The percentage of large particles in the water suspension of diamond nanoparticles to a large extent determines the potential of using these suspensions in technology and medicine. It is demonstrated that there is an error in determining the percentage of large diamond nanoparticles in water suspensions using the dynamic light scattering (DLS) method to measure the size distribution of the particles. A method for labeling these suspensions based on supplementing the DLS measurements with recording of an optical spectrum in the visible region is proposed. The labeling allows one to perform more reliable determination of the percentage of large particles in a suspension.

The size and location of the area of gas breakdown at the surface of an M(GD)SM structure based on a bismuth silicate crystal was studied under uniform illumination conditions. The amount of energy absorbed in the crystal that leads to breakdown of the gas layer is determined.

Mutual diffusion at the interface in a two-dimensional Ni-Al system has been studied by the method of molecular dynamics. It is established that the main diffusion mechanism consists in correlated jumps of atoms over the vacancies near misfit dislocation cores.

The incidence of two particles onto a thin solid plate has been studied by means of computer simulation. The influence of the impact-excited waves on the particle-surface interaction is considered. The waves excited in the target plate produce a significant change in the surface response dynamics. The distribution of surface damage and plastic strain generated by the incident particles is analyzed, and it is established that this distribution is correlated with the surface wave structure.

A new method is proposed and verified according to which the efficiency of remote gas sampling by means of a swirling air jet is improved through matching the probing and sampling vortex fluxes. It is shown that, under the conditions of matching (with the probing/additional flux ratio of 1.3), a counter flow with a minimum diameter of the vortex core is formed that minimizes the sample losses while retaining high rarefaction at the probed object surface.

It has been established that the field electron emission from an amorphous carbon film containing graphite nanoclusters exhibits inversion upon the adsorption of cesium atoms on the sample surface. The phenomenon consists in the disappearance of electron emission from graphite nanoclusters, which were the local emission centers prior to the metal adsorption, and the appearance of homogeneous emission from the amorphous carbon surface not emitting before that. The observed effect is explained using notions of the surface diffusion of cesium in an inhomogeneous electric field, cesium intercalation into graphite nanoclusters, and the related reversal of the dipole moment upon a change in the electric field direction.

A method for reconstructing model delay-differential equations for the chains of coupled delay-feedback systems from their time series is described for the first time. The efficacy of the proposed method is demonstrated by an analysis of the chaotic time series for the chains of both unidirectionally and mutually coupled time-delay systems described by the Ikeda equations and the Mackay-Glass equations with high noise levels.

A force acting on a nanoparticle occurring in a fluid has been studied by the molecular dynamics method. It is shown that this force is nonstationary and exhibits a relaxation character. At the initial instant, it is two to three times the Stokes force, but then decreases and, outside the first relaxation region, becomes smaller than the Stokes force. A stationary force acting on a nanoparticle is determined by the particle mass and size. Correlation expressions for determining the drag coefficient are constructed. It is established that the drag force is anisotropic.

A one-dimensional simulation of the nonlinear diffusion of magnetic field through a shield made of the solid solution (V_1−XCr_X)₂O₃ is carried out. Also simulated is the current switching from this shield to load when the former undergoes a metal-insulator transition. Pronounced steepening of a current pulse edge in the load circuit is demonstrated to be possible.