Vapor phase synthesis of ZnO structures

We observed zinc oxide structures formed in an oxygen-containing atmosphere as a result of oxidation of the surface of zinc droplets. The gas-phase oxidation leads to the formation of hollow ZnO whiskers on the metal surface, which grow due to the transport of zinc vapor through their channels. It was found that high partial pressures of zinc and atomic oxygen give rise to fractal structures, which appear in a cascade process involving the sequential formation of zinc oxide vapor, ZnO clusters, and cluster aggregates as a result of the cluster-cluster interaction. A deposit of ZnO synthesized on the cathode surface exhibits a columnar structure.     

Features of the photoconductivity of iodine-doped cotton fibers illuminated in the fundamental absorption range

The photoelectric properties of cotton fibers treated with iodine were studied in the fundamental absorption range. The samples exhibit a sublinear illumination-current characteristic and a long-term relaxation of photoconductivity (PC) after UV irradiation (hν=5 eV) of the iodine-doped fibers. A PC mechanism is proposed which explains both the nonlinear variation of photocurrent with illumination intensity and the PC decay according to a bimolecular recombination law after UV irradiation of the iodine-doped fiber in the fundamental absorption range.     

Test of the KÉ-250-ShS machine for twisting acetate yarn

Conclusions An attempt has been made to use the KÉ-250-ShS machine for twisting acetate yarns.It has been found that in developing a new twisting machine it is advisable to use a checkerboard disposition of the spindles in its lower part with the objective of reducing the noise level, and also to use pedal braking to stop the spindles. This helps increase the productivity of twister labor, and mechanization and automation of operations associated with transfer in removing packages of weight not less than 3 kg.Translated from Khimicheskie Volokna, No. 6, pp. 40–41, November–December, 1985.     

Effect of preliminary radiation-oxidation treatment on electrophysical properties of zirconium

The effect of preliminary radiation-oxidation treatment on the current density and on the current-voltage characteristic of zirconium is studied. The contribution of the preliminary radiation-oxidation treatment to the change in the electrophysical characteristics is determined in heat and radiation-and-heat tests of zirconium in contact with water.     

Realization of high pressures and temperatures in the gas phase of a bubble liquid flowing through a nozzle

A steady flow of a bubble gas-liquid mixture in a nozzle having a circular cross section has been investigated. The possibility of realization of superhigh temperatures and pressures in the gas phase of the mixture in the region near the smallest cross section of the nozzle has been analyzed. The influence of the initial radius of the flow and the volume content of bubbles, determining the volumetric rate of flow of the liquid supplied to the nozzle, on the pattern of the flow has been considered. __________ Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 80, No. 6, pp. 134–137, November–December, 2007.     

Removing cesium radionuclides from sodium-potassium coolant

Translated from Atomnaya Énergiya, Vol. 66, No. 1., pp. 22–24, January, 1989.     

Method of monitoring the shape of an atomic force (tunneling) microscope tip using backscattering spectrometry

A method is proposed to monitor the shape of an atomic force microscope tip, which can combine the operations of ion etching and shape monitoring, by using the intensity of the backscattering of ions from the same or a different beam to monitor the shape. Relationships have been obtained to monitor the shape of the probe using the measured dependence of the backscattering intensity on the parameters of the incident beam. Pis’ma Zh. Tekh. Fiz. 23, 88–92 (June 12, 1997)