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We received and compared the current-voltage characteristics of large-area field emitters based on nanocomposites with graphene and nanotubes. The characteristics were measured in two high voltage scanning modes: the “slow” and the “fast”. Correlation between two types of hysteresis observed in these regimes was determined. Conditions for transition from “reverse” hysteresis to the “direct” one were...
Single-walled carbon nanotubes are treated as systems with strong correlations due to a strong Coulomb interaction between π-electrons at one site. The energy spectrum of such a system is shown to be divided into two Hubbard subbands. Due to this restructuring the rule of multiplicity of three, according to which a nanotube has a metallic conductivity if the difference between the chiral indices is...
We received and compared the current-voltage characteristics (IVC) of the multi-tip field nanocomposite emitters in the slow and the fast high voltage scanning modes. We found two types of hysteresis on the emission characteristics plots in the same field experiment. The study of IVC form depending on the duration and amplitude of the scanning voltage was carried out.
Development of a unique computerized technique based on our program written by LabVIEW 2013 permitted us to register fluctuations of microscopic emission parameters of flat multiple-point cathodes and associate them with a statistical distribution of nanotube effective heights. Numerical estimates by Pearson show that this statistic is subject to lognormal distribution. In present work the influence...
Structure stability of a multiwall carbon nanotube - polystyrene nanocomposite was investigated in two operational modes. Statistical analysis of the emission parameters of the whiskers formed on the anode surface during field emission was carried out. The histograms of the statistical distribution of effective heights at different current levels were plotted. Mass-spectrometry data in alternating...
In this paper, VCC registration and polymer-multiwalled carbon nanotube (MWCNT) composite emitter material thermal destruction during emitting process were investigated. This paper was focused on the so called emission point temperature which was related to thermal degradation for neighboring polymer molecules around CNT. Time of flight mass spectroscopy (TOF-MS) and field emission process were involved...
In order to detect L-glutamate, we immobilized L-glutamate oxidase (GLOD) on the probe-type carbon nanotube (CNT) network junctions by a non-covalent functionalized method to preserve their electronic characteristics. After immobilizing GLOD on the CNT network, the excess reactive groups of linker molecule remaining on its surface were deactivated and blocked by ethanolamine. The electrical property...
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