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Erratum published on 7 January 2019, see Materials 2019, 12(1), 165.
Open AccessArticle

Piezoelectric Response of Multi-Walled Carbon Nanotubes

1
Electronics and Electronic Equipment Engineering, Institute of Nanotechnologies, Southern Federal University, 347922 Taganrog, Russia
2
Research and Education Center “Nanotechnologies”, Southern Federal University, 347922 Taganrog, Russia
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(4), 638; https://doi.org/10.3390/ma11040638
Received: 30 March 2018 / Revised: 17 April 2018 / Accepted: 17 April 2018 / Published: 21 April 2018
(This article belongs to the Special Issue Carbon Nanotubes 2018)
Recent studies in nanopiezotronics have indicated that strained graphene may exhibit abnormal flexoelectric and piezoelectric properties. Similar assumptions have been made with regard to the properties of carbon nanotubes (CNTs), however, this has not so far been confirmed. This paper presents the results of our experimental studies confirming the occurrence of a surface piezoelectric effect in multi-walled CNTs under a non-uniform strain. Using atomic force microscopy, we demonstrated the piezoelectric response of multi-walled CNTs under compression and bending. The current generated by deforming an individual CNT was shown to be −24 nA. The value of the surface potential at the top of the bundle of strained CNTs varied from 268 mV to −110 mV, depending on strain type and magnitude. We showed that the maximum values of the current and the surface potential can be achieved when longitudinal strain predominates in a CNT. However, increasing the bending strain of CNTs does not lead to a significant increase in current and surface potential, due to the mutual compensation of piezoelectric charges concentrated on the CNT side walls. The results of the study offer a number of opportunities and challenges for further fundamental research on the piezoelectric properties of carbon nanotubes as well as for the development of advanced CNT-based nanopiezotronic devices. View Full-Text
Keywords: nanoelectronics; nanopiezotronics; carbon nanotubes; piezoelectric effect; flexoelectric effect; strain; scanning probe microscopy nanoelectronics; nanopiezotronics; carbon nanotubes; piezoelectric effect; flexoelectric effect; strain; scanning probe microscopy
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MDPI and ACS Style

Il’ina, M.V.; Il’in, O.I.; Blinov, Y.F.; Konshin, A.A.; Konoplev, B.G.; Ageev, O.A. Piezoelectric Response of Multi-Walled Carbon Nanotubes. Materials 2018, 11, 638.

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