Navigation Links
Ph.D. study of behavior of semiconductor crystals of size less than 100 nanometers
Date:9/15/2010

The PhD thesis by Carlos Echeverra 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.

The interest aroused by nanoscience and nanotechnology spurred Dr Echeverra 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".

The thesis studied 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 also depend on where they are located; it being possible that the magnetic properties of the quantum points change drastically on reducing their size; and light is capable of modifying the magnetism of the nanocrystals doped with manganese. A hitherto unknown crystalline geometry was also discovered, and which has low nanowires dimensions.

"The study of the nanometric structures is important in their physical behaviour, different 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 as regards the development of new devices related to, for example, nanomagnetism and optoelectronics, to mention two fields 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".

As regards 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".


'/>"/>

Contact: Oihane Lakar
o.lakar@elhuyar.com
0034-943-363-040
Elhuyar Fundazioa
Source:Eurekalert

Related biology technology :

1. AEterna Zentaris Announces Appointment of Prof. Jurgen Engel, Ph.D. as New President and CEO
2. WuXi AppTec Appoints Garry Takle, Ph.D. as VP of Operations and Joseph Hughes, Ph.D. as VP of Testing Services for Philadelphia Facility
3. Takeda San Francisco, Inc. Appoints Gregory Landes, Ph.D. Vice President of Antibody Research
4. Exosome Diagnostics Appoints Johan Skog, Ph.D., as Director of Genetics Research
5. David Hsia, Ph.D. Joins Kinex Pharmaceuticals Board of Directors
6. Cato T. Laurencin, M.D., Ph.D. to Join Osteotech Board of Directors
7. Two Luminaries Join Cequent Scientific Advisory Board: Judy Lieberman, M.D. Ph.D., and Patrice Courvalin, M.D.
8. SENOMYX CO-FOUNDER AND SCIENTIFIC ADVISORY BOARD MEMBER ROGER TSIEN, PH.D., AWARDED NOBEL PRIZE IN CHEMISTRY
9. Brain and Hearing Pioneer, Michael Merzenich, Ph.D. to Speak at Case Western Reserve University
10. James L. Wittliff, Ph.D., FACB, to Present Predicting Breast Cancer Outcome with Gene Expression Signatures on the Ziplex(R) System at the Association for Molecular Pathology Conference, October 30
11. ALine, Inc. Expands Management, Adding Roger Anderson, Ph.D., as VP of Operations
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/20/2017)... , ... June 20, 2017 , ... Do More with ... transition from being a trusted supplier in the weighing industry, to extending its expertise ... ELISA essays, enzyme reactions, immunoassays, hybridizations and more, allowing for its customers ...
(Date:6/19/2017)... PA (PRWEB) , ... June 19, 2017 , ... ... companies for over 50 years. One of the biggest challenges faced by life sciences, ... firm’s regulatory affairs services team is Kati Abraham , who is well known ...
(Date:6/16/2017)... ... ... CTNext , Connecticut’s go-to resource for entrepreneurial support, today announced the ... Piers in Stamford. , Nine finalists, all of whom are Connecticut-based companies and entrepreneurs, ... secure $10,000 awards to help support business growth. The winners included:, ...
(Date:6/15/2017)... ... June 15, 2017 , ... ... new medical device startup. Dan Parsley, angelMD’s SVP of Corporate Development, served as ... this angelMD syndicate is part of Saranas’ recently announced $4 million Series B ...
Breaking Biology Technology:
(Date:6/23/2017)... ITHACA, N.Y. , June 23, 2017 ... a leader in dairy research, today announced a new ... help reduce the chances that the global milk supply ... this dairy project, Cornell University has become the newest ... Food Supply Chain, a food safety initiative that includes ...
(Date:6/14/2017)... IBM ) is introducing several innovative partner startups at ... between startups and global businesses, taking place in ... startups will showcase the solutions they have built with IBM ... France is one of the most ... increase in the number of startups created between 2012 and ...
(Date:5/23/2017)... , May 23, 2017  Hunova, the first robotic gym for the ... been officially launched in Genoa, Italy . The first ... and the USA . The technology was developed ... market by the IIT spin-off Movendo Technology thanks to a 10 million ... News Release, please click: ...
Breaking Biology News(10 mins):