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.
Tracing aromatic molecules in the early universe
23.03.2017 | University of California - Riverside
New study maps space dust in 3-D
23.03.2017 | DOE/Lawrence Berkeley National Laboratory
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
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