TEMPERATURE DEPENDENCE OF ELECTRICAL RESISTANCE OF INDIVIDUAL CARBON NANOTUBES AND CARBON NANOTUBES NETWORK

We present a model to understand the effect of temperature on the electrical resistance of individual semiconducting single wall carbon nanotubes (s-SWCNTs) of various diameters under various electric fields. The temperature dependence of the resistance of s-SWCNTs and metallic SWCNTs (m-SWCNTs) are compared. These results help us to understand the temperature dependence of the resistance of SWCNTs network. We experimentally examine the temperature dependence of the resistance of random networks of SWCNTs, prepared by dispersing CNTs in ethanol and drop-casting the solution on prefabricated metallic electrodes. Examining various samples with different electrode materials and spacings, we find that the dominant resistance in determination of the temperature dependence of resistance of the network is the resistance of individual tubes, rather than the tube–tube resistance or tube–metal contact resistance. It is also found that the tube–tube resistance depends on the electrode spacing and it is more important for larger electrode spacings. By applying high electric field to burn the all-metallic paths of the SWCNTs network, the temperature dependence of the resistance of s-SWCNTs is also examined. We also investigate the effect of acid treatment of CNTs on the temperature dependence of the resistance of SWCNTs and also multi-wall CNTs (MWCNTs) networks.

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Temperature dependence of the Raman spectra of single-wall carbon nanotubes

Applied Physics Letters ◽

10.1063/1.126252 ◽

2000 ◽

Vol 76 (15) ◽

pp. 2053-2055 ◽

Cited By ~ 124

Author(s):

H. D. Li ◽

K. T. Yue ◽

Z. L. Lian ◽

Y. Zhan ◽

L. X. Zhou ◽

...

Keyword(s):

Carbon Nanotubes ◽

Temperature Dependence ◽

Raman Spectra ◽

Single Wall Carbon Nanotubes ◽

Single Wall Carbon

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Phonon contribution to electrical resistance of acceptor-doped single-wall carbon nanotubes assembled into transparent films

Physical Review B ◽

10.1103/physrevb.94.245438 ◽

2016 ◽

Vol 94 (24) ◽

Cited By ~ 12

Author(s):

V. I. Tsebro ◽

A. A. Tonkikh ◽

D. V. Rybkovskiy ◽

E. A. Obraztsova ◽

E. I. Kauppinen ◽

...

Keyword(s):

Carbon Nanotubes ◽

Electrical Resistance ◽

Single Wall Carbon Nanotubes ◽

Phonon Contribution ◽

Single Wall Carbon ◽

Transparent Films

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Electrochemical determination of thiols at single-wall carbon nanotubes and PQQ modified electrodes

Frontiers in Bioscience ◽

10.2741/1587 ◽

2005 ◽

Vol 10 (1-3) ◽

pp. 931 ◽

Cited By ~ 22

Author(s):

Heyou, Han

Keyword(s):

Carbon Nanotubes ◽

Modified Electrodes ◽

Electrochemical Determination ◽

Single Wall Carbon Nanotubes ◽

Single Wall Carbon

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Research on Key Technology of Electrochemical Sterilization and Physical Application for Circulating Cooling Water

Journal of Physics Conference Series ◽

10.1088/1742-6596/2083/2/022068 ◽

2021 ◽

Vol 2083 (2) ◽

pp. 022068

Author(s):

Xiaohui Wang ◽

Chunyan Song ◽

Xueying Xie ◽

Nan Zhang ◽

Ruiqing Guo ◽

...

Keyword(s):

Electric Fields ◽

Electrode Materials ◽

High Efficiency ◽

Thermal Power ◽

Cooling Water ◽

Environmentally Friendly ◽

Research Progress ◽

Electrode Spacing ◽

Experimental Conditions ◽

Circulating Cooling Water

Abstract As a high-efficiency, low-cost, convenient and environmentally friendly sterilization technology, electrochemical disinfection has developed rapidly in recent years. Electrochemical sterilization is an environmentally friendly sterilization technology. The research progress of this technology in the recent 30 years in sterilization mechanism and electrode materials is summarized. The mechanism of electrochemical sterilization includes the chemical effects of active chlorine, active intermediates, copper or silver ions, and the physical effects of electric fields; the electrode materials used are titanium anode, carbon cathode, and anode. The article combined with electrochemical equipment in a thermal power plant cold open circulating cooling water treatment experiment. Experimental research found that under the conditions of current density of 120A/m2, residence time of 10s, and electrode spacing of 1.8cm, the bactericidal effect can reach 97%. Under certain experimental conditions and a certain period of time, the total number of heterogeneous bacteria in the circulating cooling water after treatment can be effectively inhibited.

