Nanotechnology Now

Our NanoNews Digest Sponsors


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

Superheroes are real: Ultrasensitive nonlinear metamaterials for data transfer June 25th, 2016

Russian physicists create a high-precision 'quantum ruler': Physicists have devised a method for creating a special quantum entangled state June 25th, 2016

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Ultrathin, flat lens resolves chirality and color: Multifunctional lens could replace bulky, expensive machines June 25th, 2016

Possible Futures

Superheroes are real: Ultrasensitive nonlinear metamaterials for data transfer June 25th, 2016

Russian physicists create a high-precision 'quantum ruler': Physicists have devised a method for creating a special quantum entangled state June 25th, 2016

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Nanomedicine

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Self-assembling icosahedral protein designed: Self-assembling icosahedral protein designed June 22nd, 2016

Stealth nanocapsules kill Chagas parasites in mouse models June 22nd, 2016

Discoveries

Superheroes are real: Ultrasensitive nonlinear metamaterials for data transfer June 25th, 2016

Russian physicists create a high-precision 'quantum ruler': Physicists have devised a method for creating a special quantum entangled state June 25th, 2016

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Ultrathin, flat lens resolves chirality and color: Multifunctional lens could replace bulky, expensive machines June 25th, 2016

Announcements

Superheroes are real: Ultrasensitive nonlinear metamaterials for data transfer June 25th, 2016

Russian physicists create a high-precision 'quantum ruler': Physicists have devised a method for creating a special quantum entangled state June 25th, 2016

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Ultrathin, flat lens resolves chirality and color: Multifunctional lens could replace bulky, expensive machines June 25th, 2016

Quantum Dots/Rods

A new form of hybrid photodetectors with quantum dots and graphene June 19th, 2016

Supercrystals with new architecture can enhance drug synthesis May 24th, 2016

ORNL demonstrates large-scale technique to produce quantum dots May 21st, 2016

First single-enzyme method to produce quantum dots revealed: Biological manufacturing process, pioneered by three Lehigh University engineers, produces equivalent quantum dots to those made chemically--but in a much greener, cheaper way May 9th, 2016

Nanobiotechnology

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Tailored DNA shifts electrons into the 'fast lane': DNA nanowire improved by altering sequences June 22nd, 2016

Self-assembling icosahedral protein designed: Self-assembling icosahedral protein designed June 22nd, 2016

Stealth nanocapsules kill Chagas parasites in mouse models June 22nd, 2016

Photonics/Optics/Lasers

Superheroes are real: Ultrasensitive nonlinear metamaterials for data transfer June 25th, 2016

Russian physicists create a high-precision 'quantum ruler': Physicists have devised a method for creating a special quantum entangled state June 25th, 2016

Marrying superconductors, lasers, and Bose-Einstein condensates: Chapman University Institute for Quantum Studies (IQS) member Yutaka Shikano, Ph.D., recently had research published in Scientific Reports June 20th, 2016

A new trick for controlling emission direction in microlasers June 20th, 2016

Solar/Photovoltaic

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

New generation of high-efficiency solar thermal absorbers developed June 20th, 2016

Novel capping strategy improves stability of perovskite nanocrystals: Study addresses instability issues with organometal-halide perovskites, a promising class of materials for solar cells, LEDs, and other applications June 13th, 2016

Perovskite solar cells surpass 20 percent efficiency: EPFL researchers are pushing the limits of perovskite solar cell performance by exploring the best way to grow these crystals June 13th, 2016

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







Car Brands
Buy website traffic