In 2011, researchers proposed that artificial guide stars could be used to measure the Earth's magnetic field in the mesosphere. An international group of scientists has recently managed to do this with a high degree of precision. The technique may also help to identify magnetic structures in the solid Earth's lithosphere, to monitor space weather, and to measure electrical currents in the part of the atmosphere called ionosphere.
A research team from ITMO University and the Australian National University has discovered that different metasurfaces exhibit the same behavior provided a symmetry breaking is introduced to their unit cells 'meta-atoms'. Asymmetry of meta-atoms results in high-quality (high Q) resonances in the transmittance spectra of metasurfaces. It opens the way to control an optical response, which is highly desirable for practical applications. The results of this research were published in Physical Review Letters.
Sabyasachi Kar from the Harbin Institute of Technology, China, and Yew Kam Ho from the Academia Sinica, Taipei, Taiwan, have now characterised the higher energy levels reached by electrons in resonance in three-particle systems, which are too complex to be described using simple equations. This theoretical model, published in a recent study in EPJ D, is intended to offer guidance for experimentalists interested in observing these resonant structures in positronium ions.
A team of multi-disciplinary scientists and engineers at the University of Illinois at Urbana-Champaign have discovered a new, more precise, method to create nanoscale-size electromechanical devices. Their research findings are published in Nature Communications.
New anti-thrombosis drug based on magnetite nanoparticles developed at ITMO University was successfully tested on animals. Preclinical studies showed drug's high efficacy and safety. Clot dissolution time of the new drug is 20 times shorter than the one of traditional medications. The range of permissible concentrations is very high, and the minimum dose of the active substance was a hundred times smaller than usual. The results are published in Applied Materials and Interfaces.
Researchers at the University of Waterloo have taken a huge step towards making smart devices that do not use batteries or require charging.
The international scientific team developed a new method for measuring the response of crystals on the electric field. The results a collaborative research done at the European Synchrotron Radiation Facility (ESRF) were published in the Journal of Applied Crystallography and appeared on the cover of the October issue.
A whiff of plasma, when combined with a nanosized catalyst, can cause chemical reactions to proceed faster, more selectively, at lower temperatures, or at lower voltages than without plasma. Using computer modeling, researchers investigated the interactions between plasmas and metal catalysts embedded into ceramic beads in a packed bed reactor. They discovered that together, the metals, beads and gas create plasma that intensifies electric fields and locally heats the catalyst, which can then accelerate reactions.
New materials are being synthesized by twisting and stacking atomically thin layers. To bring it all under one roof, physicists Nathaniel Gabor of UC Riverside, and Justin C. W. Song of Nanyang Technological University, Singapore, propose this field of research be called "electron quantum metamaterials." They have just published a perspective article in Nature Nanotechnology, in which they highlight the potential of engineering synthetic periodic arrays with feature sizes below the wavelength of an electron.
Scientists from ITMO University and Lebedev Physical Institute of the Russian Academy of Sciences proposed a new microwave antenna that creates a uniform magnetic field in large volume. It is capable for uniform and coherent addressing of the electronic spins of an ensemble of nanodiamond structure defects. This can be used to create super-sensitive magnetic field detectors of a new generation for magnetoencephalography in the study and diagnosis of epilepsy and other diseases. The results are published in JETP Letters.