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:4/11/2017)... April 11, 2017 No two people ... at the New York University Tandon School of ... have found that partial similarities between prints are ... in mobile phones and other electronic devices can ... The vulnerability lies in the fact that fingerprint-based ...
(Date:4/5/2017)... YORK , April 5, 2017 Today ... is announcing that the server component of the HYPR ... known for providing the end-to-end security architecture that empowers ... HYPR has already secured over 15 million ... makers including manufacturers of connected home product suites and ...
(Date:3/30/2017)... March 30, 2017  On April 6-7, 2017, Sequencing.com ... Genome hackathon at Microsoft,s headquarters in ... will focus on developing health and wellness apps that ... Hack the Genome is the first hackathon for ... world,s largest companies in the genomics, tech and health ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... ... Dr. Bob Harman, founder and CEO of VetStem Biopharma, Inc. ... event entitled “Stem Cells and Their Regenerative Powers,” was held on August 31st, ... was joined by two human doctors: Peter B. Hanson, M.D., Chief of Orthopedic Surgery, ...
(Date:10/10/2017)... ... 2017 , ... The Pittcon Program Committee is pleased to ... who have made outstanding contributions to analytical chemistry and applied spectroscopy. Each award ... conference and exposition for laboratory science, which will be held February 26-March 1, ...
(Date:10/9/2017)... ... October 09, 2017 , ... The Giving ... marijuana products targeting the needs of consumers who are incorporating medical marijuana into ... in Phoenix, Arizona. , As operators of two successful Valley dispensaries, The Giving ...
(Date:10/7/2017)... WALTHAM, Mass. , Oct. 6, 2017 /PRNewswire/ ... pioneering work of three scientists, Jacques Dubochet, ... whose breakthrough developments in cryo-electron microscopy ... this technology within the structural biology community. The ... Scientific. Scientists can now routinely produce highly resolved, ...
Breaking Biology Technology:
Cached News: