Electroless deposition and Electroplating of Metals

The present paper summarizes the main results of the research on the electroless and electrochemical metal deposition from aqueous solutions, which has been carried out in the Research Institute of Physical-Chemical problems of the Belarussian State University and at the Department of Inorganic Chemistry of the BSU for the last three decades. The paper covers the following problems: the main peculiarities of electroless and electrochemical deposition of copper, nickel, Ni-B,Ni-P, gold films 0.1-30 mkm and more in thickness, their phase composition, morphology and properties; the characteristic features of of hydrometallurgic allowing (e.g. electroless and electrochemical deposition of a number of binary alloy coatings such as Cu-Ni, Cu-Cd, Cu-Sn, Cu-Zn, Ni-Sn, Ni-W, Ni-Mo), methods of their chemical and phase composition and microstructure regulation, together with correlation between these parameters and alloy properties; the methods for composite metal and alloy film plating from solutions with production of materials including metal oxides and thus possessing unusual and useful properties; the peculiarities of metal film plating onto dielectrics with production of continuous films and metal conductive patterns without the use of photoresists

Some ways of filling of the vascular bed of domestic animals

In this work the assessment of some methods of filling of the mammals blood channels is presented. As injection masses there were used the gelatine solution of 5%, painted with the ink by Borisevich V.B. technique and the solution consisting of Bustilat-M glue and the water in a proportion of 2:1. The conducted researches showed that the most successful, in terms of simplicity of execution, is filling of vessels with the solution consisting of Bustilat-M glue and water, as it allows with the little effort and with the smallest expenses to fill in both large and average vessel

Biological resources of natural forage grassland of the cretaceous south of the European Russia

The main objective of the made researches was assessment of territorial confinedness of economic and valuable plant species and also a status and productivity of a natural forage grassland within agrolandscapes of the cretaceous South of the European Russia (the territory of the Belgorod region). Biological and vegetable resources of the natural forage grasslands of the East part of the Belgorod region in a subband of the southern forest-steppe were studie

Электрохимическое осаждение сплава Au-Sn из этиленгликолевых электролитов

Stable ethylene glycol and aqua-ethylene glycol electrolytes on the base of K[Au(CN)2] and SnCl4 for the electrochemical deposition of Au-Sn alloy with metals ratio and phase composition appropriated to the low-melt eutectic (Au - 70 at.%, Sn -30 at.%, Au5Sn, AuSn) have been elaborated. The role of electrolytes components in the redox processes proceeding on the cathode and anode and their on the rate of deposition and Au : Sn ratio in the alloy have been developed. Composition and structure of Au-Sn alloy coatings have been investigated.Разработаны стабильные этиленгликолевый и водно-этиленгликолевый электролиты на основе K[Au(CN)4] и SnCl4 • 5H2O, обеспечивающие электрохимическое осаждение сплава Au-Sn с соотношением металлов и фазовым составом, соответствующими легкоплавкой эвтектике в системе золото - олово (Au 70%; Sn 30%, Au5Sn, AuSn). Выяснено влияние компонентов электролита на закономерности протекания окислительно-восстановительных процессов на электродах, скорость роста покрытий, их состав и микроструктуру

Электрохимическое осаждение сплава Au-Sn из этиленгликолевых электролитов

Stable ethylene glycol and aqua-ethylene glycol electrolytes on the base of K[Au(CN)2] and SnCl4 for the electrochemical deposition of Au-Sn alloy with metals ratio and phase composition appropriated to the low-melt eutectic (Au - 70 at.%, Sn -30 at.%, Au5Sn, AuSn) have been elaborated. The role of electrolytes components in the redox processes proceeding on the cathode and anode and their on the rate of deposition and Au : Sn ratio in the alloy have been developed. Composition and structure of Au-Sn alloy coatings have been investigated.Разработаны стабильные этиленгликолевый и водно-этиленгликолевый электролиты на основе K[Au(CN)4] и SnCl4 • 5H2O, обеспечивающие электрохимическое осаждение сплава Au-Sn с соотношением металлов и фазовым составом, соответствующими легкоплавкой эвтектике в системе золото - олово (Au 70%; Sn 30%, Au5Sn, AuSn). Выяснено влияние компонентов электролита на закономерности протекания окислительно-восстановительных процессов на электродах, скорость роста покрытий, их состав и микроструктуру

Robust Phase Behavior of Model Transient networks

In order to study the viscoelastic properties of certain complex fluids which are described in terms of a multiconnected transient network we have developed a convenient model system composed of microemulsion droplets linked by telechelic polymers. The phase behavior of such systems has two characteristic features: a large monophasic region which consists of two sub-regions (a fluid sol phase and a viscoelastic gel phase) separated by a percolation line and a two phase region at low volume fraction with separation into a dilute sol phase and a concentrated gel phase. From the plausible origin of these features we expect them to be very similar in different systems. We describe here the phase behavior of four different systems we prepared in order to vary the time scale of the dynamical response of the transient network; they consist of the combination of two oil(decane) in water microemulsions differing by the stabilizing surfactant monolayer (Cetyl pyridinium chloride/octanol or TX100/TX35) and of two telechelic polymers which are end-grafted poly (ethylene oxide) chains, differing by the end-grafted hydrophobic aliphatic chains (C12H25 or C18H37).Comment: April 9 200