The issue contains the article of Zhigalina et al. in which Bimetallic structures–Pt nanoparticles distributed on the surface of a Pd catalyst on Vulcan XC_72 soot–have been investigated. Several series of bimetallic catalysts with various contents of platinum have been obtained by pulsed electrochemical deposition. Their structure is studied using analytical high resolution transmission electron microscopy with a correction of aberrations. The data allows us to present a scheme of evolution in the bimetallic catalyst structure caused by a change in the ratio of metals Pt : Pd. For the ratio Pt : Pd = 1 : 25, the electrochemical measurements of catalytic activity have shown an extremely high current of oxygen reduction.
Forming an ordered surface layer is possible together with the formation of Janus nanoparticles in the chemical modification of the surface of silver colloids. This is achieved via sorption of nanoparticles on the surface of chemically modified silica grafted with amine, followed by sequential treatment with modifier solutions and desorption of the final product. As a result of such synthetic procedure, a chemical modification of nanoparticles on different sites is possible with two compounds, as shown in the study of A.Olenin et al.
Combined and separate influence of ultrasound and DMSO on the transport of a gold nanoshell suspension in intact and injured skin is studied in the article of E.Genina et al. A comparative analysis based on optical coherence tomography and histochemical analysis data is presented. Experimental allergic contact dermatitis was used to model injury to the stratum corneum during various pathological changes in the skin. The studies were performed on outbred laboratory rats. It is shown that the best method for enhancing transdermal transport of an immersion liquid is multimodal physical and chemical impact (a combination of DMSO and ultrasonophoresis); the effectiveness of optical clearing of the dermis both in the presence and absence of the stratum corneum is approximately the same. To enhance the transport of nanoparticles into the skin when it undergoes pathological changes related to injuries of the protective barrier, exposure to ultrasound is sufficient.
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«Nanotechnologies in Russia» journal is edited with support of the Federal Target Program for Research and Development in Priority Areas of Development of the Russian Scientific and Technological for 2014–2020".