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:7/9/2019)... ... July 09, 2019 , ... Murrieta Genomics, a ... incubator program. The founder and CEO of Tx Genetic, Helen Harrison, has spent ... suffering from epithelial connective tissue disorders. , “We are pleased and excited to ...
(Date:6/25/2019)... ... June 25, 2019 , ... ActX ... raw data, easily available from 23andMe, customers can get access to professionally reviewed ... available for both 23andMe Ancestry and Health + Ancestry customers., With the ActX ...
(Date:6/16/2019)... ... June 14, 2019 , ... Respected periodontist, Dr. ... fifth annual Neodent World Congress. Attended by thousands of dental clinicians from all ... in the world of dentistry. The three-day event featured a team of expert ...
Breaking Biology News(10 mins):
(Date:5/31/2019)... City, California (PRWEB) , ... ... ... allowance of our patent applications from the USPTO providing proprietary interest to ... AND METHOD FOR SLEEP DISORDER DIAGNOSIS AND TREATMENT… extends Somnology’s IP rights ...
(Date:5/22/2019)... ... May 22, 2019 , ... Artemis (formerly Agrilyst), the leading ... A funding round co-led by Astanor Ventures and Talis Capital ... and iSelect Fund . The company has raised $11.75m to date and will ...
(Date:5/14/2019)... TOWNSHIP, N.J. (PRWEB) , ... May 13, 2019 ... ... of custom built, helium-based leak testing instruments for the Pharmaceutical, Biotechnology, Medical Device ... new Heliumleak.com company website. The redesigned website aims to improve LDA’s ability to ...
(Date:5/4/2019)... SÃO PAULO, Brazil (PRWEB) , ... May 03, ... ... the lecture given by the President of the Dakila Pesquisas Association, the scientist ... of the Councilmen 2019, in Brasília (DF). Urandir detailed the results of some ...
Breaking Biology Technology:
Cached News: