scholarly journals Thread- and Capillary Tube-Based Electrodes for the Detection of Glucose and Acetylthiocholine

Micromachines ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 920
Author(s):  
Kathryn Uchida ◽  
Lauren Duenas ◽  
Frank A. Gomez
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Sensor ◽  
Capillary Tube ◽  
Electrode System ◽  
Potassium Ferricyanide ◽  
The Other ◽  
Glucose Detection ◽  
Current Output ◽  
Nylon Thread ◽  
Phosphate Buffered Saline

An electrochemical sensor for the detection of glucose and acetylthiocholine (ATC) using thread- and capillary tube-based electrodes is described. Three nylon thread-based electrodes were fabricated by painting pieces of trifurcated nylon thread with conductive inks and threading the electrodes into capillary tubes. Two platforms, one paper-based and the other utilizing bubble wrap, were examined. For the glucose detection, a solution containing glucose oxidase (GOx), potassium ferricyanide (K3[Fe(CN)6]), and increasing concentrations of glucose (0–20 mM) in phosphate-buffered saline (PBS) was spotted onto the two platforms. Similarly, increasing concentrations of ATC (0–9.84 mg/mL) in acetylcholinesterase (AChE) (0.08 U/mL) and PBS solution were detected. Using cyclic voltammetry (CV), a scanning voltage was applied to yield a graph of voltage applied (V) vs. current output (A). For both platforms, both glucose and ATC concentrations were observed to be linearly proportional to the current output as demonstrated by the increased height of the oxidation peaks. The three-electrode system was simple to fabricate, inexpensive, and could be used for multiple readings.

scholarly journals Comparative Study of Ag Nanostructures: Molecular Simulations, Electrochemical Behavior, and Antibacterial Effect

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Álvaro de Jesús Ruíz-Baltazar ◽  
Simón Yobanny Reyes-López ◽  
D. Larrañaga ◽  
R. Pérez
Keyword(s):  
Cyclic Voltammetry ◽  
Ethylene Glycol ◽  
Comparative Study ◽  
Sodium Borohydride ◽  
Electrochemical Behavior ◽  
Antibacterial Effect ◽  
Chemical Reduction ◽  
Molecular Simulations ◽  
The Other ◽  
E Coli

Nanoparticles of Ag with different sizes and structures were obtained and studied. Two methods for reductions of Ag ions were employed, chemical reduction by sodium borohydride and ethylene glycol. Cuboctahedral and icosahedral structures were obtained. Molecular simulations were carried out in order to evaluate the reactivity of both structures. On the other hand, the electrochemical activity and antibacterial effect (E. coli) of the cuboctahedral and icosahedral structures were measured experimentally. The results obtained by molecular simulation, cyclic voltammetry, and antibacterial effect were compared and discussed in this work.

scholarly journals A new electrochemical sensor based on carbon paste electrode/Ru(III) complex for determination of nitrite: Electrochemical impedance and cyclic voltammetry measurements

Measurement ◽  
2016 ◽  
Vol 92 ◽  
pp. 524-533 ◽  
Author(s):  
Achour Terbouche ◽  
Siham Lameche ◽  
Chafia Ait-Ramdane-Terbouche ◽  
Djamila Guerniche ◽  
Djahida Lerari ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Sensor ◽  
Carbon Paste Electrode ◽  
Electrochemical Impedance ◽  
Carbon Paste ◽  
Paste Electrode

Glucose Molecularly Imprinted Electrochemical Sensor Based on Chitosan and Nickel Oxide Electrode

2014 ◽  
Vol 1052 ◽  
pp. 215-219 ◽  
Author(s):  
Huai Xiang Li ◽  
Wei Yao ◽  
Qiong Wu ◽  
Wen Sha Xia
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Sensor ◽  
Molecularly Imprinted Polymers ◽  
Glucose Measurement ◽  
Nickel Electrode ◽  
Oxide Electrode ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Nickel Oxide Electrode ◽  
Scanning Electron

In this work, A molecularly imprinted polymers (MIPs) electrochemical sensor based on chitosan (CS) and nickel electrode was constructed, finally used in glucose measurement. The MIPs sensor was prepared through electrodepositing glucose–CS composited film on the electrochemical treated nickel then removing glucose from the film via water elution. The morphology and electrochemical properties of the sensor were characterized via scanning electron microscope (SEM) , cyclic voltammetry (CV), respectively. Amperometric responses of the CS (MIP)-NiO electrode toward glucose was well-proportional to the concentration of the range from 10 μM to 200 μM. The developed sensor obtained the specific recognition to glucose against coexisting interferences such as oxalic acid, uric acid and ascorbic acid.

scholarly journals An Electrochemical Sensor Based On Graphite Electrode Modified With Silica Containing 1-N-Propyl-3-Methylimidazolium Species For Determination Of Ascorbic Acid

