Persons

The electronic properties of carbon nanotubes with the controlled chirality indexes have been studied. Via the DFT LSDA method using the Gaussian 03W and TubeGen software it has been found that semiconducting SWCNTs of small diameters (about 0.3 - 2 nm) have nonmonotonic oscillating character of their band gap dependence on the diameter. The nonmonotonic oscillating change of the band gap width, related to small magnitudes of the chirality indexes defining the SWCNTs symmetry and curvature, has been revealed. For very small diameters of chiralities (0, 4), (0, 5) the degeneration of the band structure leading to metallic properties and violation of the so-called '3K' rule has been found.

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The issues of creating the schemes of the quartz generators (QG), intended for implementation in CMOS 0.18 micron technology, have been considered. The options of the QG circuit design with low noise, which are tolerant to 2xVDD voltage, have been offered. Based on the analysis of the nature of the automatic gain control of CMOS inverters the time minimization of the QG exit to the operating mode has been carried out.

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