HOME >> BIOLOGY >> NEWS
Scientists discover new way to study nanostructures

Scientists at the Georgia Institute of Technology have discovered a phenomenon which allows measurement of the mechanical motion of nanostructures by using the AC Josephson effect. The findings, which may be used to identify and characterize structural and mechanical properties of nanoparticles, including materials of biological interest, appear online in the journal Nature Nanotechnology.

The AC Josephson effect refers to work that Brian Josephson published in 1962 regarding the flow of an electrical current between superconductors. In this work, for which he shared a 1973 Nobel Prize, Josephson predicted that when a constant voltage difference is maintained across two weakly linked superconductors separated by a thin insulating barrier (an arrangement now known as a Josephson junction), an alternating electrical current would flow through the junction (imagine turning on a water faucet and having the water start flowing up as well as down once it leaves the spigot). The frequency of the current oscillations is directly related to the applied voltage.

These predictions were fully confirmed by an immense number of experiments, and the standard volt is now defined in terms of the frequency of the Josephson AC current. The Josephson effect has numerous applications in physics, computing and sensing technologies. It can be used for ultra high sensitive detection of electromagnetic radiation, extremely weak magnetic fields and in superconducting quantum computing bits.

Now, experimental physicist Alexei Marchenkov and theoretician Uzi Landman at Georgia Tech have discovered that the AC Josephson effect can be used to detect mechanical motion of atoms placed in the Josephson junction.

"We show here that in addition to being able to detect the effects of electromagnetic radiation on the AC Josephson current, one can also use it to probe mechanical motions of atoms or molecules placed in the junction, said Landman, directo
'"/>

Contact: David Terraso
d.terraso@gatech.edu
404-385-2966
Georgia Institute of Technology
24-Jul-2007


Page: 1 2 3

Related biology news :

1. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
2. Scientists prove that disputed Korean stem cell line comes from an unfertilized egg and not cloning
3. Scientists move closer to bio-engineered bladders
4. Scientists find stem cell switch
5. Scientists a step closer to understanding how anaesthetics work in the brain
6. Scientists to make news at Computational Biology Conference
7. Accident-prone? Scientists link brain function to knee injuries
8. Scientists take next step in understanding potential target for ovarian cancer treatment
9. Scientists find brown fat master switch
10. Scientists identify 2 distinct Parkinsons networks
11. Scientists follow familiar TRAIL to new cancer therapy

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/27/2017)... 27, 2017  Catholic Health Services (CHS) has ... Society (HIMSS) Analytics for achieving Stage 6 on ... . In addition, CHS previously earned a place ... an electronic medical record (EMR). "HIMSS ... of EMR usage in an outpatient setting.  This ...
(Date:3/24/2017)... The Controller General of Immigration from Maldives Mr. ... have received the prestigious international IAIR Award for the most innovative ... ... Maldives Immigration ... Algeen (small picture on the right) have received the IAIR award for ...
(Date:3/24/2017)... Research and Markets has announced the addition of the ... Forecast to 2025" report to their offering. ... The Global Biometric Vehicle Access System ... over the next decade to reach approximately $1,580 million by 2025. ... forecasts for all the given segments on global as well as ...
Breaking Biology News(10 mins):
(Date:3/27/2017)... , March 27, 2017 Neurotrope, ... novel therapies for neurodegenerative diseases, including Alzheimer,s disease, ... its application to list the Company,s common stock ... by The NASDAQ Stock Market, a unit of ... listing, Neurotrope will ring the Opening Bell at the ...
(Date:3/24/2017)... DUBLIN , Mar. 24, 2017 Research ... Stem Cell (hESC) Research - Global Strategic Business Report" report ... ... Cell (hESC) Research in US$ Million. Annual estimates and forecasts are ... are derived from primary and secondary research. The ...
(Date:3/24/2017)...   Sienna Biopharmaceuticals, Inc. , a privately held, ... Richard Peterson will join the company as ... who brings more than two decades of global financial ... retiring at the end of April but will continue ... Sienna from Novan, Inc., where he served as Chief ...
(Date:3/23/2017)... , ... March 23, 2017 , ... Lajollacooks4u is proud to announce it has become ... hosted corporate cooking challenges for companies around the world, such as Illumina, HP and Qualcomm, ... the reason for its increasing popularity is due to its new team building format, a ...
Breaking Biology Technology:
Cached News: