Comparison between Carbon Nanotube-Based, Graphite-Based, and Rice Hull Carbon-Based Electrodes with Rice Hull Silica as Catalyst for Electrochemical Detection of Copper

This study aimed to determine the copper ion-sensing ability of a carbon nanotube (CNT)-based sensor with carbonized rice hull (CRH) as catalyst. The 50:50 CNT-CRH electrode was compared to 100% graphite, 100% CRH, 100% CNT, 50:50 graphite-CRH, and 70:30 graphite-CRH electrodes. Copper chloride (CuCl2) concentrations of 0.01M, 0.02M, 0.03M, 0.04M, 0.04M, 0.05M, 0.06, 0.07M, 0.08M, 0.09M, and 0.1M were used to test the response of the electrodes. Five trials were done for each concentration. The 50:50 CNT-CRH electrode exhibited good sensor characteristics such as high sensitivity, low resolution, and high correlation in concentration-voltage relationship. Electrical characterization using three-electrode system showed a linear relationship between the concentrations and voltage response. The 50:50 CNT-CRH electrode exhibited a sensitivity of 0.0619 V/0.01M or 9.7 mV/100ppm and a resolution of 10 ppm/1mV. The electrode also exhibited a high correlation R2 value of 0.933.

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Spectroscopy-Based Mapping with Scanning Microwave Impedance Microscopy

10.31399/asm.cp.istfa2018p0550 ◽

2018 ◽

Author(s):

Peter De Wolf ◽

Zhuangqun Huang ◽

Bede Pittenger

Keyword(s):

Single Point ◽

Electrical Characterization ◽

Principal Component ◽

High Sensitivity ◽

Data Cube ◽

Nanometer Scale ◽

Learning Approaches ◽

Data Set ◽

3D Data ◽

Higher Dimensional

Abstract Methods are available to measure conductivity, charge, surface potential, carrier density, piezo-electric and other electrical properties with nanometer scale resolution. One of these methods, scanning microwave impedance microscopy (sMIM), has gained interest due to its capability to measure the full impedance (capacitance and resistive part) with high sensitivity and high spatial resolution. This paper introduces a novel data-cube approach that combines sMIM imaging and sMIM point spectroscopy, producing an integrated and complete 3D data set. This approach replaces the subjective approach of guessing locations of interest (for single point spectroscopy) with a big data approach resulting in higher dimensional data that can be sliced along any axis or plane and is conducive to principal component analysis or other machine learning approaches to data reduction. The data-cube approach is also applicable to other AFM-based electrical characterization modes.

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Direct Detection of Circularly Polarized Light Using Chiral Copper Chloride–Carbon Nanotube Heterostructures

ACS Nano ◽

10.1021/acsnano.1c01134 ◽

2021 ◽

Author(s):

Ji Hao ◽

Haipeng Lu ◽

Lingling Mao ◽

Xihan Chen ◽

Matthew C. Beard ◽

...

Keyword(s):

Carbon Nanotube ◽

Direct Detection ◽

Copper Chloride ◽

Polarized Light ◽

Circularly Polarized Light ◽

Circularly Polarized

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Electrical characterization of carbon nanotube metal matrix composite solar cell electrodes under mechanical stress

2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC) ◽

10.1109/pvsc.2016.7749835 ◽

2016 ◽

Cited By ~ 1

Author(s):

Nathanael D. Cox ◽

Michael Pham ◽

Nathan Gapp ◽

Aaron Rape ◽

Jamie Rossi ◽

...

Keyword(s):

Solar Cell ◽

Carbon Nanotube ◽

Mechanical Stress ◽

Metal Matrix Composite ◽

Matrix Composite ◽

Metal Matrix ◽

Electrical Characterization

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A Review: Carbon Nanotube-Based Piezoresistive Strain Sensors

Journal of Sensors ◽

10.1155/2012/652438 ◽

2012 ◽

Vol 2012 ◽

pp. 1-15 ◽

Cited By ~ 152

Author(s):

Waris Obitayo ◽

Tao Liu

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Composite Films ◽

Strain Sensors ◽

Voltage Response ◽

Strain Sensing ◽

Multiwalled Carbon ◽

Sensing Applications ◽

Mechanical Deformations ◽

Electrical Resistivities

The use of carbon nanotubes for piezoresistive strain sensors has acquired significant attention due to its unique electromechanical properties. In this comprehensive review paper, we discussed some important aspects of carbon nanotubes for strain sensing at both the nanoscale and macroscale. Carbon nanotubes undergo changes in their band structures when subjected to mechanical deformations. This phenomenon makes them applicable for strain sensing applications. This paper signifies the type of carbon nanotubes best suitable for piezoresistive strain sensors. The electrical resistivities of carbon nanotube thin film increase linearly with strain, making it an ideal material for a piezoresistive strain sensor. Carbon nanotube composite films, which are usually fabricated by mixing small amounts of single-walled or multiwalled carbon nanotubes with selected polymers, have shown promising characteristics of piezoresistive strain sensors. Studies also show that carbon nanotubes display a stable and predictable voltage response as a function of temperature.

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Opto-electrical characterization of infrared sensors based on carbon nanotube films

Comptes Rendus Physique ◽

10.1016/j.crhy.2010.06.005 ◽

2010 ◽

Vol 11 (5-6) ◽

pp. 405-410 ◽

Cited By ~ 3

Author(s):

Charlie Koechlin ◽

Sylvain Maine ◽

Stéphanie Rennesson ◽

Riad Haidar ◽

Brigitte Trétout ◽

...

Keyword(s):

Carbon Nanotube ◽

Electrical Characterization ◽

Infrared Sensors ◽

Nanotube Films

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Conducting Properties of a Contact Between Open-End Carbon Nanotube and Various Electrodes

Volume 5: Electronics and Photonics ◽

10.1115/imece2009-11117 ◽

2009 ◽

Author(s):

Feng Gao ◽

Jianmin Qu ◽

Matthew Yao

Keyword(s):

Electronic Structure ◽

Carbon Nanotube ◽

Density Functional ◽

Low Voltage ◽

Local Density ◽

Electrical Contact ◽

Metal Electrode ◽

Electrode System ◽

Voltage Bias ◽

Electronic Conductance

The carbon nanotube (CNT) is becoming a promising candidate as electrical interconnects in nanoscale electronics. This paper reports the electronic structure and the electrical conducting properties at the interface between an open-end single wall CNT (SWCNT) and various metal electrodes, such as Al, Au, Cu, and Pd. A simulation cell consisting of an SWCNT with each end connected to the metal electrode was constructed. A voltage bias is prescribed between the left- and right-electrodes to compute the electronic conductance. Due to the electronic structure, the electron density and local density of states (LDOS) are calculated to reveal the interaction behavior at the interfaces. The first-principle quantum mechanical density functional and non-equilibrium Green’s function (NEGF) approaches are adopted to compute the transport coefficient. After that, the voltage-current relation is calculated using the Landauer-Buttiker formalism. The results show that electrons are conducted through the electrode/CNT/electrode two-probe system. The contact electronic resistance is calculated by averaging the values in the low voltage bias regime (0.0–0.1 V), in which the voltage–current relationship is found to be linear. And the electrical contact conductance of electrode/CNT/electrode system show the electrode-type dependent, however, the amplitude for different electrodes is of the same order.

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