Vortexes in nanoparticles may be used in future electronic devices
An international group of researchers from Russia, the United States, China and Germany have discovered an unique feature of nanoparticles. The atomic vortexual displacement in a particle can change under the influence of an external electric field. The discovery could be the basis for the new electronic devices creation.
Scientists paid attention to the unusual atomic displacement in nanoparticles of barium titanate, that is called a topological vortex. There are no changes typical for materials with such defects, Dmitry Karpov, one of the authors of the study and an engineer of the Department of General Physics in the Tomsk Polytechnic University (TPU) explained. Three-dimensional organization of a crystal lattice is being changed. What`s interesting, similar changes exist only in the low-dimensional materials. For instance, in two-dimensional (2D) nanorods, nanofilms, nanodots and nanoparticles.
Scientists have detected changes in the particles` structure using images with 18 nanometers definition. Images were made at the synchrotron source in the Argonne National Laboratory (USA), the TPU press service told.
«According to the results of the study, there is a small displacement of all atoms in nanoparticles, that, at a distance view, has an expressive curl. In this case, the vortex`s core is a nanorod, that can be displaced or erased by the field and again restored inside the nanoparticles», Edwin Fohtung, Professor of the State University of New Mexico (USA) explained.
According to the TPU, the features of nanoparticles can be used in the future to create high-density storage devices or quantum computers.
This study involved scientists from the Harbin Institute of Technology (China) and Karlsruhe Institute of Technology (Germany). The results are published in Nature communication.
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