Abstract Submitted to the    NANOTUBE'04 Conference:

ABSTRACT
Paper, presented is an attempt to generalize, to analyse and suumarise, some recent publications - in a period of 1999-2003, devoted to investigation of different properties and the effect of chirality of carbon nanotubes. The work has been developed in some sections. Nanotechnologies and nanomaterials, are new era of nanoscince, has been pointed out into the introduction. Both types of carbon nanotubes have been considered- single walled carbon nanotubes (SWNT) and multi walled carbon nanotubes (MWNT). Regarding elastic behaviour of carbon nanotubes, it is found that Young's Modulus of MWNTs and SWNT are about 1.28 and 1.22 TPa. Considering some other mechanical properties - it must be mentioned, that these nanomaterials have as well high stiffness, high strength and good buckling resistance. Studies of optical properties, showed that carbon nanotubes could behave as metallic or semiconducting ones. Electrical transport properties (ballistic conductance, resistivity and maximum current density) have been analysed as well. SWNTs has been characterized, by the chiral vector(n,m) and at given chiral vector the diameter of carbon nanotube can be determined. In conclusion could be pointed out that the paper presented may be used as a good tool for investigation of carbon nanotubes for engineers, physists, chemists, scientists at all in advancement of nanotechnologies.