A fully microfabricated carbon nanotube three-electrode system on glass substrate for miniaturized electrochemical biosensors

2012 ◽  
Vol 14 (3) ◽  
pp. 613-624 ◽  
Author(s):  
Joon Hyub Kim ◽  
Jun-Yong Lee ◽  
Joon-Hyung Jin ◽  
Chan Won Park ◽  
Cheol Jin Lee ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Glass Substrate ◽  
Electrode System ◽  
Electrochemical Biosensors

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

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.

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

2018 ◽  
Vol 775 ◽  
pp. 283-288
Author(s):  
Leandre Emile D. Apostol ◽  
Jose Victor O. Sacueza ◽  
John Paul Klien Zeus S. Visaya ◽  
Franz Kevin B. Manalo ◽  
Emmanuel A. Florido
Keyword(s):  
Carbon Nanotube ◽  
Copper Chloride ◽  
Copper Ion ◽  
Electrical Characterization ◽  
High Sensitivity ◽  
Electrode System ◽  
Rice Hull ◽  
Voltage Response ◽  
Ion Sensing ◽  
Voltage Relationship

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.

Single wall carbon nanotube electrode system capable of quantitative detection of CD4 + T cells

2017 ◽  
Vol 90 ◽  
pp. 238-244 ◽  
Author(s):  
Joonhyub Kim ◽  
Gayoung Park ◽  
Seoho Lee ◽  
Suk-Won Hwang ◽  
Namki Min ◽  
...  
Keyword(s):  
T Cells ◽  
Carbon Nanotube ◽  
Cd4 T Cells ◽  
Electrode System ◽  
Quantitative Detection ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon

scholarly journals Facile Fabrication of Single-Walled Carbon Nanotube/Anatase Composite Thin Film on Quartz Glass Substrate for Translucent Conductive Photoelectrode

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3352
Author(s):  
Yutaka Suwazono ◽  
Takuro Murayoshi ◽  
Hiroki Nagai ◽  
Mitsunobu Sato
Keyword(s):  
Thin Film ◽  
Carbon Nanotube ◽  
Quartz Glass ◽  
Glass Substrate ◽  
Composite Thin Film ◽  
Precursor Film ◽  
Quartz Glass Substrate ◽  
Single Walled Carbon Nanotube ◽  
X Ray ◽  
Single Walled Carbon

A single-walled carbon nanotube/anatase (SWCNT/anatase) composite thin film with a transmittance of over 70% in the visible-light region was fabricated on a quartz glass substrate by heat treating a precursor film at 500 °C in air. The precursor film was formed by spin coating a mixed solution of the titania molecular precursor and well-dispersed SWCNTs (0.075 mass%) in ethanol. The anatase crystals and Ti3+ ions in the composite thin films were determined by X-ray diffraction and X-ray photoelectron spectroscopy, respectively. The effect of the heating process on the SWCNTs was analyzed using Raman spectroscopy. The composite film showed an even surface with a scratch resistance of 4H pencil hardness, as observed using field-emission scanning electron microscopy and atomic force microscopy. The electrical resistivity and optical bandgap energy of the composite thin film with a thickness of 100 nm were 6.6 × 10−2 Ω cm and 3.4 eV, respectively, when the SWCNT content in the composite thin film was 2.9 mass%. An anodic photocurrent density of 4.2 μA cm−2 was observed under ultraviolet light irradiation (16 mW cm−2 at 365 nm) onto the composite thin film, thus showing excellent properties as a photoelectrode without conductive substrates.

scholarly journals Progress in Carbon Nanotube-Based Electrochemical Biosensors – A Review

2019 ◽  
Vol 8 (2) ◽  
Author(s):  
A.T. Lawal ◽  
H.S. Bolarinwa ◽  
L.O. Animasahun ◽  
M.D. Adeoye ◽  
I.O. Abdulsalami ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ascorbic Acid ◽  
Uric Acid ◽  
Carbon Nanotube ◽  
Metal Ions ◽  
Synthetic Methods ◽  
Electrochemical Biosensors ◽  
Future Developments ◽  
The Past ◽  
Structures And Properties

The use of carbon nanotubes (CNT) for fabrication of sensors and biosensors has increased considerably over the past decade. This review covers the progress and advances made during the years (2014-2018) in the utilisation of carbon nanotubes for fabrication of electrochemical biosensors. The focus of the review is on reported CNT-based biosensors for detection of, important substances, such as glucose, H2O2, (DNA), ascorbic acid, uric acid, dopamine, metal ions, and pesticides. The review starts by first discussing the structures and properties of CNTs, followed by discussion of some of the synthetic methods for CNTs preparation. The working principles and performances of CNT-based biosensors are then discussed. Considerations for future developments in CNT-based biosensors are also outlined.

Carbon nanotube-based electrochemical biosensors for determination of Candida albicans’s quorum sensing molecule

2017 ◽  
Vol 244 ◽  
pp. 565-570 ◽  
Author(s):  
Rabeay Y.A. Hassan ◽  
Rehab O. El-Attar ◽  
Hassan N.A. Hassan ◽  
Mona A. Ahmed ◽  
Elmorsy Khaled
Keyword(s):  
Carbon Nanotube ◽  
Quorum Sensing ◽  
Electrochemical Biosensors ◽  
Quorum Sensing Molecule
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