By irradiating an electron beam carbon, Russian researchers haveoriginal morphology of the nanoparticles. The relative ease of synthesis and availability of raw materials make this method attractive for industrial use.
Currently, physicists and chemists actively publishing in the field of nanostructured carbon materials, in particular carbon nanotubes, Fullerenes andGraphene. They are somewhat similar. If we take a tube graphene — a monolayer of carbon atoms — we get a carbon nanotube, and if we add the monolayer into the sphere — that of fullerene.
These three materials are predicting a bright future in science and industry, not for nothing that in 1996 and 2010, the pioneers in the study of fullerenes and graphene were awarded the Nobel Prize.
However, in addition to the above, the widely publicized carbon structures, there are others such as nanoglobuly, nanofibers, nanodiamonds, nanolukovitsy. All of them are already being used in various industries. For example, nanolukovitsy which are nested carbon spheres serve as a good lubricant and nanodiamonds widely used in polishing compositions and wear resistant coatings. It is difficult to say how much more you can create a variety of nanostructured carbon materials and what they will open the prospect before us, but research in this direction is very relevant.
Interesting new carbon structure researchers synthesized Omsk Scientific Center of the Russian Academy of Sciences, the Institute of High Current Electronics, Russian Academy of Sciences and the Institute of Hydrocarbon Processing SB RAS.
To this end, scientists put carbon (soot) in the graphite crucible and its copper covering diaphragm with a small opening. Then, the crucible was placed in a vacuum chamber in which the electron beam bombardment of the soot through the opening in the diaphragm. As a result of this weight reduction was observed starting powder in a crucible and depositing copper on carbon diaphragm. Using Electron Microscopy Researchers have studied the precipitated fraction and residual carbon, and found that irradiation is a structural rearrangement of carbon black, which is formed byinteresting morphology of nanoparticles, something resembling a slice of rosebud.
It can be assumed that shown "Rose-like" particles not differ from the carbon bulbs. However, this is not the case in the past carbon spheres closed and inserted into each other, just as arranged doll. In the case of the synthetic particles, we see that it has no clear concentric spheres, and there is only the broken graphene layers arranged in a circle.
Scientists are still looking for the possible application of the synthesized material. According to their hypothesis,
resulting structures can be of interest for further adjustment and in particular for the production of nanodiamonds. A widely used method of creating a detonation diamond structures are dangerous in some way, which is why the search for more benign synthetic methods.
This work was supported by grant RFBR Project Program of the Presidium of RAS number 27 and the integration project of SB RAS № 43
Source of information:
G. Kryazhev, NN Koval, VA Likholobov, AD Teresov, VA Drozdov, MV Trenihin Structural transformation nanoglobulyarnogo carbon under a pulsed electron beam with high energy density. -Letters to the Journal of Applied Physics. — 2012. — Volume 38. — MY. 7.