Materials Literature
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After carbon nanotubes synthesis in 1991, the interest to these objects is constantly increasing. However, till recently high-temperature evaporation of graphite in arc charge has been the only method of nanotubes synthesis. Significant success has been achieved in the frameworks of this method, but still there is nec…
Nanostructures of various shapes can be obtained either by the dispersion of a substance in a defi nite medium, or condensation or synthesis from lowmolecular chemical particles (Figure 3.1). Thus, the techniques for obtaining nanostructures can be classifi ed by the mechanism of their formation. Other features, by wh…
In every new field of knowledge specific notions and terms or “language” are created limiting and isolating this field. However, first existence boundaries of new notions and ideas corresponding to the above field of knowledge are determined.
Treatment Conditions ....................................................... 231 13.3 Results And Discussion ............................................................... 234 13.3.1 Synthesis of Hyperbranched Polymer .............................. 234 13.3.2 FTIR Spectroscopy Characterization........................…
The addition products of ethylene oxide to organic compounds have found applications in the processes of producing and processing polymers as surfactants (e.g., as emulsifiers of synthetic latexes), technological additives (to improve the operational characteristics of the epoxide and composite materials, decrease in…
Quaternary ammonium salts (QAS) as the main representatives of cationic surfactants are widely used in different branches of industry. However, they are practically not used in polymer processing, except vulcanization of the rubber [1]. Meanwhile, high surface activity, a variety of structure of hydrophobic radicals a…
The most plentiful organic substance in nature is cellulose, making up approximately one-third of the world’s vegetative matter. An estimated 1011 tons of cellulose is synthesized annually. Cellulose, hemicellulose, and lignins are the chief components of most land plants, providing structural support. Cellulose can b…
KH. SH. YAKH’YAEVA, G. V. KOZLOV, G. M. MAGOMEDOV, and G. E. ZAIKOV 2.1 The Temperature Dependence of Self-Adhesion Bonding Strength For Miscible Polymers .................................................... 24 2.1.1 Experimental ............................................................................... 24 2.1.2…
The main task of the present investigation is the establishment of the regularities of the formation of the energy spectra of electrons and the determination of the chemical bond between the atoms of protein and a modifier by X-ray photoelectron spectroscopy, which allows to define the direction in the investigation o…
The word gelatin is derived from the Latin verb gelare meaning “to congeal.” The circumstances surrounding gelatin’s discovery remain ambiguous. They are most likely related to the finding that boiling pieces of animal skin and bone produced a material that was fluid when hot, and solidified upon cooling. Extraction o…
Abstract : The objective of this research is to elucidate the interactions, mechanisms and chemistries of the spider silk producing process at the molecular level. Our primary focus is to characterize the protein-rich fluid in the major ampullate gland. We have been using a suite of magnetic resonance (NMR and MRI) sp…
Abstract : Metallic glasses are amorphous solids consisting of densely packed atoms. Unlike in crystalline solids where point defects and topological defects can be defined unambiguously such as vacancies and dislocations, the structural complexity of metallic glasses makes it rather difficult, for instance, to even d…
Dr. Jayaraman kandasamy has completed Master of Engineering (Aeronautical), at Department of Aeronautical Engineering, Madras Institute of Technology, Anna University, Chennai, India. He obtained his doctorate from Indian Institute of Technology, Madras, India, in the field of nano-particles production and characteriz…
International audience
In order to bridge AuNPs by material for molecular wires, appropriate chemical bonds are required. S-Au (thiolate) interaction is a widely used strong chemical bond for this purpose, e.g., self-assembled monolayers (SAMs) using alkanethiol compounds. Thiophenes that include sulfur in their structure also form weak bon…
EuTiO_3 is shown to exhibit novel strong spin-charge-lattice coupling deep in the paramagnetic phase. Its existence is evidenced by an, until now, unknown response of the paramagnetic susceptibility at temperatures exceeding the structural phase transition temperature T_S = 282K. The "extra" features in the susceptibi…
Cu/Ni/W nanolayered composites with individual layer thickness ranging from 5nm to 300nm were prepared by a magnetron sputtering system. Microstructures and strength of the nanolayered composites were investigated by using the nanoindentation method combined with theoretical analysis. Microstructure characterization r…
One of the most important design issues for phase change materials is to engineer the phase transition process. The challenge of accurately predicting a phase transition is estimating the true value of transition rate, which is determined by the saddle point with the minimum energy barrier between stable states on the…
Key words dendrimers - hydrogenation - nanocluster - olefins - platinum
Key words nickel nanoparticles - polystyrene-based copolymer - Corriu−Kumada−Tamao reaction