The cover describes the development of nanofibers with encapsulated growth factors has been emerged as a promising approach in neo-tissues applications. The proposed nanofibrous systems provide a novel approach to both simulate the extra-cellular matrix for cell adhesion and also for localized delivery of signaling molecules and growth factors. Growth factors could be loaded into nanofibers using different techniques including physical adsorption, covalent bonding or encapsulation.
Surface reinforcement of metals by carbon nanomaterials followed by high intense energy irradiation
Institute of Thermal and Atomic energy, National Research University, “Moscow Power Engineering Institute”,14 Krasnokazarmennaya st., 111250, Moscow. Russia
Adv. Mater. Lett., 2018, 9 (10), pp 733-736
Publication Date (Web): Jul 18, 2018
Copyright © IAAM-VBRI Press
The metal surface modification by carbon nanostructures followed by high intense treatment has been realized. As carbon nanostructures were used: carbon soot formed in an arc discharge with graphite electrodes remained after extraction of fullerenes; fullerene C60; partially reduced graphene oxide. An intense pulsed laser and electron beam accelerator were used as high intense energy sources. Measurements performed indicate that the above described processing of the steel surface results in a considerable enhancement of the microhardness (up to 800%) and a notable decrease (up to 50%) in the friction coefficient. The degree of reinforcement depends on both the type of nanocarbon and the source of energy. The maximum effect of reinforcement is reached for fullerene C60 coverage and laser irradiation. The dependence of the microhardness of the treated surface on the irradiation energy has a non-monotone character reaching the maximum value of about 200 J/cm2 at the laser irradiation and 400 J/cm2 at the e-beam irradiation.
Metal surface reinforcement, carbon nanostructures, fullerenes.