The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
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...
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.
The advanced technique of current-voltage characteristic (IVC) on-line processing and recording was developed. It allows to observe and evaluate statistical dependences of the emission centers for nanostructured field emitters. Statistics and IVCs of the samples with different nanotubes length and radius were compared. The emitter based on carbon films modified by high-voltage vacuum discharge was...
An experimental apparatus and a LabView-based software suite for real-time research on field emission were developed. The current-voltage characteristics of field emitters based on carbon nanotube/polymer nanocomposite were observed and analyzed using a simple quantitative test for lack of conformity with classical field emission theory.
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...
We created a unique instrument for research of multi-tip field emitters. It allows to record the current-voltage characteristics of the emitter, to derive the various microscopic emission parameters from IVC in online regime and to register volatile products evolved from the emitter surface.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.