von Gratowski, S.V.; Kosakowski, Z.Y.; Koledov, V.V.; Shavrov, V.G.; Smolovich, A.M.; Orlov, A.P.; Denisjuk, R.N.; Wang, C.; Liang, J. Structural Inhomogeneities and Nonlinear Phenomena in Charge Transfer under Cold Field Emission in Individual Closed Carbon Nanotubes. Micro2023, 3, 941-954.
von Gratowski, S.V.; Kosakowski, Z.Y.; Koledov, V.V.; Shavrov, V.G.; Smolovich, A.M.; Orlov, A.P.; Denisjuk, R.N.; Wang, C.; Liang, J. Structural Inhomogeneities and Nonlinear Phenomena in Charge Transfer under Cold Field Emission in Individual Closed Carbon Nanotubes. Micro 2023, 3, 941-954.
von Gratowski, S.V.; Kosakowski, Z.Y.; Koledov, V.V.; Shavrov, V.G.; Smolovich, A.M.; Orlov, A.P.; Denisjuk, R.N.; Wang, C.; Liang, J. Structural Inhomogeneities and Nonlinear Phenomena in Charge Transfer under Cold Field Emission in Individual Closed Carbon Nanotubes. Micro2023, 3, 941-954.
von Gratowski, S.V.; Kosakowski, Z.Y.; Koledov, V.V.; Shavrov, V.G.; Smolovich, A.M.; Orlov, A.P.; Denisjuk, R.N.; Wang, C.; Liang, J. Structural Inhomogeneities and Nonlinear Phenomena in Charge Transfer under Cold Field Emission in Individual Closed Carbon Nanotubes. Micro 2023, 3, 941-954.
Abstract
The structure and phenomena arising from charge transfer in cold field emission modus in a single closed carbon nanotube under cold field emission conditions were studied. By studying microphotographs in various microscopes - AFM, SEM, TEM it was found inhomogeneities in the form of two types of superlattices. The conductivity of the emitter section of a nanodiode circuit with an emitter made of an individual closed carbon nanotube (CNT) and arrays of closed CNTs was studied. High values of cold field emission were observed, as well as nonlinearity and anomalies of the current-voltage characteristic (I-V characteristics), which manifested themselves in the form of peaks at low and high current values. Peaks in the CVC have distinct areas of negative differential conductivity. It is argued, that the anomalously high currents in the I–V characteristics of cold field emission of electrons from a nanoemitter made of closed CNTs can be associated with a sharp increase in the density of electron states at energies near the van Hove singularity.
Keywords
carbon nanotubes (CNTs); cold field emission of electrons; Fowler-Nordheim law; current-voltage characteristic (CVC); pointed cathodes; negative differential conductivity; van Hove singularity; superlattice
Subject
Physical Sciences, Condensed Matter Physics
Copyright:
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