Numerical and Experimental Studies of the Synthesis of Copper Nanoparticles in a High-Pressure Discharge

The paper describes a technique for the synthesis of microdiamonds, germanium nanoballs and nanotubes in an argon-germanium arc. The evaporation of germanium atoms was carried out from the surface of a graphite rod, which served as the anode of the arc discharge. The synthesis of microdiamonds was observed on graphite substrates near the anode; germanium nanotubes and germanium nanoballs were also found nearby. It has been established that germanium promotes the synthesis of nano and microdiamonds. Synthesized diamonds have a classic structure with rectangle faces and four hexagons adjacent to the edges of this rectangle. The sizes of microdiamonds reach tens of microns. The diameters of germanium nanotubes are of the order of 50-100 nm, and the length is of the order of 10 μm.

“…Low-temperature plasma can be used for the synthesis of various nanostructures and is well suited for the modification of various surfaces. This is shown in many works [10][11][12][13].…”

Section: Discussionmentioning

confidence: 67%

Synthesis of Microdiamonds and Germanium Nanotubes In the Argon-Germanium Arc

Тимеркаев

Abdullin

Suleimanov

et al. 2022

“…Low-temperature plasma can be used for the synthesis of various nanostructures and is well suited for the modification of various surfaces. This is shown in many works [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32].…”

Section: Discussionmentioning

confidence: 79%

Hysteresis Phenomena and the Effect of Reorientation in a Polymer-Liquid Crystal System Under the Influence of Laser Radiation and Uniaxial Deformation

Makhsudov

Fayzulloev

Egamov³

2022

The orientational structure in a polymer-liquid crystal thin film induced by uniaxial mechanical deformation has been studied. It is shown that the dependence of the deflection angle of the director of a nematic liquid crystal on the direction of the tensile force has a hysteresis region in which the orientation structure spontaneously changes from a state with positive torsion of the director to a state with negative torsion. It is established that the effect of modification of the hysteresis loop leads to an expansion of the hysteresis region and a decrease in the field at which orientation bistability appears.

“…Low-temperature plasma can be used for the synthesis of various nanostructures and is well suited for the modification of various surfaces. This is shown in many works [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Using Equation (1) Taking Into Account the Values Of Tablementioning

confidence: 70%

Effect of Silicon Fullerenes on Changes in the Heat Capacity of Nacl Electrolytes

Rajabova¹,

Tilloeva

Safarov

et al. 2022

The paper presents the results of an experimental study of the isobaric heat capacity of solutions of electrolytes of the water and NaCl system in the temperature range 288-373K. To measure the heat capacity of electrolytes, the method of monotonous heating was used (developed by Professor M.M.Safarov). The total relative error of measuring the heat capacity of this place with a confidence probability of 95% is on average equal to 3.8%. It is established that the specific isobaric heat capacity of electrolytes decreases with increasing temperature and concentration of sodium chlorine. The addition of fullerene leads to an increase in the heat capacity of solutions of the water and sodium chlorine system. On the basis of experimental data and the law of thermodynamic similarity, approximation dependences were obtained. Using the expressions obtained, it is possible to calculate the heat capacities of electrolytes at different temperatures and concentrations of fullerene nanoparticles.