Navigation Links
Controlling superconductors with light
Date:8/27/2012

A superconductor, which can move electrical energy with no wasteful resistance, is the holy grail of cost-effective, efficient, and "green" power production. Unlike traditional conductors such as copper or silver, which waste power resources and lose energy when they heat up, an ideal superconductor would continuously carry electrical current without losing any power.

But creating a true superconductor is tricky. Though the concept of high temperature superconductors is more than two decades old, finding and controlling the right materials has been a challenge. Now Prof. Yoram Dagan of Tel Aviv University's Department of Physics and Center for Nanoscience and Nanotechnology has discovered an innovative way to manipulate superconducting materials.

Temperature is a crucial element for superconductors, explains Prof. Dagan each material has a critical temperature when it becomes superconducting. But by manipulating different types of light, including UV and visible light, he and his fellow researchers are able to alter the critical temperatures of superconducting materials. This finding adds to a growing toolbox for controlling and improving the technology.

The research has been published in Angewandte Chemie and featured in Nature Nanotechnology.

Shining a light

Scientists have long sought ways to alter the temperature of superconducting materials, making them more practical. One of these methods includes chemical doping, removing or adding ions such as oxygen to alter the critical temperature of the material. But Prof. Dagan said that he and his fellow researchers were inspired to find a simpler way.

In the lab, they put a thin layer, one organic molecule thick, atop a superconducting film, approximately 50 nanometers thick. When researchers shined a light on these molecules, the molecules stretched and changed shape, altering the properties of the superconducting film most importantly, altering the critical temperature at which the material acted as a superconductor.

The researchers tested three separate molecules. The first was able to increase the critical temperature of the superconducting film. With the second molecule, they found that shining an ultraviolet light heightened the material's critical temperature, while visible light lowered it. Finally, with the third molecule, they found that simply by turning a light on, critical temperature was raised and lowered again when the light was switched off. Prof. Dagan calls this discovery a new "knob" for controlling the temperature of superconducting materials.

Small changes, big impact

The power of this finding is that instead of changing the temperature of the material itself, a more complicated process, the material can remain at the same temperature when the film is altered. This is a small change that results in very large responses from devices, says Prof. Dagan: "It's a strong response for a small amount of light."

One of the potential future applications of this finding might be a "non-dissipated memory," which would be able to save data and run continuously without generating heat and wasting energy.


'/>"/>

Contact: George Hunka
ghunka@aftau.org
212-742-9070
American Friends of Tel Aviv University
Source:Eurekalert  

Related medicine news :

1. Study finds people have difficulty controlling multiple chronic conditions
2. Aggressively controlling glucose levels may not reduce kidney failure in Type 2 diabetes
3. Novel drug candidates offer new route to controlling inflammation
4. Sooner Is Better for Controlling Obese Kids Weight: Study
5. Electronic Cigarettes Have Slight Impact on Heart: Study
6. Virus detector harnesses ring of light in whispering gallery mode
7. Study of Brain-Injured Man Sheds Light on Self-Awareness
8. Deadly outbreak of West Nile virus highlights urgent need for more research, funding
9. Researchers highlight treatment, research needs for homeless families
10. MRI findings shed light on multiple sclerosis
11. Genetic Research Sheds Light on Jewish Diaspora
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Controlling superconductors with light
(Date:12/7/2016)... ... December 07, 2016 , ... AlignLife clinics nationwide are giving back ... not fortunate enough to receive bountiful gifts wrapped tightly under a Christmas Tree. ... the children of the world. , In exchange for generous donations, customers will receive ...
(Date:12/7/2016)... ... 2016 , ... Sharon Kleyne, host of the nationally syndicated radio program, The ... of America, declared on her radio program in November 2016 the need to educate ... bullies attack leaders in corporate America, they are trying to take advantage of successful ...
(Date:12/7/2016)... Phoenix, Arizona (PRWEB) , ... December 07, 2016 , ... ... Juvederm®, Just in Time For The Holiday Party Season. Save Up To 33% Off ... and Laser Salon is providing the Phoenix Valley with Delightful Deals on ...
(Date:12/7/2016)... ... December 07, 2016 , ... The medical profession is well aware that ... One major study analyzing heart attacks among 138,602 people recorded a 35% higher number ... We would all agree of courseā€“no time of year is a good time for ...
(Date:12/7/2016)... ... December 07, 2016 , ... ... its newest portable bioelectronic medicine device WellnessPro Plus for consumers and healthcare ... enhances the WellnessPro platform by expanding the treatment modalities available in a ...
Breaking Medicine News(10 mins):
(Date:12/6/2016)... LONDON , Dec. 6, 2016 ... report provides in-depth region wise and country wise ... this report include manufacturers of human vaccines products, ... players planning to enter the market. The ... global human vaccines market. Qualitative analysis comprises market ...
(Date:12/6/2016)... Dec. 6, 2016 Eurofins Genomics today ... the College of American Pathologists (CAP) and certification ... its new laboratory in Louisville, KY ... North American headquarters. "Our new CLIA-licensed ... which is still considered the ,Gold Standard, method ...
(Date:12/6/2016)... , Dec. 6, 2016  BTL Aesthetics today ... that its BTL Vanquish ME device was effectively ... delivery to the targeted tissue. The result: Significantly ... higher, with BTL Vanquish ME versus BTL Vanquish. ... physician network and their patients with the most ...
Breaking Medicine Technology: