greater detail how ...
... American Institute of Biological Sciences (AIBS) has selected Meredith ... Davis, Ryan Richards, a graduate student at the University ... student at the University of Rhode Island, to receive ... "AIBS is committed to fostering a productive ...
... Spring Harbor, NY -- One seemingly insurmountable obstacle to the ... wheat and rice is the dependence of those plants on ... and egg -- combine randomly to generate a genetically unique ... But what if plants like these could be engineered ...
Cached Biology News:ARS study provides a better understanding of how mosquitoes find a host 2AIBS names emerging public policy leaders 2AIBS names emerging public policy leaders 3CSHL-Mexican team coaxes sexually reproducing plant to brink of asexual reproduction 2
... The "egg crate" style strip holder is ... bottom strips. Linkage: This CLS number is ... match Cornings product number. If showing no ... Sigma-Aldrich number (Z71,456-9) or contact customer service ...
... Streptavidin-AP Systems provide rapid, precise localization ... in frozen or paraffin-embedded tissue, cytospins ... also facilitate double or triple labeleing ... simultaneously with primary antibodies of different ...
Designed for use with all 96-well SPRI reagent kits. Used with round bottom 96-well microplates, and 96-well thermal cycling plates....
... pre-amplifier suitable for a broad range of ... recording physiological signal such as ECG, EMG, ... for use with a wide range of ... a stimulus artefact clamp to avoid saturation ...
Biology Products: