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

Shining rings: A new material emits white light when exposed to electricity: New synthetic approach could spark development of other dynamic materials July 24th, 2017

Ultrathin device harvests electricity from human motion July 23rd, 2017

The July 23 close fly-by of asteroid 2017 BS5 is explored in a Q&A with Dr. John S. Lewis, chief scientist at Deep Space Industries July 23rd, 2017

Scientists announce the quest for high-index materials: All-dielectric nanophotonics: The quest for better materials and fabrication techniques July 22nd, 2017

Possible Futures

Shining rings: A new material emits white light when exposed to electricity: New synthetic approach could spark development of other dynamic materials July 24th, 2017

Ultrathin device harvests electricity from human motion July 23rd, 2017

The July 23 close fly-by of asteroid 2017 BS5 is explored in a Q&A with Dr. John S. Lewis, chief scientist at Deep Space Industries July 23rd, 2017

Scientists announce the quest for high-index materials: All-dielectric nanophotonics: The quest for better materials and fabrication techniques July 22nd, 2017

Nanomedicine

Shining rings: A new material emits white light when exposed to electricity: New synthetic approach could spark development of other dynamic materials July 24th, 2017

Scientists announce the quest for high-index materials: All-dielectric nanophotonics: The quest for better materials and fabrication techniques July 22nd, 2017

Probiotics: Novel biosynthetic tool to develop metallic nanoparticles: This research article by Dr. Nida Akhtar et al has been published in Recent Patents on Drug Delivery & Formulation, Volume 11, Issue 1, 2017 July 20th, 2017

Semiliquid chains pulled out of a sea of microparticles July 20th, 2017

Discoveries

Shining rings: A new material emits white light when exposed to electricity: New synthetic approach could spark development of other dynamic materials July 24th, 2017

Scientists announce the quest for high-index materials: All-dielectric nanophotonics: The quest for better materials and fabrication techniques July 22nd, 2017

Pulses of electrons manipulate nanomagnets and store information: Scientists use electron pulses to create and manipulate nanoscale magnetic excitations that can store data July 21st, 2017

The first light atomic nucleus with a second face July 20th, 2017

Announcements

Shining rings: A new material emits white light when exposed to electricity: New synthetic approach could spark development of other dynamic materials July 24th, 2017

Ultrathin device harvests electricity from human motion July 23rd, 2017

The July 23 close fly-by of asteroid 2017 BS5 is explored in a Q&A with Dr. John S. Lewis, chief scientist at Deep Space Industries July 23rd, 2017

Scientists announce the quest for high-index materials: All-dielectric nanophotonics: The quest for better materials and fabrication techniques July 22nd, 2017

Quantum Dots/Rods

Coupling a nano-trumpet with a quantum dot enables precise position determination July 14th, 2017

Graphene and quantum dots put in motion a CMOS-integrated camera that can see the invisible May 29th, 2017

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

Nanobiotechnology

Shining rings: A new material emits white light when exposed to electricity: New synthetic approach could spark development of other dynamic materials July 24th, 2017

Probiotics: Novel biosynthetic tool to develop metallic nanoparticles: This research article by Dr. Nida Akhtar et al has been published in Recent Patents on Drug Delivery & Formulation, Volume 11, Issue 1, 2017 July 20th, 2017

Semiliquid chains pulled out of a sea of microparticles July 20th, 2017

Researchers revolutionize vital conservation tool with use of gold nanotechnology and lasers: Cryopreservation study results have sweeping implications for wildlife conservation and human health July 15th, 2017

Photonics/Optics/Lasers

Scientists announce the quest for high-index materials: All-dielectric nanophotonics: The quest for better materials and fabrication techniques July 22nd, 2017

Nanoparticles could spur better LEDs, invisibility cloaks July 19th, 2017

'Upconverted' light has a bright future: Rice University professor developing plasmon-powered devices for medicine, security, solar cells July 17th, 2017

Researchers revolutionize vital conservation tool with use of gold nanotechnology and lasers: Cryopreservation study results have sweeping implications for wildlife conservation and human health July 15th, 2017

Solar/Photovoltaic

'Upconverted' light has a bright future: Rice University professor developing plasmon-powered devices for medicine, security, solar cells July 17th, 2017

Making two out of one: FAU researchers have explained the mechanism behind a process that can increase the efficiency of organic solar cells July 12th, 2017

Thinking thin brings new layering and thermal abilities to the semiconductor industry: In a breakthrough for the semiconductor industry, researchers demonstrate a new layer transfer technique called "controlled spalling" that creates many thin layers from a single gallium nitride July 11th, 2017

Tiny bubbles provide tremendous propulsion in new microparticles research-Ben-Gurion U. June 21st, 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