Innovations of Leningrad Institutes and Enterprises

Saint Petersburg, Russia

Innovations of Leningrad Institutes and Enterprises

Saint Petersburg, Russia

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Alekseev N.I.,RAS Ioffe Physical - Technical Institute | Goncharov V.D.,Saint Petersburg State University | Charykov N.A.,Innovations of Leningrad Institutes and Enterprises
Physics of the Solid State | Year: 2010

The temperature dependences of the number of nucleating single-walled and few- nanotubes from catalytic particles supersaturated with carbon. It has been demonstrated that, initially, individual nanotubes nucleate and grow and, then, they can be joined together into bundles. The mechanism of the formation of bundles in the proposed model follows from the quantum-chemical analysis of the steady-state growth of nanotubes at the level of release of individual carbon atoms. During the growth, the axis of the nanotube rotates about the normal to the surface of the catalytic particle. This leads to the cross-linking of nanotubes into bundles. The characteristic diagram of the regions of the existence of individual single-walled, few-walled, and multiwalled nanotubes and their bundles has been constructed as a function of the temperature and the size of catalytic particles. © Pleiades Publishing, Ltd., 2010.


Semenov K.N.,Saint Petersburg State University | Charykov N.A.,Innovations of Leningrad Institutes and Enterprises | Letenko D.G.,Saint Petersburg State Polytechnic University | Nikitin V.A.,Saint Petersburg State Polytechnic University | And 3 more authors.
Protection of Metals and Physical Chemistry of Surfaces | Year: 2012

A significant increase in scuffing resistance and improving of the adhesion properties toward steel for anticorrosive acrylate priming enamel for ferrous materials VAK VD-AK-012PK modified with fullerenol-d synthesized by direct oxidizing fullerene C 60 is demonstrated. © Pleiades Publishing, Ltd., 2012.


Matuzenko M.Y.,Innovations of Leningrad Institutes and Enterprises | Semenov K.N.,Innovations of Leningrad Institutes and Enterprises | Tsvetkova L.V.,Innovations of Leningrad Institutes and Enterprises | Charykov N.A.,Innovations of Leningrad Institutes and Enterprises | And 3 more authors.
Protection of Metals and Physical Chemistry of Surfaces | Year: 2011

Methods for synthesizing and identifying water-soluble fullerenes (fullerenols) were developed. When used as additives to corrosive media, fullerenes exhibit weak catalytic activity towards electrochemical corrosion of aluminum and steel. On the contrary, after the treatment of aluminum and steel with aqueous solution of fullerenols, the rate of electrochemical corrosion (in 0.25 N solution of sulfuric acid) increases by a factor of almost ten. At the same time, the specific surface electric conductance of aluminum and steel decreases by ten orders of magnitude. Thus, the metallic surface acquires insulating properties. © 2011 Pleiades Publishing, Ltd.

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