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Fabrication of Polyaniline/Carbon Nanotubes Composites Using Carbon Nanotubes Films Obtained by Electrophoretic Deposition

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.507.113 ◽

2012 ◽

Vol 507 ◽

pp. 113-117 ◽

Cited By ~ 1

Author(s):

Luisa Pilan ◽

Matei Raicopol ◽

Mariana Ioniţă

Keyword(s):

Carbon Nanotubes ◽

Electrode Materials ◽

Diazonium Salt ◽

Modified Electrodes ◽

Single Wall Carbon Nanotubes ◽

Composite Electrodes ◽

Electrochemically Deposited ◽

Aniline Oxidation ◽

Storage Properties ◽

Diphenyl Amine

In this study, we report a facile electrochemical method to obtain polyaniline/single-wall carbon nanotubes (PANI/SWCNTs) composite electrodes by combining the electroreduction of diazonium salts and electropolymerization of conductive polymers. In a first step, the SWCNTs are covalently functionalized with diphenyl amine through the electrochemical reduction of the 4-aminodiphenylamine diazonium salt in order to provide anchors for the subsequent polymer electrodepostion. The aniline oxidation remains possible on this grafted layer and PANI can easily be deposited on the diphenyl amine-modified electrodes. The electrochemically deposited PANI/SWCNTs composites exhibit excellent electrochemical charge storage properties making them promising electrode materials for high power supercapacitors.

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Electrical Resistance of Single-Wall Carbon Nanotubes with Determined Chiral Indices

MRS Proceedings ◽

10.1557/proc-1204-k07-06 ◽

2009 ◽

Vol 1204 ◽

Author(s):

Letian Lin ◽

Lu-Chang Qin ◽

Sean Washburn ◽

Scott Paulson

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Vapor Deposition ◽

Electrical Resistance ◽

Room Temperature ◽

Chemical Vapor ◽

Single Wall Carbon Nanotubes ◽

Single Wall Carbon ◽

Transmission Electron ◽

Highly Sensitive

AbstractThe properties of a carbon nanotube (CNT), in particular a single-wall carbon nanotube (SWNT), are highly sensitive to the atomic structure of the nanotube described by its chirality (chiral indices). We have grown isolated SWNTs on a silicon substrate using chemical vapor deposition (CVD) and patterned sub-micron probes using electron beam lithography. The SWNT was exposed by etching the underlying substrate for transmission electron microscope (TEM) imaging and diffraction studies. For each individual SWNT, its electrical resistance was measured by the four-probe method at room temperature and the chiral indices of the same SWNT were determined by nano-beam electron diffraction. The contact resistances were reduced by annealing to typically 3-5 kΩ. We have measured the I-V curve and determined the chiral indices of each nanotube individually from four SWNTs selected randomly – two are metallic and two are semiconducting. We will present the electrical resistances in correlation with the carbon nanotube diameter as well as the band gap calculated from the determined chiral indices for the semiconducting carbon nanotubes. These experimental results are also discussed in connection with theoretical estimations.

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Effect of Saline Solution on the Electrical Response of Single Wall Carbon Nanotubes-Epoxy Nanocomposites

Journal of Nanomaterials ◽

10.1155/2017/6843403 ◽

2017 ◽

Vol 2017 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Hammad Younes ◽

Md. Mahfuzur Rahman ◽

Amal Al Ghaferi ◽

Irfan Saadat

Keyword(s):

