Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Study of behaviour of semiconductor crystals of size less than 100 nanometres

Abstract:
The PhD thesis by Carlos Echeverría Arrondo, Doctor in Physics from the Public University of Navarre and entitled "On doped semiconductor quantum dots and magnetic nanowires", studied the behaviour and properties of nanometric-scale semiconductor crystals.

Study of behaviour of semiconductor crystals of size less than 100 nanometres

Spain | Posted on October 29th, 2010

The thesis explains in a theoretical manner, the properties of doped quantum points (with the presence of impurities) and of magnetic nanowires. Notable amongst the main conclusions was that the electronic properties of the nanocrystals with magnetic impurities depend on where they are located. It is possible that the magnetic properties of the quantum points change drastically in terms of size i.e. reducing their size while light is also capable of modifying the magnetism of the nanocrystals doped with manganese. So far, unknown crystalline geometry was also discovered which has low nanowires dimensions.

"The study of the nanometric structures is important in their physical behaviour which , differ from macroscopic solids to which we are accustomed", pointed out the researcher. Given their low dimensionality, the properties of nanocrystals and nanowires are often surprising and, at the same time, promising. This is true in respect to the development of new devices for example, nanomagnetism and optoelectronics. These two fields are dealt with in this PhD thesis". The theoretical study of nanostructures acts, on the one hand, to explain phenomena already observed experimentally and, on the other, to provide clues to the experimental physics involved with the new properties which will be of great interest to study as well as in regard to the results anticipated".

In respect to the possibility of manipulating the spin of a quantum point using light, "this result shows us, for example, that these nanocrystals will act as bits of information or devices carrying out logical operations or for systems for high-capacity storage. These nanoparticles could even operate for quantum computation, anticipating fantastic calculation speeds, unimaginable today".

The interest aroused by nanoscience and nanotechnology spurred Dr Echeverría was to study the behaviour of semiconductor crystals when their size is reduced to less than one hundred nanometres (a nanometre is a millionth part of a millimetre). "The possibilities of nanoscience and nanotechnology are wide ranging", he pointed out. "Magnetic properties at these dimensions can change drastically when the size of the particles is reduced and, in our investigation, we have shown that light is also capable of modifying the magnetism of nanocrystals".

He explained, "when quantum points or nanoparticles are involved, we are talking about nanocrystals of "zero" dimensions, while those of one dimension are known as nanowires. Thus, the properties of quantum points and nanowires not only depend on nanometric size but also on their shape and the presence of impurities".

For more information: www.basqueresearch.com/berria_irakurri.asp?Berri_Kod=2946&hizk=I

####

For more information, please click here

Contacts:
Amaia Portugal
Elhuyar Foundation
Zelai Haundi 3, Osinalde Industrialdea
20170 Usurbil
Spain

Tel: +34 943 363040
Fax: +34 943 363144

Copyright © CORDIS

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

Novel 'converter' heralds breakthrough in ultra-fast data processing at nanoscale: Invention bagged four patents and could potentially make microprocessor chips work 1,000 times faster October 20th, 2017

Strange but true: turning a material upside down can sometimes make it softer October 20th, 2017

Leti Coordinating Project to Develop Innovative Drivetrains for 3rd-generation Electric Vehicles: CEA Tech’s Contribution Includes Liten’s Knowhow in Magnetic Materials and Simulation And Leti’s Expertise in Wide-bandgap Semiconductors October 20th, 2017

MIPT scientists revisit optical constants of ultrathin gold films October 20th, 2017

Possible Futures

Novel 'converter' heralds breakthrough in ultra-fast data processing at nanoscale: Invention bagged four patents and could potentially make microprocessor chips work 1,000 times faster October 20th, 2017

Bringing the atomic world into full color: Researchers turn atomic force microscope measurements into color images October 19th, 2017

'Find the Lady' in the quantum world: International team of researchers presents method for quantum-mechanical swapping of positions October 18th, 2017

Long nanotubes make strong fibers: Rice University researchers advance characterization, purification of nanotube wires and films October 17th, 2017

Academic/Education

Two Scientists Receive Grants to Develop New Materials: Chad Mirkin and Monica Olvera de la Cruz recognized by Sherman Fairchild Foundation August 16th, 2017

Moving at the Speed of Light: University of Arizona selected for high-impact, industrial demonstration of new integrated photonic cryogenic datalink for focal plane arrays: Program is major milestone for AIM Photonics August 10th, 2017

Graduate Students from Across the Country Attend Hands-on NanoCamp: Prominent scientists Warren Oliver, Ph.D., and George Pharr, Ph.D., presented a weeklong NanoCamp for hand-picked graduate students across the United States July 26th, 2017

The Physics Department of Imperial College, London, uses the Quorum Q150T to deposit metals and ITO to make plasmonic sensors and electric contact pads July 13th, 2017

Nanoelectronics

Nanometrics Announces Preliminary Results for the Third Quarter of 2017: Quarterly Results Impacted by Delays in Revenue Recognition on Multiple Systems into Japan October 12th, 2017

Seeing the next dimension of computer chips: Researchers image perfectly smooth side-surfaces of 3-D silicon crystals with a scanning tunneling microscope, paving the way for smaller and faster computing devices October 11th, 2017

Columbia engineers invent breakthrough millimeter-wave circulator IC October 6th, 2017

Tungsten offers nano-interconnects a path of least resistance: Crystalline tungsten shows insight and promise in addressing the challenges of electrical interconnects that have high resistivity at the nanoscale October 4th, 2017

Announcements

Novel 'converter' heralds breakthrough in ultra-fast data processing at nanoscale: Invention bagged four patents and could potentially make microprocessor chips work 1,000 times faster October 20th, 2017

Strange but true: turning a material upside down can sometimes make it softer October 20th, 2017

Leti Coordinating Project to Develop Innovative Drivetrains for 3rd-generation Electric Vehicles: CEA Tech’s Contribution Includes Liten’s Knowhow in Magnetic Materials and Simulation And Leti’s Expertise in Wide-bandgap Semiconductors October 20th, 2017

MIPT scientists revisit optical constants of ultrathin gold films October 20th, 2017

Quantum Dots/Rods

Quantum communications bend to our needs: By changing the wavelengths of entangled photons to those used in telecommunications, researchers see quantum technology take a major leap forward September 28th, 2017

Band Gaps, Made to Order: Engineers create atomically thin superlattice materials with precision September 26th, 2017

New approach on research and design for CQD catalysts in World Scientific NANO August 2nd, 2017

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

Photonics/Optics/Lasers

Novel 'converter' heralds breakthrough in ultra-fast data processing at nanoscale: Invention bagged four patents and could potentially make microprocessor chips work 1,000 times faster October 20th, 2017

MIPT scientists revisit optical constants of ultrathin gold films October 20th, 2017

Rice U. study: Vibrating nanoparticles interact: Placing nanodisks in groups can change their vibrational frequencies October 16th, 2017

Injecting electrons jolts 2-D structure into new atomic pattern: Berkeley Lab study is first to show potential of energy-efficient next-gen electronic memory October 13th, 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