The present work is dedicated to the development of formation and diagnostics methods of water colloids of noble metals (Au, Au, Pt). As anoble nanoparticles formation method, the laser synthesis at air conditions is proposed. By the implantation of noble nanoparticles into water media, the colloidal systems of noble metals can be obtained. For the aims of investigation of noble colloid parameters, the complex diagnostics method is used. Such approach deals with direct methods (scanning electron microscopy and the characteristic radiation registration) and indirect methods (absorption spectroscopy and extinction modeling by Mie theory). 1. Introduction Currently, nanotechnologies and nanoengineering are one of the most promising directions in the development of modern science. Great practical interest to nanoobjects is caused by the presence of a number of specific properties corresponding to them (physical, chemical, biological), which are not peculiar to massive objects, consisting of the same material. This, for example, allows to modify the traditional media by metal nanostructures, thereby gaining strength, durability, abrasion resistance, and so forth. Now there are many industrial technologies of metal nanoparticles production. All of them can be divided into the following groups of methods: elementary wet lab (subsidence, revivification), synthesis of gaseous and solid phases, chemical methods of homogenization, the methods based on the use of one- and two-dimensional reactors, methods based on such phenomena as self-organization and self-assembly, as well as various types of lithography [1]. All of the above-said methods of formation of metal nanoparticles have their own advantages and disadvantages and can be used to solve certain technological problems. As an example of one of such tasks, the receiving of colloid solutions of noble metals nanoparticles can be mentioned. These colloids are widely used for the needs of petrochemistry, organic chemistry, polymer chemistry, as well as in light industry [2]. Fundamental features of noble metals (such as inertia, relative refractoriness, and high specific density) do not allow the proper use of all the above-said methods of synthesis. As one of the promising methods for formation of noble metals colloids, the method of laser synthesis at air can be applied. The main advantages of this technology are simplicity of technical implementation, an opportunity to perform operational control over the synthesis process, and a relatively short acquisition time for the formation of collids. The essence of
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