Low-Frequency Noises in MWCNT Films Deposited by the PLD Method

The results of the study of excess noise in flat arrays of multi-walled carbon nanotube (MWCNT) are presented. Thin films of nanocarbon were obtained by pulsed laser deposition (PLD). PLD is a process in which laser radiation is used to “punch” carbon materials from the surface layers of a target and deposit them on a substrate to form stoichiometric single and multilayer coatings with special properties. A neodymium KGd(WO4)2 laser was used in the experiment. The excess noise was observed to be a superposition of the 1/f-like noise and the Lorentzian noise components of the recombination generation. The activation energies of the Lorentzian components and the distribution of the activation energies responsible for the 1/f noise were calculated from the measured temperature dependence of the noise.