Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The structure of gold nanoparticles solved

21.08.2008
The research group lead by Professor Hannu Häkkinen of the Nanoscience Centre of the University of Jyväskylä, published an article concerning the structure of gold nanoparticles in a prominent American science journal Proceedings of the National Academy of Sciences.

The structure of gold nanoparticles has been largely unknown for over a decade. The current study helps to understand the stability, composition as well as electronic, chemical and optical properties of the particles.

"My personal dream came true late last year when a group led by Roger Kornberg at Stanford University made a breakthrough experiment determining the atomic structure of gold nanoparticles of a certain size. The structure resembled the prediction our research group had already earlier published. In the recent study we were able to comprehend why nature generates exactly these kinds of particles. The size of one particle is 1-3 nanometers, and since they behave in many respects like giant atoms, we call them superatoms in our study", Häkkinen explains.

Gold particles utilized to fight cancer?

Results of the study can be utilized in medicine, biomolecule research and nanoelectronics. With the help of gold nanoparticles it is, for instance, possible to destroy cancer cells. The particles are able to attach themselves to cancer cells due to a biologically compatible molecular overlayer. With the help of laser it is possible to heat the particles so much that the attached cancer cells die. Particles can also be used as a tracer when looking at biomolecules with an electron microscope. Nanoelectronics, for its part, can use gold nanoparticles as components in electrical circuits.

"Our study would not have been possible without the extensive high performance computing resources of the national IT centres of Finland, Germany and Sweden. The study took up quite a lot of computation time, but it was well worth the effort. I believe that our theoretical model on the stability of the gold nanoparticles will prove itself very useful in many interdisciplinary fields of research", Häkkinen notes.

In addition to Häkkinen’s research group researchers from Stanford University, Chalmers University of Technology in Göteborg and Georgia Institute of Technology in Atlanta collaborated in the study. In Finland the research has been funded by the Academy of Finland, the Finnish IT center for science and DEISA, Distributed European Infrastructure for Supercomputing Applications.

Liisa Harjula | alfa
Further information:
http://www.adm.jyu.fi
http://www.pnas.org/content/105/27/9157

Further reports about: Supercomputing atomic structure gold nanoparticle superatoms

More articles from Physics and Astronomy:

nachricht What happens when we heat the atomic lattice of a magnet all of a sudden?
17.07.2018 | Forschungsverbund Berlin

nachricht Subaru Telescope helps pinpoint origin of ultra-high energy neutrino
16.07.2018 | National Institutes of Natural Sciences

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

Im Focus: Chemical reactions in the light of ultrashort X-ray pulses from free-electron lasers

Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.

Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

Microscopic trampoline may help create networks of quantum computers

17.07.2018 | Information Technology

In borophene, boundaries are no barrier

17.07.2018 | Materials Sciences

The role of Sodium for the Enhancement of Solar Cells

17.07.2018 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>