Abstract
The piezoelectric properties of vertically aligned carbon nanotubes (CNTs) are characterized by piezoresponse force microscopy, and their dependence on the concentration of the doping impurity of nitrogen is established. It is shown that carbon nanotubes have predominantly longitudinal polarization, due to the direction of the dipole moment in the bamboo-like bridges of the nanotubes. It is found that lowering the temperature of growth from 690 to 645°C raises of piezoelectric strain coefficient of the carbon nanotubes from 4.5 to 21.2 pm/V. Results in this work can be used in developing energy-efficient nanopiezotronic devices.
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This work was supported by the RF Ministry of Science and Higher Education as part of State Task no. FENW-2022-0001.
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Translated by E. Boltukhina
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Il’ina, M.V., Soboleva, O.I., Polyvianova, M.R. et al. Characterizing Vertically Aligned Carbon Nanotubes by Piezoresponse Force Microscopy. Bull. Russ. Acad. Sci. Phys. 87, 1432–1437 (2023). https://doi.org/10.3103/S1062873823703446
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DOI: https://doi.org/10.3103/S1062873823703446