Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

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

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Unveiling the quantum necklace: Researchers simulate quantum necklace-like structures in superfluids May 26th, 2017

Possible Futures

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Unveiling the quantum necklace: Researchers simulate quantum necklace-like structures in superfluids May 26th, 2017

Nanomedicine

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Zap! Graphene is bad news for bacteria: Rice, Ben-Gurion universities show laser-induced graphene kills bacteria, resists biofouling May 22nd, 2017

Sensors detect disease markers in breath May 19th, 2017

Discoveries

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Unveiling the quantum necklace: Researchers simulate quantum necklace-like structures in superfluids May 26th, 2017

Announcements

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Unveiling the quantum necklace: Researchers simulate quantum necklace-like structures in superfluids May 26th, 2017

Quantum Dots/Rods

The brighter side of twisted polymers: Conjugated polymers designed with a twist produce tiny, brightly fluorescent particles with broad applications May 16th, 2017

Nanoparticles open new window for biological imaging: “Quantum dots” that emit infrared light enable highly detailed images of internal body structures April 10th, 2017

Particle Works creates range of high performance quantum dots February 23rd, 2017

Strem Chemicals and Dotz Nano Ltd. Sign Distribution Agreement for Graphene Quantum Dots Collaboration February 21st, 2017

Nanobiotechnology

Zap! Graphene is bad news for bacteria: Rice, Ben-Gurion universities show laser-induced graphene kills bacteria, resists biofouling May 22nd, 2017

Sensors detect disease markers in breath May 19th, 2017

Oddball enzyme provides easy path to synthetic biomaterials May 17th, 2017

The brighter side of twisted polymers: Conjugated polymers designed with a twist produce tiny, brightly fluorescent particles with broad applications May 16th, 2017

Photonics/Optics/Lasers

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Researchers find new way to control light with electric fields May 25th, 2017

Zap! Graphene is bad news for bacteria: Rice, Ben-Gurion universities show laser-induced graphene kills bacteria, resists biofouling May 22nd, 2017

Plasmon-powered upconversion nanocrystals for enhanced bioimaging and polarized emission: Plasmonic gold nanorods brighten lanthanide-doped upconversion superdots for improved multiphoton bioimaging contrast and enable polarization-selective nonlinear emissions for novel nanoscal May 19th, 2017

Solar/Photovoltaic

Three-dimensional graphene: Experiment at BESSY II shows that optical properties are tuneable May 24th, 2017

Stanford scientists use nanotechnology to boost the performance of key industrial catalyst May 18th, 2017

Fed grant backs nanofiber development: Rice University joins Department of Energy 'Next Generation Machines' initiative May 10th, 2017

Discovery of new transparent thin film material could improve electronics and solar cells: Conductivity is highest-ever for thin film oxide semiconductor material May 6th, 2017

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