Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > UJI researcher involved in groundbreaking physics study

Abstract:
A study has demonstrated that the behaviour of quantum dots is different from that posited by atomic physics so far, and this is due to the spin of the electron.

UJI researcher involved in groundbreaking physics study

Castelló de la Plana, Spain | Posted on April 2nd, 2009

This is one of the findings of the theoretical study carried out by Juan Ignacio Climente, a Ramón y Cajal researcher in the Department of Physical and Analytical Chemistry at the Universitat Jaume I (UJI), and other researchers from the National Research Council of Canada. The study has been recently published in Physical Review Letters, one of the most prestigious scientific journals in the field of physics.

The study reveals that the behaviour of quantum dots (sort of artificial atoms created with semiconductor materials) is different from that of natural atoms in similar conditions, when they combine to form molecules.

The experiments, conducted by the staff of the Naval Research Laboratory in Washington, have proved that quantum dots that use holes (electrons with a positive charge and a larger mass) instead of electrons (which have a negative charge) achieve an antibonding molecular ground state, in contrast to natural atoms, which need an extra supply of energy to achieve this state.

The new contribution enables researchers to influence the behaviour of quantum dots, and to give them convenient properties. That is why the research described marks a breakthrough in the study of fundamental physics, since it makes it possible to examine in the laboratory situations that could not be studied using natural atoms.

Today, quantum dots are used in optoelectronics for manufacturing lasers that emit light at a frequency that is in the infrared spectrum, thus obtaining greater efficiency; in biomedicine, as biomarkers, to offer clearer images; and in energy-efficient transistors, which are charged with only one electron.

The study results have served to open new research lines. Although it is still too early to know all the possible applications, there may be some in fields such as solar energy, where there is experimentation with third-generation panels (more efficient and economical than those used to date); computer memory devices with a higher density that consume less; treatment of diseases such as cancer, for which a quantum dot may be injected into the body in such a way that it finds the tumoral cell and is then heated with infrared light until the cell is killed; and in new lighting systems offering greater efficiency.


Full bibliographic information:
Antibonding Ground States in InAs Quantum-Dot Molecules, Phys. Rev. Lett. 102, 047401 (2009)
M. F. Doty (1), J. I. Climente (2), M. Korkusinski (3), M. Scheibnern (1), A. S. Bracker (1), P. Hawrylak (3), and D. Gammon (1)
(1) Naval Research Laboratory, Washington, D.C. 20375, USA
(2) CNR-INFM National Center on nanoStructures and bioSystems at Surfaces (S3), Via Campi 213/A, 41100 Modena, Italy
(3) Institute for Microstructural Sciences, National Research Council of Canada, Ottawa, Canada K1A 0R6

Url: http://link.aps.org/doi/10.1103/PhysRevLett.102.047401

####

About Universitat Jaume I
Universitat Jaume I teaches new, flexible and competitive programmes of studies and curricula that enable students to satisfactorily respond to and overcome every challenge set by modern society. At the same time, and with the purpose of providing all its students with the most complete training, pains are taken to foster educational exchanges with other countries.

For more information, please click here

Contacts:
Universitat Jaume I
Av. de Vicent Sos Baynat, s/n
12071 Castelló de la Plana
Spain
Phone: +34 964 72 80 00
FAX: +34 964 72 90 16

Copyright © Alpha Galileo

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Nanostructures Increase Corrosion Resistance in Metallic Body Implants May 24th, 2015

Iranian Scientists Use Magnetic Field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015

Basel physicists develop efficient method of signal transmission from nanocomponents May 23rd, 2015

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Possible Futures

Simulations predict flat liquid May 21st, 2015

Nature inspires first artificial molecular pump: Simple design mimics pumping mechanism of life-sustaining proteins found in living cells May 19th, 2015

NNCO and Museum of Science Fiction to Collaborate on Nanotechnology and 3D Printing Panels at Awesome Con May 19th, 2015

Quantum 'gruyères' for spintronics of the future: Topological insulators become a little less 'elusive' May 12th, 2015

Nanomedicine

Nanostructures Increase Corrosion Resistance in Metallic Body Implants May 24th, 2015

Iranian Scientists Use Magnetic Field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015

New Antibacterial Wound Dressing in Iran Can Display Replacement Time May 22nd, 2015

Researchers develop new way to manufacture nanofibers May 21st, 2015

Discoveries

Nanostructures Increase Corrosion Resistance in Metallic Body Implants May 24th, 2015

Iranian Scientists Use Magnetic Field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015

Basel physicists develop efficient method of signal transmission from nanocomponents May 23rd, 2015

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Announcements

Nanostructures Increase Corrosion Resistance in Metallic Body Implants May 24th, 2015

Iranian Scientists Use Magnetic Field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015

Basel physicists develop efficient method of signal transmission from nanocomponents May 23rd, 2015

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Quantum Dots/Rods

Statement by QD Vision regarding European Parliament’s Vote on Cadmium-Based Quantum Dots May 20th, 2015

Toward 'green' paper-thin, flexible electronics May 20th, 2015

Electricity generating nano-wizards: Quantum dots are an ideal nanolab to study the means to turning heat into electricity May 18th, 2015

QD Vision to Showcase Quantum Dot “Firsts” at Display Week 2015: Executives will present, demo current and future quantum dot technology May 13th, 2015

Nanobiotechnology

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Supercomputer unlocks secrets of plant cells to pave the way for more resilient crops: IBM partners with University of Melbourne and UQ May 21st, 2015

Researchers develop new way to manufacture nanofibers May 21st, 2015

Nature inspires first artificial molecular pump: Simple design mimics pumping mechanism of life-sustaining proteins found in living cells May 19th, 2015

Photonics/Optics/Lasers

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Samtec, Global Provider of Interconnect Systems, Joins IRT Nanoelec Silicon Photonics Program May 21st, 2015

Taking control of light emission: Researchers find a way of tuning light waves by pairing 2 exotic 2-D materials May 20th, 2015

Computing at the speed of light: Utah engineers take big step toward much faster computers May 18th, 2015

Solar/Photovoltaic

Efficiency record for black silicon solar cells jumps to 22.1 percent: Aalto University's researchers improved their previous record by over 3 absolute percents in cooperation with Universitat Politècnica de Catalunya May 18th, 2015

Wearables may get boost from boron-infused graphene: Rice U. researchers flex muscle of laser-written microsupercapacitors May 18th, 2015

Random nanowire configurations increase conductivity over heavily ordered configurations May 16th, 2015

ORNL demonstrates first large-scale graphene fabrication May 14th, 2015

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project