Materials Literature
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In order to study the influence of molecular structure features on their supramolecular organization in the floating layers and thin films 15 new meso-substituted tetraphenylporphine derivatives and their metal complexes with substitution in para- or ortho-positions (-OC 4 H 9 or -OC 16 H 33 ) were investigated. Metho…
Polymerous water-containing material based on the cross-linked polymerous hydrogel soaked in inorganic salt and put into the container made of polyamide films is designed. Frequency dependence on the reflectance coefficient of EMR is obtained in the range of 8.0…12.0 GHz at temperature range from minus 15 to plus 50 o…
Real magnetron resonator systems metrological expedients of the conformity observational estimate to the spatial harmonics spectrum fracture tolerance limits of a slowing down system high-frequency field are featured.
Simulation of the excitation of mechanical vibrations in carbon nanotube arrays by ponderomotive forces is presented in continual approximation on the basis of electrodynamics of moving bodies, elasticity theory and van der Waals interactions' theory.
This paper presents the results of studying the properties of a new class of nanostructured coatings obtained by the implantation with nitrogen ions in TiNi with a shape memory effect (SME).A comprehensive study of the mechanical and tribological properties showed a improvement in physical and mechanical properties of…
With the help of EPR-method the optical depth levels of photosensitive paramagnetic centers in ZnS:Al crystals had been determined.
The results of research of the morphological characteristics of nanostructured silicon are presented.
Graphene nano-ribbons (GNRs) are promising materials for applications in the field of nanotechnology, which requires detailed control of the material at the atomic level. Therefore, a detailed characterisation with atomic resolution is essential. Recently, the improvements of Electron Energy Loss Spectroscopy (EELS) t…
The function circuit of a device for measuring microwave radiations of non-thermal intensity is proposed. Its principle operation is based on the dependence of water resistance following the deep cleaning on intensity of electromagnetic radiations.
The features of uniform nickel electrochemical deposition into the pores of thin ordered porous anodic alumina (PA) are considered. The influence of deposition conditions on ordering and topological parameters of nickel nanopillars are investigated. The impact of the barrier layer thinning process at the PA pores bott…
Application of the modified point objective function taking into account mutual interference of radiators for optimization of the level of the side lobes of the directional pattern of antenna arrays has been considered. The procedure of optimization has been applied to the irregular antenna array out of the sub-arrays…
In present work a new concept of high porous metals structures formation is described, which is based on condensation of ion-sputtered substance near the thermodinamical equilibrium. We have analyzed advantages of the technological systems with self-organisation of critically small supersaturations of depositing fluxe…
Nowadays some synthetic methods of n-butyl acetate that use different catalysts such as inorganic salt (Ce(S2O8)2, FeNH4(SO4)2∙12H2O, LaSO4/SiO2, KHSO4 and SnCl4/C), HZSM-5, oxide (MoO3/SiO2), I2, heteropolyacid (H2(PW12O40)∙nH2O), quaternary ammonium salt ionic liquid and nanometer ZnO have been reviewed. The yields…
A method for measurement of electromagnetic radiation power of a microwave frequencies range passing through the material was developed. The testing of the developed technique on constructions of protective shields made from finely divided metal containing and carbon containing powders was performed. The calculation e…
Quasi-optical (QO) reflectometer of internal reflection (IR) on the basis of a hollow dielectric beamguide (HDB) and a number of beamguiding components and devices of THz frequency range is developed. The reflectometer is tested for detection of surface contaminations and sub-surface damages of carbon fiber reinforced…
It has been established that nickel condensates in the form of low-dimensional porous systems can be obtained at quasi-equilibrium steady state condensation. It has been shown that porosity formation occurs without coalescence upon reorientation of the condensed flux in the region of the initial cluster aggregation an…
The technology for manufacturing of composite materials on the basis of cement and shungite, which can be used as finishing materials for providing electromagnetic compatibility of electronic equipment, protect information from leaking via electromagnetic radiation channels. The study of the characteristics of shieldi…
Electron spin resonance (ESR) is a very useful and robust microwave spectroscopic method with many applications in science and technology. Common microwave sources used in ESR spectroscopy, such as klystrons or Gunn diodes have small bandwidth of ∼1GHz (at 10 GHz) and need to be locked on high-Q cavity (Q>1000) to ach…
suporte para células-tronco / Vanessa Camila Montanha ; orientador Sérgio Akinobu Yoshioka.São Carlos, 2012.
The RF MEMS microswitch technology on the basis of aluminum and anodic aluminum oxide as the working and sacrificial layers, respectively are considered. It is shown that the use of local anodization of aluminum eliminates the need for additional procedures of sacrificial layers formation. Due to the lack of high-temp…