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.
Further Improvement of Qubit Lifetime for Quantum Computers
09.12.2016 | Forschungszentrum Jülich
Electron highway inside crystal
09.12.2016 | Julius-Maximilians-Universität Würzburg
Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.
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Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
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