Using current-voltage characteristics to control the structure of contacts in composites based on polyethylene modified with multi-walled carbon nanotubes

2020 ◽  
Vol 61 (4) ◽  
Keyword(s):  
Carbon Nanotubes ◽  
Current Voltage ◽  
Multi Walled Carbon Nanotubes ◽  
Current Voltage Characteristics ◽  
Walled Carbon Nanotubes

scholarly journals Effect of Different Sized Multi Walled Carbon Nanotubes on the Barrier Potential and Trap Concentration of Malachite Green Dye Based Organic Device

2020 ◽  
Vol 20 (4) ◽  
pp. 16-26
Author(s):  
Sudipta Sen ◽  
N. B. Manik
Keyword(s):  
Carbon Nanotubes ◽  
Malachite Green ◽  
Trap Energy ◽  
Trap Concentration ◽  
Barrier Potential ◽  
Current Voltage ◽  
Multi Walled Carbon Nanotubes ◽  
Current Voltage Characteristics ◽  
Walled Carbon Nanotubes ◽  
Transition Voltage

AbstractPresent work shows effect of 8 nm diameter and 30 nm diameter multi walled carbon nanotubes (MWCNT) on the barrier potential and trap concentration of Malachite Green (MG) dye based organic device. MWCNTs are basically a bundle of concentric single-walled carbon nanotubes with different diameters. In this work, ITO coated glass substrate and aluminium have been used as front electrode and back electrode respectively and the spin coating method is used to prepare the MG dye based organic device. It has been observed that both barrier potential and trap concentration are in correlation. Estimation of both these parameters has been done from current-voltage characteristics of the device to estimate the trap energy and the barrier potential of the device. Device turn-on voltage or the transition voltage is also calculated by using current-voltage characteristics. In presence of 8 nm diameter MWCNT, the transition voltage is reduced from 3.9 V to 2.37 V, the barrier potential is lowered to 0.97 eV from 1.12 eV and the trap energy is lowered to 0.028 eV from 0.046 eV whereas incorporation of 30 nm diameter MWCNT shows reduction of transition voltage from 3.9 V to 2.71 V and a reduction of barrier potential and trap concentration from 1.12 eV to 1.03 eV and from 0.046 eV to 0.035 eV respectively. Presence of both 8 nm diameter and 30 nm diameter MWCNT lowers trap energy approximately to 39% and 24% respectively and lowers barrier potential approximately to 13% and 8% respectively. Estimation of barrier potential is also done by Norde method which shows lowering of the value from 0.88 eV to 0.79 eV and from 0.88 eV to 0.84 eV in presence of both 8 nm and 30 nm diameter multi walled carbon nanotubes respectively. Calculation of barrier potential from both the I-V characteristics and Norde method are in unison with each other. Indication of enhancement of charge flow in the device can be ascribed to the truncated values of barrier potential and trap energy.

scholarly journals Особенности токопереноса в пленках поливинилового спирта с включениями многостенных углеродных нанотрубок на подложках Si

2020 ◽  
Vol 46 (12) ◽  
pp. 26
Author(s):  
С.В. Васин ◽  
M.C. Ефимов ◽  
В.А. Сергеев
Keyword(s):  
Reverse Bias ◽  
Positive Temperature Coefficient ◽  
Positive Temperature ◽  
Temperature Coefficient Of Resistance ◽  
Tunneling Mechanism ◽  
Planar Structures ◽  
Current Voltage ◽  
Multi Walled Carbon Nanotubes ◽  
Current Voltage Characteristics ◽  
Walled Carbon Nanotubes

It is shown that aluminum / polyvinyl alcohol (PVA) with the inclusion of multi-walled carbon nanotubes (MWCNTs) / silicon planar structures demonstrate rectifying properties and their current-voltage characteristics are asymmetric and non-linear. With direct bias, the structures have a positive temperature coefficient of resistance (TCR) in the temperature range of 270-350 K, while the structures without MWCNTs exhibit negative TCR. Under reverse bias, the studied structures with MWCNTs showed TCS changing sign from negative to positive. To explain the obtained dependences, the tunneling mechanism of current transfer is considered.

Zinc and Aluminum Phthalocyanine Modified Carbon Nanotubes; Preparation and Characterizations

2021 ◽  
Vol 19 (9) ◽  
pp. 132-141
Author(s):  
Shaymaa Hussein Nowfal ◽  
Hikmat Adnan Banimuslem ◽  
Nassar A. Al-Isawi ◽  
Hayder M.A. Ghanimi
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Hybrid Materials ◽  
Vital Role ◽  
Zinc Phthalocyanine ◽  
Visible Absorption ◽  
Current Voltage ◽  
Multi Walled Carbon Nanotubes ◽  
Modified Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In this work, two elements were developed. The first is Multi walled carbon nanotubes-zinc phthalocyanine (ZnPcs). In addition, there was also a development of the multi walled carbon nanotubes-aluminium phthalocyanine hybrid materials. The multi-walled carbon nanotubes were under treated with nitric combined with the sulfuric acid before being mixed with phthalocyanines to de-build the effects. Drop-casting hybrid materials to slides of the glass and interdigitating electrodes from their dimethylformamide solution have been done. The perfect hybridization owing to π-π interaction was discovered. This discovery was assisted by two elements. The first is the ultraviolet-visible absorption spectroscopy. Moreover, another element that played a vital role in this discovery is Fourier Transform Infrared Spectroscopy. The hybrid films were tested for current-voltage measurements and direct electrical conductivity. This work has also examined how temperature affects direct electrical conductivity and power generation.

Multi-walled Carbon Nanotubes Penetrate into Plant Cells and Affect the Growth of Onobrychis arenaria Seedlings

Acta Naturae ◽  
2011 ◽  
Vol 3 (1) ◽  
pp. 99-106 ◽  
Author(s):  
E A Smirnova ◽  
A A Gusev ◽  
O N Zaitseva ◽  
E M Lazareva ◽  
G E Onishchenko ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Plant Cells ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Incorporation of Multi Wall Carbon Nanotubes into Glass-Surfaces via Laser-Treatment

2003 ◽  
Vol 772 ◽  
Author(s):  
T. Seeger ◽  
G. de la Fuente ◽  
W.K. Maser ◽  
A.M. Benito ◽  
A. Righi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Continuous Wave ◽  
Silica Surface ◽  
Multi Wall Carbon Nanotubes ◽  
Composite Formation ◽  
Multi Walled Carbon Nanotubes ◽  
Glass Surfaces ◽  
Walled Carbon Nanotubes ◽  
First Time ◽  
Scanning Electron

AbstractCarbon nanotubes (CNT) are interesting candidates for the reinforcement in robust composites and for conducting fillers in polymers due to their fascinating electronic and mechanical properties. For the first time, we report the incorporation of multi walled carbon nanotubes (MWNTs) into silica-glass surfaces by means of partial surface-melting caused by a continuous wave Nd:YAG laser. MWNTs were detected being well incorporated in the silica-surface. The composites are characterized using scanning electron microscopy (SEM) and Raman-spectroscopy. A model for the composite-formation is proposed based on heatabsorption by MWNTs and a partial melting of the silica-surface.

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