Dymarchuk V. Electronic Structure of New Carbon Nanostructure Materials

The Thesis has been devoted to studies of the electronic structure of new carbon materials. These materials were obtained by means of method of organic compounds carbonization in oxide matrices as well as by carbon black shock compression method. Electronic structure of these materials was investigated for the first time. Received carbon-containing composite contains a mixture of different carbon materials. Organic compounds form layers on oxide matrices after carbonization. Chemical bond appears in the volume between the carbonization product layer and the matrix. Strength of this bond depends on matrix type as well as the chemical bond and it comparatively high in the case of using Al2O3 matrix. Considerable changes of energy distribution of C2p-states occur as a result of carbon black shock compression. The dense amorphous carbon phase synthesizes after carbon black shock compression. Experimental and theoretical investigation shows that sp2-hybridization is dominant in the dense amorphous carbon phase. An increase of number of three-type coordinated atoms (sp2-hybridization) leads to level transformation to wide band and to disappearing the semiconductor gap in the dense amorphous carbon phase.