Nanotechnology of DNA/NANO-Si and DNA/Carbon Nanotubes/Nano-Si Chips

DNA nanotechnology using DNA molecular assembly for the formation of the nanosystems from DNA and nanotubes in chip on the silicon surface, has been developed on the base of theoretical predictions of chemical activity changing of SWCNT's, nano-Si's under their localization into the biopolymer surrounding. We report the direct investigation by AFM of DNA assembled on the surface porous Si with nano - Si system, UV-vis and IR spectroscopic study of partially unwrapped double helix DNA molecules with carbon nanotubes, which spontaneously self-assembled into blocks consisting of DNA molecule and carbon nanotube. The shift of absorption peak on 5,8 nm and the raised absorption in the presence of carbon nanotubes are testified about the change of hydrogen bonds between the bases of DNA molecules in the layer with carbon nanotubes. Both the decrease of the wavenumber of N-H...N, N-H...O groups on 12 cm(-1) and the absence of C-CH3 group vibrational mode at 1440 cm(-1) in IR transmittance spectra from DNA/nanotubes layer are indicative of their self - assembly formation. The electronic and photoelectronic properties of the formed nanosystems under the change of DNA/SWCNT molecular and DNA/nanocrystalline-Si (nano-Si) networks by DNA modification in the chips have been studied.