Graphene on Rh(111): STM and AFM studies

The electronic and crystallographic structure of the graphene/Rh(111) moir\'e lattice is studied via combination of density-functional theory calculations and scanning tunneling and atomic force microscopy (STM and AFM). Whereas the principal contrast between hills and valleys observed in STM does not depend on the sign of applied bias voltage, the contrast in atomically resolved AFM images strongly depends on the frequency shift of the oscillating AFM tip. The obtained results demonstrate the perspectives of application atomic force microscopy/spectroscopy for the probing of the chemical contrast at the surface.Comment: manuscript and supplementary information; submitted to Appl. Phys. Lett. on 01.03.201

Structural and electronic properties of the graphene/Al/Ni(111) intercalation-like system

Decoupling of the graphene layer from the ferromagnetic substrate via intercalation of sp metal has recently been proposed as an effective way to realize single-layer graphene-based spin-filter. Here, the structural and electronic properties of the prototype system, graphene/Al/Ni(111), are investigated via combination of electron diffraction and spectroscopic methods. These studies are accompanied by state-of-the-art electronic structure calculations. The properties of this prospective Al-intercalation-like system and its possible implementations in future graphene-based devices are discussed.Comment: 20 pages, 8 figures, and supplementary materia

Electronic structure, imaging contrast and chemical reactivity of graphene moir\'e on metals

Realization of graphene moir\'e superstructures on the surface of 4d and 5d transition metals offers templates with periodically modulated electron density, which is responsible for a number of fascinating effects, including the formation of quantum dots and the site selective adsorption of organic molecules or metal clusters on graphene. Here, applying the combination of scanning probe microscopy/spectroscopy and the density functional theory calculations, we gain a profound insight into the electronic and topographic contributions to the imaging contrast of the epitaxial graphene/Ir(111) system. We show directly that in STM imaging the electronic contribution is prevailing compared to the topographic one. In the force microscopy and spectroscopy experiments we observe a variation of the interaction strength between the tip and high-symmetry places within the graphene moir\'e supercell, which determine the adsorption cites for molecules or metal clusters on graphene/Ir(111).Comment: submitted on Sep, 6th 201

Scanning tunneling and atomic force microscopies studies

The electronic and crystallographic structure of the graphene/Rh(111) moiré lattice is studied via combination of density-functional theory calculations and scanning tunneling and atomic force microscopy(STM and AFM). Whereas the principal contrast between hills and valleys observed in STM does not depend on the sign of applied bias voltage, the contrast in atomically resolved AFM images strongly depends on the frequency shift of the oscillating AFM tip. The obtained results demonstrate the perspectives of application atomic force microscopy/spectroscopy for the probing of the chemical contrast at the surface

Scientific rationale of ingredients choice for functional fish pastes

In recent years, the global demand for finished fish products is increased. Aquaculture raw materials are a rich source of nutrients for health. At the same time a large amount of fished fish raw materials are rejected and representing a losses. High-quality raw materials with technological defects are not in demand by the food production of fish products. Perishable substandard fish raw materials can be used in the production of combined fish products. The analysis of the fish catches global scale in the seas, oceans, farmed marine and freshwater aquaculture is carried out. An assessment of the market trends for the production and fish products consumption is made. This article provides an overview of targeted ingredient selection for balanced fish formulations. The characteristics of the most popular plant origin ingredients and their derivatives in the fish pates production are given. A comprehensive assessment of the biological, energy and nutritional value of plant products is given. Described technological approaches and production methods, the safety of vegetable ingredients. The results of research, technological solutions, substantiation of the choice of ingredients adopted by the developers for the formulations of multicomponent pate are summarized. The use of unclaimed raw materials, leftover fish meat with plant ingredients represents additional profit. Fish pate formulations are the basis for the production of complete, ready-to-eat products. Tests of multicomponent fish and vegetable products confirm their high performance. Pates, balanced in nutritional value, minerals, are a finished product that does not require additional preparation. The review article will generate awareness among the researchers, food technologists for the production of fish products and the general public

Induced magnetism of carbon atoms at the graphene/Ni(111) interface

We report an element-specific investigation of electronic and magnetic properties of the graphene/Ni(111) system. Using magnetic circular dichroism, the occurrence of an induced magnetic moment of the carbon atoms in the graphene layer aligned parallel to the Ni 3d magnetization is observed. We attribute this magnetic moment to the strong hybridization between C $\pi$ and Ni 3d valence band states. The net magnetic moment of carbon in the graphene layer is estimated to be in the range of $0.05-0.1 \mu_B$ per atom.Comment: 10 pages, 3 figure

Study of CeNi4Mn by neutron diffraction

We report neutron diffraction measurements on CeNi4Mn, which has recently been identified as a soft ferromagnet (Tc ~ 140 K) with a sizeable spin-transport polarization. Our data show conclusively that the Mn atoms occupy a unique site (4c) in the unit cell, which has the symmetry of the cubic MgCu4Sn-type structure. We infer a moment of 4.6 mu_B on Mn at 17 K, which is oriented ferromagnetically along the {101} plane. The amplitude of the Mn vibrational motion is found to be larger than that of Ce and Ni atoms at all temperatures, thereby lending support to theoretical prediction of rattling phonon modes in this compound.Comment: Accepted for publication in Solid State Commu

Impact of self-regulation methods on the psycho-emotional state of future teachers

The authors remark the necessity to develop the psycho-emotional self-assessment and self-regulation capability of future teachers during the period of vocational training at the university. The training program on the development of students' psycho-emotional self-regulation is presented. The possibility of training practice on behavior and activity self-regulation development as one of the phenomena of a person’s mental life is investigated via methods of questioning, operational control of neuropsychic activity (electrocutaneous resistance), and the Luscher tes