Sign in to use this feature.

Years

Between: -

Subjects

remove_circle_outline
remove_circle_outline

Journals

Article Types

Countries / Regions

Search Results (3)

Search Parameters:
Keywords = nanopiezotronics

Order results
Result details
Results per page
Select all
Export citation of selected articles as:
11 pages, 2925 KB  
Article
Study of Nitrogen-Doped Carbon Nanotubes for Creation of Piezoelectric Nanogenerator
by Marina V. Il’ina, Olga I. Soboleva, Soslan A. Khubezov, Vladimir A. Smirnov and Oleg I. Il’in
J. Low Power Electron. Appl. 2023, 13(1), 11; https://doi.org/10.3390/jlpea13010011 - 22 Jan 2023
Cited by 10 | Viewed by 4672
Abstract
The creation of sustainable power sources for wearable electronics and self-powered systems is a promising direction of modern electronics. At the moment, a search for functional materials with high values of piezoelectric coefficient and elasticity, as well as non-toxicity, is underway to generate [...] Read more.
The creation of sustainable power sources for wearable electronics and self-powered systems is a promising direction of modern electronics. At the moment, a search for functional materials with high values of piezoelectric coefficient and elasticity, as well as non-toxicity, is underway to generate such power sources. In this paper, nitrogen-doped carbon nanotubes (N-CNTs) are considered as a functional material for a piezoelectric nanogenerator capable of converting nanoscale deformations into electrical energy. The effect of defectiveness and of geometric and mechanical parameters of N-CNTs on the current generated during their deformation is studied. It was established that the piezoelectric response of N-CNTs increased nonlinearly with an increase in the Young’s modulus and the aspect ratio of the length to diameter of the nanotube and, on the contrary, decreased with an increase in defectiveness not caused by the incorporation of nitrogen atoms. The advantages of using N-CNT to create energy-efficient piezoelectric nanogenerators are shown. Full article
(This article belongs to the Special Issue Energy-Harvesting and Self-Powered Devices)
Show Figures

Figure 1

14 pages, 4813 KB  
Article
Analysis of the Piezoelectric Properties of Aligned Multi-Walled Carbon Nanotubes
by Marina V. Il’ina, Oleg I. Il’in, Nikolay N. Rudyk, Olga I. Osotova, Alexander A. Fedotov and Oleg A. Ageev
Nanomaterials 2021, 11(11), 2912; https://doi.org/10.3390/nano11112912 - 30 Oct 2021
Cited by 18 | Viewed by 3651
Abstract
Recent studies reveal that carbon nanostructures show anomalous piezoelectric properties when the central symmetry of their structure is violated. Particular focus is given to carbon nanotubes (CNTs) with initial significant curvature of the graphene sheet surface, which leads to an asymmetric redistribution of [...] Read more.
Recent studies reveal that carbon nanostructures show anomalous piezoelectric properties when the central symmetry of their structure is violated. Particular focus is given to carbon nanotubes (CNTs) with initial significant curvature of the graphene sheet surface, which leads to an asymmetric redistribution of the electron density. This paper presents the results of studies on the piezoelectric properties of aligned multi-walled CNTs. An original technique for evaluating the effective piezoelectric coefficient of CNTs is presented. For the first time, in this study, we investigate the influence of the growth temperature and thickness of the catalytic Ni layer on the value of the piezoelectric coefficient of CNTs. We establish the relationship between the effective piezoelectric coefficient of CNTs and their defectiveness and diameter, which determines the curvature of the graphene sheet surface. The calculated values of the effective piezoelectric coefficient of CNTs are shown to be between 0.019 and 0.413 C/m2, depending on the degree of their defectiveness and diameter. Full article
Show Figures

Figure 1

10 pages, 2000 KB  
Article
Piezoelectric Response of Multi-Walled Carbon Nanotubes
by Marina V. Il’ina, Oleg I. Il’in, Yuriy F. Blinov, Alexey A. Konshin, Boris G. Konoplev and Oleg A. Ageev
Materials 2018, 11(4), 638; https://doi.org/10.3390/ma11040638 - 21 Apr 2018
Cited by 50 | Viewed by 7255
Abstract
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Carbon Nanotubes 2018)
Show Figures

Graphical abstract

Back to TopTop