Vladimir Kukin - Academia.edu (original) (raw)

Papers by Vladimir Kukin

ChemPhysChem, 2019

The article proposes a new way for visualization of mesopores and quantitative evaluation of a po... more The article proposes a new way for visualization of mesopores and quantitative evaluation of a pore structure in a zeolite crystal. The developed approach is based on the formation of platinum tracking inside the zeolite material by the incorporation of platinum from a gaseous precursor using the scanning electron beam prior to preparing a TEM specimen by the focused ion beam technique. For demonstrating the ability of the approach the pores in mesoporous silica and purely microporous zeolite Y were visualized in TEM images. Finally, platinum tracking was used for studying the pore structure of zeolite Y (CBV 720) containing mesopores both inside the crystal and those emerging at its surface, which were unambiguously distinguished from each other. The obtained sizes of the mesopores and the calculated material porosity are in good agreement with the results found with the low-temperature argon sorption isotherms method.

SPIE Proceedings, 1992

Laser recrystalization on silicon dioxide polysilicon islands by pulsed laser radiation has been ... more Laser recrystalization on silicon dioxide polysilicon islands by pulsed laser radiation has been carried out. As a result of laser treatment single-crystalline layers have been produced which were investigated by means of translucent electron microscopy. It has been shown that the solution obtained for temperature distribution can be expressed via elliptical Jacoby sine. The n-channel metal-dielectric-semiconductor transistors with electric parameters

Nanotechnologies in Russia, 2011

The synthesis of nanocomposite carbon material with an ordered structure in a porous anodic alu m... more The synthesis of nanocomposite carbon material with an ordered structure in a porous anodic alu minum oxide template is considered. A template with a highly ordered structure provides the formation of an array of aligned carbon tubes with high aspect ratios (higher than 1000) in polycrystalline anodic aluminum oxide. The obtained material is studied using scanning and transmission electron microscopy, Raman scat tering spectroscopy, Auger electron spectroscopy, and infrared and X ray photoelectron spectroscopy.

Bulletin of the Russian Academy of Sciences: Physics, 2011

ABSTRACT We describe how to use a system with a focused ion beam and transmission electron micros... more ABSTRACT We describe how to use a system with a focused ion beam and transmission electron microscope to studying pyrocarbon and pyroboroncarbon. The advantages and disadvantages of different methods for producing thin foils by means of ion beams are demonstrated. It is shown that using a focused ion beam for the local preparation of samples allows us to find cavities in pyrocarbon materials and to establish the location of monocrystalline particles on their surfaces in pyroboroncarbon.

Bulletin of the Russian Academy of Sciences: Physics, 2013

ABSTRACT A study of the composition and structure of large single crystal inclusions formed insid... more ABSTRACT A study of the composition and structure of large single crystal inclusions formed inside cavities in pyroboroncarbon by means of energy dispersive X-ray microanalysis and electron diffraction analysis shows that they correspond to one phase of rhombohedral boron carbide. Bright-field images obtained by transmission electron microscopy show that their growth continues throughout the technological cycle of material growth due to the diffusion of boron atoms from the pyrocarbon phase of pyroboroncarbon adjacent to the cavities.

Technical Physics Letters, 2013

The focused ion beam technique is used for serial sectioning and visualizing 3D voids in pyrobo r... more The focused ion beam technique is used for serial sectioning and visualizing 3D voids in pyrobo roncarbon, measuring their volumes, and evaluating the local porosity of the material. Based on the results obtained, the error in determining the local porosity of pyroboroncarbon from the data of one section is found. With the use of serial cross sections, it is found that the porosity in the technological pyroboroncarbon crude product decreases in the course of its growth in vertical coaxial reactors.

Technical Physics Letters, 2004

Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques, 2011

ABSTRACT Carbon nanotubes grown on a silicon substrate with an array of FeNiCo20 catalyst islands... more ABSTRACT Carbon nanotubes grown on a silicon substrate with an array of FeNiCo20 catalyst islands are studied using focused ion beam and transmission electron microscopy. A method for preparing cross-sectional samples is proposed, which makes it possible to exclude the destructive effect of the ion beam on surface nanostructures during sample preparation using a microscopic three-dimensional protective barrier.

Semiconductors, 2008

ABSTRACT It is suggested to use the atomic-force microscopy (AFM) and transmission electron micro... more ABSTRACT It is suggested to use the atomic-force microscopy (AFM) and transmission electron microscopy (TEM) to study carbon material synthesized by catalytic pyrolysis of ethanol. It is shown how AFM and TEM can be employed to determine the geometric parameters of carbon nanofibers and nanotubes, examine their mechanical and adhesion characteristics, and analyze their structure.

Surface and Coatings Technology, 2014

Abstract PECVD method with subsequent photolithography process has been used to create different ... more Abstract PECVD method with subsequent photolithography process has been used to create different tailored surfaces of Fe/silica with silicon oxide representative to that formed during recrystallization annealing of Si alloyed steels, i.e. stoichiometric, amorphous and about 50 nm in thickness. The tailored surfaces have been characterized by different analytical techniques like XPS, AES, Raman, FIB-TEM, AFM and mechanical profilometry.