5, 10, or maybe 15? How many nanometers should nanoparticles of a catalyst measure to optimise the course of reaction? Researchers usually perform laborious tests to find the answer. Scientists at the Institute of Physical Chemistry PAS a new technique to improve the process of such optimisation in microfluidic systems. The size of catalyst nanoparticles can now be changed as needed during a continuous flow through the catalyst bed.
When chemists from the Institute of Physical Chemistry of the Polish Academy of Sciences in Warsaw were starting work on yet another material designed for the efficient production of nanocrystalline zinc oxide, they didn't expect any surprises. They were greatly astonished when the electrical properties of the changing material turned out to be extremely exotic.
Some isomeric states of superheavy elements may have half-lives measured in seconds, tens of thousands of times longer than the half-lives of their very unstable ground states. If such exotic nuclear states are experimentally produced, they will be stable enough to study their chemical properties.
Researchers from the Institute of Physics of the Polish Academy of Sciences demonstrated a new physical phenomenon: routing the emission of light using transverse magnetic field. This is a step towards avoiding the "bottleneck" that limits the development of fast information processing devices.
With the aid of simple theoretical models it is possible to build systems operating strictly according to the rules of classical physics, yet faithfully reproducing the predictions of quantum mechanics for single particles – even those that are the most paradoxical! So what is the real hallmark of quantum behaviour?
Physicists from universities Case Western, Stanford, Stony Brook and Warsaw proposed a theoretical model that suggests the possibility of experimental verification if inside photons exists linear structures in the form of strings of gluons connecting a quark to an antiquark . The photon sources can be arbitrary, high-energy charged particles, such at protons at LHC, schematically sketched in the figure. By emitting a photon, a proton turns to a detector.
Can the topology of microobjects influence the way they move in a fluid? Experiments and simulations of Polish and Swiss researchers published in the Physical Review Letters show that the dynamics of elastic chains settling in a fluid depends on the way they are knotted. The settling chains form flat, toroidal structures composed of several intertwined loops, which swirl around each other. The study is important for the proper interpretation of sedimentation and centrifugation experiments of biomolecules.