Modifikace diamantového nanoprášku pomocí magnetronového PACVD procesu
Title Alternative:Modification of Diamond Nanopowders By The MW PACVD Rotary Reactor Chamber
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Date
2015
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Technická Univerzita v Liberci
Abstract
Modern technologies, used in material engineering, are the source of modern biomaterials. At present, there is observed a significant increase in the interest of plasma chemical methods of nanodiamond modification thanks to which it gains new spectacular properties. This dissertation concerns the modification of diamond powders (DPP - diamond powders particles) in order to achieve the specific physical and chemical properties that would be beneficial for various applications in biomedical engineering. That was the reason why the innovative MW PACVD rotary reactor chamber (MW PACVD - Microwave Plasma Activated Chemical Vapour Deposition) was designed and constructed. The material modified in the reactor chamber was tested for potential applications. The initial phase of work was focused mainly on the construction of the system MW PACVD equipped with a rotary drum. It dealt with a number of solutions commonly used in this field, both in science and in industry. Definitively established main concept fulfilling the basic assumptions, which are in effect, been fully realized. The next step was to carry out the modification process of diamond nanopowders using a system constructed MW PACVD + R. The completion of the process was preceded by a series of test trials and the work starts control and calibration. Yield was satisfactory output at a relatively stable plasma generation MW. The next stage of the study was a comparative analysis of carbon materials (detonation diamond nanopowders) undergoing surface modification using the present system of unmodified materials. They conducted a study into Raman spectroscopy, and FTIR. The results indicated a noticeable difference in the analyzed waveform which could indicate a malfunction of the system (expected noticeable change). However, only biological research shed new light on the issue. It turned out that in vivo studies of human hemoglobin modified in the reporting system, the detonation diamond nanopowder shows different of reference materials, good biological properties. The high degree of biocompatibility indicates practically negligible negative effect on the hemoglobin as shown in image. It can be assumed that used to analyze the conventional method (Raman and FTIR) are methods which are able to detect subtle changes which clearly indicate the biological tests. The paper presents results of research on plasma-detonation modification of nanopowders diamond implemented in the author's reactor design MW PACVD + R and the impact of these modifications on their biological properties.
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116 s.