Author(s)

Kh. A. Abdullin, D. G. Batryshev, Y. V. Chikhray, M. T. Gabdullin, D. V. Ismailov, A. K. Togambaeva

Al-Farabi KazNU, Institute of Experimental and Theoretical Physics, al-Farabi Str, Almaty, Kazakhstan.
Al-Farabi KazNU, National Nanotechnological Laboratory of Opened Type, al-Farabi Str, Almaty, Kazakhstan.

CVD synthesis of carbon nanotubes was carried out using ethanol paralysis in tubular quartz reactor at atmospheric pressure of hydrogen. Ni, Co and Fe catalyst were used for CNT deposition. The CNT samples obtained under various experimental conditions were studied by scanning electron microscopy (SEM), X-ray fluorescent microanalysis and Raman spectroscopy. The ratio of I_D/I_G of D (~1360 cm^-1) and G (~1580 cm^-1) Raman peaks was monitored to estimate the crystalline of graphite-like material. The optimal conditions for synthesis of CNTs on the Si-substrates and on the SiO₂-based fiberglass were determined. MWNT were produced with 25-30 nm diameters, up to 30 microns in length and with crystallite size L_a from 2.7 nm to 7 nm. DC electrical properties of carbon composites MWNT/SiO₂-fiberglass were examined. Specific resistance was about 10 cm and more depending on CNT content. It was found that the resistivity of the carbon composites MWNT/SiO₂ is sensitive to external pressure. Processing of composite with binding polymer significantly improves stability and repeatability of its voltage-current characteristics.

Carbon Nanotubes (CNT); Chemical Vapor Deposition (CVD); Scanning Electron Microscopy (SEM); Raman Spectroscopy

K. A. Abdullin, D. G. Batryshev, Y. V. Chikhray, M. T. Gabdullin, D. V. Ismailov and A. K. Togambaeva, "Gas-phase Synthesis of Carbon Nanostructures and Composites," Open Journal of Microphysics, Vol. 3 No. 3B, 2013, pp. 1-4. doi: 10.4236/ojm.2013.33B001.