Carbon Nanotubes ◽

Real Time ◽

Electrical Resistance ◽

Saline Solution ◽

Time Measurement ◽

Single Wall Carbon Nanotubes ◽

Glass Wafer ◽

Epoxy Nanocomposites ◽

Single Wall Carbon ◽

Real Time Measurement

The effects of saline solution on the electrical resistance of single wall carbon nanotubes-epoxy nanocomposites have been investigated experimentally. Ultrasonic assisted fabricated 1.0% and 0.5 W/W% SWCNTs epoxy nanocomposites are integrated into a Kelvin structure by smear cast the nanocomposites on a glass wafer. Four metal pads are deposited on the nanocomposites using the beam evaporator and wires are tethered using soldering. The effect of saline solution on the electrical resistance of the nanocomposites is studied by adding drop of saline solution to the surface of the fabricated nanocomposites and measuring electrical resistance. Moreover, the nanocomposites are soaked completely into 3 wt.% saline solution and real-time measurement of the electrical resistance is conducted. It is found that a drop of saline solution on the surface of the nanocomposites film increases the resistance by 50%. Furthermore, the real-time measurement reveals a 40% increase in the resistance of the nanocomposites film. More importantly, the nanocomposites are successfully reset by soaking in DI water for four hours. This study may open the door for using SWCNTs epoxy nanocomposites as scale sensors in oil and gas industry.

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Temperature Dependence of Exciton Recombination in Semiconducting Single-Wall Carbon Nanotubes

Nano Letters ◽

10.1021/nl062609p ◽

2007 ◽

Vol 7 (2) ◽

pp. 398-402 ◽

Cited By ~ 63

Author(s):

S. Berger ◽

C. Voisin ◽

G. Cassabois ◽

C. Delalande ◽

P. Roussignol ◽

...

Keyword(s):

Carbon Nanotubes ◽

Temperature Dependence ◽

Single Wall Carbon Nanotubes ◽

Single Wall Carbon ◽

Exciton Recombination

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Determination of moisture content of single-wall carbon nanotubes

Analytical and Bioanalytical Chemistry ◽

10.1007/s00216-011-5509-y ◽

2011 ◽

Vol 402 (1) ◽

pp. 429-438 ◽

Cited By ~ 12

Author(s):

Ralph E. Sturgeon ◽

Joseph W. Lam ◽

Anthony Windust ◽

Patricia Grinberg ◽

Rolf Zeisler ◽

...

Keyword(s):

Carbon Nanotubes ◽

Moisture Content ◽

Single Wall Carbon Nanotubes ◽

Single Wall Carbon

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Determination of Phenol and Chlorophenols at Single-Wall Carbon Nanotubes/Poly(3,4-ethylenedioxythiophene) Modified Glassy Carbon Electrode Using Flow Injection Amperometry

ISRN Analytical Chemistry ◽

10.1155/2014/926213 ◽

2014 ◽

Vol 2014 ◽

pp. 1-10 ◽

Cited By ~ 10

Author(s):

Negussie Negash ◽

Hailemichael Alemu ◽

Merid Tessema

Keyword(s):

Carbon Nanotubes ◽

Glassy Carbon Electrode ◽

Glassy Carbon ◽

Flow Injection ◽

Analytical Performance ◽

Single Wall Carbon Nanotubes ◽

Carbon Electrode ◽

Modified Glassy Carbon Electrode ◽

Single Wall Carbon

Phenol and chlorophenols were investigated using single-wall carbon nanotubes (SWCNT) and poly(3,4-ethylenedioxythiophene) (PEDOT) composite modified glassy carbon electrode (SWCNT/PEDOT/GCE) as a detector in flow injection system. Optimization of experimental variables such as the detection potential, flow rate, and pH of the carrier solution (0.1 M sodium acetate) for the determination of phenol (P), 4-chlorophenol (CP), 2,4-dichlorophenol (DCP), 2,4,6-trichlorophenol (TCP), and pentachlorophenol (PCP) were performed. Under these conditions, analytical parameters were calculated from the calibration curve of measured amperometric responses as a function of concentrations of phenol and chlorophenols. The designed electrode exhibited very good analytical performance. The designed electrode was tested with 20 repetitive injections of each analyte and showed good operational stability. The analytical performance of the SWCNT/PEDOT/GCE electrode under flow through conditions was tested and was found to be impressive. The electrode showed a wider dynamic range for the detection of phenol and chlorophenols with low limits of detection compared with other enzymatic and nonenzymatic sensors. These results suggest that the method is quite useful for the analysis and monitoring of phenols and chlorophenols.

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