2019 ◽  
Vol Vol. 14, No.1 ◽  
pp. 5-14 ◽  
Author(s):  
Anastasiya Tkachenko ◽  
Mykyta Onizhuk ◽  
Oleg Tkachenko ◽  
Leliz T. Arenas ◽  
Edilson V. Benvenutt ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Cyclic Voltammetry ◽  
Electrochemical Sensor ◽  
Electrochemical Impedance ◽  
Limit Of Detection ◽  
Pharmaceutical Formulations ◽  
Differential Pulse ◽  
Long Term Stability ◽  
Diffusion Limited

In the present study, an electrochemical sensor based on the electrode (SiMImCl/C) consisting of graphite and silica, grafted with 1-n-propyl-3-methylimidazolium chloride was used for ascorbic acid (AA) quantification in pharmaceuticals and food formulations. Cyclic voltammetry and electrochemical impedance spectroscopy were applied for electrochemical characterization of the SiMImCl/C electrode. The cyclic voltammetry study revealed that the oxidation of AA on this electrode is an irreversible process, realized by adsorption and diffusion limited step. The differential pulse voltammetry was applied to develop a procedure for the AA determination. The linear range was found to be 0.3–170 μmol L-1 and the limit of detection – 0.1 μmol L-1. The proposed SiMImCl/C electrode has long term stability and does not show electrochemical activity towards the analytes, which commonly coexist with AA. The sensor was successfully used for quantification of AA in food and pharmaceutical formulations.

A novel electrochemical sensor for glucose detection based on Ag@ZIF-67 nanocomposite

2018 ◽  
Vol 260 ◽  
pp. 852-860 ◽  
Author(s):  
Wei Meng ◽  
Yuanyuan Wen ◽  
Lei Dai ◽  
Zhangxing He ◽  
Ling Wang
Keyword(s):  
Electrochemical Sensor ◽  
Glucose Detection

A high-performance Co-MOF non-enzymatic electrochemical sensor for glucose detection

2021 ◽  
Author(s):  
Zhen-Zhen Ma ◽  
Yao Ma ◽  
Bing Liu ◽  
Ling Xu ◽  
Huan Jiao
Keyword(s):  
Electrochemical Sensor ◽  
Terephthalic Acid ◽  
High Performance ◽  
Metal Organic Frameworks ◽  
Deep Eutectic Solvents ◽  
Cobalt Metal ◽  
Glucose Detection ◽  
Metal Organic

Two cobalt metal-organic frameworks (Co-MOFs), [Ch]2[Co3(BDC)3Cl2] (1) and [Ch]2[Co3(BDC)4]·2DMU (2) (Ch+ = choline cation; H2BDC = terephthalic acid; DMU = 1,3-dimethylurea), were prepared through ionothermal reactions with deep eutectic solvents...

scholarly journals Cu(I) Coordination Complex Precursor for Randomized CuOx Microarray Loaded on Carbon Nanofiber with Excellent Electrocatalytic Performance for Electrochemical Glucose Detection

Sensors ◽  
2019 ◽  
Vol 19 (24) ◽  
pp. 5353
Author(s):  
Sorina Motoc ◽  
Carmen Cretu ◽  
Otilia Costisor ◽  
Anamaria Baciu ◽  
Florica Manea ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Glucose Oxidation ◽  
Carbon Nanofiber ◽  
Limit Of Detection ◽  
Electrochemical Treatment ◽  
Open Circuit ◽  
Coordination Complex ◽  
Glucose Detection ◽  
Optimized Conditions ◽  
Paste Electrode

A homoleptic ionic Cu(I) coordination complex that was based on 2,2′-biquinoline ligand functionalized with long alkyl chains (Cu(I)–C18) was used as a precursor to modify a carbon nanofiber paste electrode (Cu–C18/CNF). Randomized copper oxide microelectrode arrays dispersed within carbon nanofiber paste (CuOx/CNF) were obtained by electrochemical treatment of Cu–C18/CNF while using cyclic voltammetry (CV). The CuOx/CNF exhibited high electrocatalytic activity towards glucose oxidation at +0.6 V and +1.2 V vs. Ag/AgCl. Infrared Spectroscopy (FTIR) and scanning electron microscopy (SEM) characterized the electrodes composition. Cyclic voltammetry (CV), square wave-voltammetry (SWV), and multiple-pulsed amperometry (MPA) techniques provided optimized conditions for glucose oxidation and detection. A preconcentration step that involved 10 minutes accumulation at open circuit potential before SWV running led to the lowest limit of detection and the highest sensitivity for glucose detection (5419.77 µA·mM−1·cm−2 at + 1.1 V vs. Ag/AgCl) vs. Cu-based electrodes reported to date in literature.

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