The memristive behavior of non-uniform strained carbon nanotubes

Il’ina, M. V.; Il’in, O. I.; Rudyk, N N; Konshin, A A; Агеев, О. А.

doi:10.17586/2220-8054-2018-9-1-76-78

Cited by 3 publications

(5 citation statements)

References 7 publications

(8 reference statements)

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“…Subsequent application of an external electric field to an unevenly deformed carbon nanotube will lead to a redistribution of the initial deformation and the internal electric field as a result of the manifestation of the inverse piezoelectric effect. [29,30,[39][40][41]. This process was clearly reflected in the CVC of a deformed CNT in the form of a hysteresis loop, the area of which depended on the magnitude of the initial deformation and the stress applied (Figure 4).…”

Section: Resultsmentioning

confidence: 95%

“…In this case, it is interesting that a significant bending moment is initially formed in carbon nanotubes (CNTs), which can lead to the manifestation of the surface piezoelectricity [22]. For the first time, we discovered the anomalous piezoelectric properties of CNTs via experimental research studying the memristor effect in a deformed CNT [29][30][31]. The appearance of the internal electric field strength in a deformed carbon nanotube connected with its piezoelectric properties was shown [29,31].…”

Section: Introductionmentioning

confidence: 98%

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Analysis of the Piezoelectric Properties of Aligned Multi-Walled Carbon Nanotubes

et al. 2021

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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.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 98%

Analysis of the Piezoelectric Properties of Aligned Multi-Walled Carbon Nanotubes

et al. 2021

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“…The height of the VA CNT is not displayed correctly on the STM image due to the peculiarities of measuring the VA CNT array by the STM [36]. Based on the CVC of the individual VA CNT (Figure 8b), it can be concluded that the individual VA CNT exhibits two conduction states: high resistance when the voltage is varied from 0 to 10 V and low resistance when the voltage varies from 10 to 0 V, which is due to the manifestation of a memristor effect in VA CNT [3,26,29,39,40]. The low-resistance state of the VA CNT was used to determine the resistance of the nanotube, since there is no additional resistance in VA CNT associated with the internal electric field in the nanotube [3,40].…”

Section: A Technique For Determining the Resistivity Of Vertically Almentioning

confidence: 99%

“…This chapter describes unique techniques for determining the height, Young's modulus, bending stiffness, resistivity and adhesion to a substrate of vertically aligned carbon nanotubes, based on the methods of scanning probe microscopy. Described techniques can be used for nanodiagnostics of parameters of individual vertically aligned carbon nanotubes and for creation of nanoelectronic elements and devices on their basis [1,11,21,23,[25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Scanning Probe Techniques for Characterization of Vertically Aligned Carbon Nanotubes

Il’ina¹,

Il’in²,

Smirnov³

et al. 2019

Atomic-Force Microscopy and Its Applications

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This chapter presents the results of experimental studies of the electrical, mechanical and geometric parameters of vertically aligned carbon nanotubes (VA CNTs) using scanning probe microscopy (SPM). This chapter also presents the features and difficulties of characterization of VA CNTs in different scanning modes of the SPM. Advanced techniques for VA CNT characterization (the height, Young's modulus, resistivity, adhesion and piezoelectric response) taking into account the features of the SPM modes are described. The proposed techniques allow to overcome the difficulties associated with the vertical orientation and high aspect ratio of nanotubes in determining the electrical and mechanical parameters of the VA CNTs by standard methods. The results can be used in the development of diagnostic methods as well as in nanoelectronics and nanosystem devices based on vertically aligned carbon nanotubes (memory elements, adhesive structures, nanoelectromechanical switches, emission structures, etc.).

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“…Experimental and theoretical studies have recently focused on carbon-based nanoparticles, such as carbon nanotubes and graphene, for drug delivery [14][15][16][17][18][19][20][21]. With a unique set of mechanical, electrical and chemical properties [22][23][24][25][26][27][28][29], carbon nanotubes have many applications in chemical pharmaceutical researches [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

The prediction of COOH functionalized carbon nanotube application in melphalan drug delivery

Lari¹,

Morsali²,

Heravi³

2019

Nanosystems: Phys. Chem. Math.

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Using quantum chemical calculations, noncovalent functionalization of melphalan drug on the surface of functionalized carbon nanotube (NT) have been examined. Quantum molecular descriptors of noncovalent interactions were investigated. It was concluded that binding of drug melphalan into COOH-functionalized NT (FNT) is exothermic and makes the system stable. Comparison between FNT and COCl functionalized NT (F NT) showed that FNT has more binding energy and may act as a carrier for drug delivery (if the noncovalent functionalization is desired). The OH and NH 2 groups of melphalan may bond to Cl (COCl mechanism) and COOH (COOH mechanism) of F NT and FNT, respectively. Therefore, four mechanisms for the covalent functionalization have been investigated. The transition states of four pathways were optimized and activation parameters were evaluated. The high barriers of COOH pathway are greater than those of COCl pathway and therefore F NT is suitable carrier for covalent functionalization.

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The memristive behavior of non-uniform strained carbon nanotubes

Cited by 3 publications

References 7 publications

Analysis of the Piezoelectric Properties of Aligned Multi-Walled Carbon Nanotubes

Analysis of the Piezoelectric Properties of Aligned Multi-Walled Carbon Nanotubes

Scanning Probe Techniques for Characterization of Vertically Aligned Carbon Nanotubes

The prediction of COOH functionalized carbon nanotube application in melphalan drug delivery

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