Piezoelectric biomimetic sensor for caffeine based on electrosynthesized polypyrrole

2004 ◽  
Author(s):  
S. Cabanilla ◽  
B.S. Ebarvia ◽  
F. Sevilla
Keyword(s):  
Biomimetic Sensor

scholarly journals Simultaneous Hydrolysis and Detection of Organophosphate by Benzimidazole Containing Ligand-Based Zinc(II) Complexes

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 714
Author(s):  
Gaber A. M. Mersal ◽  
Hamdy S. El-Sheshtawy ◽  
Mohammed A. Amin ◽  
Nasser Y. Mostafa ◽  
Amine Mezni ◽  
...  
Keyword(s):  
Square Wave Voltammetry ◽  
Limit Of Detection ◽  
Organophosphorus Compounds ◽  
Organophosphorus Pesticides ◽  
Carbon Paste ◽  
Square Wave ◽  
Wave Voltammetry ◽  
Carbon Past Electrode ◽  
Hydrolysis Of ◽  
Biomimetic Sensor

The agricultural use of organophosphorus pesticides is a widespread practice with significant advantages in crop health and product yield. An undesirable consequence is the contamination of soil and groundwater by these neurotoxins resulting from over application and run-off. Here, we design and synthesize the mononuclear zinc(II) complexes, namely, [Zn(AMB)2Cl](ClO4) 1 and [Zn(AMB)2(OH)](ClO4) 2 (AMB = 2-aminomethylbenzimidazole), as artificial catalysts inspired by phosphotriesterase (PTE) for the hydrolysis of organophosphorus compounds (OPs) and simultaneously detect the organophosphate pesticides such as fenitrothion and parathion. Spectral and DFT (B3LYP/Lanl2DZ) calculations revealed that complexes 1 and 2 have a square-pyramidal environment around zinc(II) centers with coordination chromophores of ZnN4Cl and ZnN4O, respectively. Both 1 and 2 were used as a modifier in the construction of a biomimetic sensor for the determination of toxic OPs, fenitrothion and parathion, in phosphate buffer by square wave voltammetry. The hydrolysis of OPs using 1 or 2 generates p-nitrophenol, which is subsequently oxidized at the surface of the modified carbon past electrode. The catalytic activity of 2 was higher than 1, which is attributed to the higher electronegativity of the former. The oxidation peak potentials of p-nitrophenol were obtained at +0.97 V (vs. Ag/AgCl) using cyclic voltammetry (CV) and +0.88 V (vs. Ag/AgCl) using square wave voltammetry. Several parameters were investigated to evaluate the performance of the biomimetic sensor obtained after the incorporation of zinc(II) complex 1 and 2 on a carbon paste electrode (CPE). The calibration curve showed a linear response ranging between 1.0 μM (0.29 ppm) and 5.5 μM (1.6 ppm) for fenitrothion and 1.0 μM (0.28 ppm) and 0.1 μM (0.028 ppm) for parathion with a limit of detection (LOD) of 0.08 μM (0.022 ppm) and 0.51 μM (0.149 ppm) for fenitrothion and parathion, respectively. The obtained results clearly demonstrated that the CPE modified by 1 and 2 has a remarkable electrocatalytic activity towards the hydrolysis of OPs under optimal conditions.

scholarly journals Catalytic molecularly imprinted polymer membranes: Development of the biomimetic sensor for phenols detection

2010 ◽  
Vol 659 (1-2) ◽  
pp. 274-279 ◽  
Author(s):  
T.A. Sergeyeva ◽  
O.A. Slinchenko ◽  
L.A. Gorbach ◽  
V.F. Matyushov ◽  
O.O. Brovko ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymer ◽  
Polymer Membranes ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Biomimetic Sensor

Molecular Imprinted Poly(Ethyleneco-Vinyl Alcohol) Nanofibers Electrospun on Gold Electrodes for Impedimetric Creatinine Sensing

2013 ◽  
Vol 543 ◽  
pp. 84-88 ◽  
Author(s):  
Amina Betatache ◽  
Mohamed Braiek ◽  
Jean François Chateaux ◽  
Florence Lagarde ◽  
Nicole Jaffrezic-Renault
Keyword(s):  
Vinyl Alcohol ◽  
Sensor Response ◽  
Gold Electrodes ◽  
Optimal Conditions ◽  
Imprinted Polymer ◽  
Electrical Voltage ◽  
Poly Ethylene ◽  
Biomimetic Sensor ◽  
Polymer Solvent

In this work, a biomimetic sensor elaborated by direct electrospinning of molecular imprinted poly (ethylene co-vinyl alcohol) (EVOH) onto gold electrodes was proposed for impedimetric creatinine detection. Dimethylsulfoxyde (DMSO) was selected as polymer solvent and creatinine (1% wt) was used as template. In the optimal conditions of fabrication (20% wt EVOH, electrical voltage: 20 kV, collection distance: 30 cm), the sensor response was proportional to log [creatinine concentratio in the 1 fg.L-1-1 μg.L-1 range. We also showed that the sensor could be reused at least three times and that the response of the non imprinted polymer control sensor, prepared the same way but in absence of creatinine, was very low.

scholarly journals Sandwiching Phosphorene with Iron Porphyrin Monolayer for High Stability and Its Biomimetic Sensor to Sensitively Detect Living Cell Released NO

2022 ◽  
pp. 2104066
Author(s):  
Chunmei Zhang ◽  
Fangxin Hu ◽  
Xijuan Hao ◽  
Qianghai Rao ◽  
Tao Hu ◽  
...  
Keyword(s):  
Living Cell ◽  
High Stability ◽  
Iron Porphyrin ◽  
Biomimetic Sensor

Electrochemical Detection of Fenthion Insecticide in Olive Oils by a Sensitive Non-Enzymatic Biomimetic Sensor Enhanced with Metal Nanoparticles

2021 ◽  
Vol 5 (1) ◽  
pp. 64
Author(s):  
Youssra Aghoutane ◽  
Nezha El Bari ◽  
Zoubida Laghrari ◽  
Benachir Bouchikhi
Keyword(s):  
Electrochemical Impedance ◽  
Differential Pulse ◽  
Organophosphate Insecticide ◽  
Imprinted Polymer ◽  
High Recovery ◽  
Molecularly Imprinted ◽  
Olive Oils ◽  
Pulse Voltammetry ◽  
Biomimetic Sensor

Fenthion, an organophosphate insecticide, is a cholinesterase inhibitor and is highly toxic. An electrochemical sensor based on molecularly imprinted polymer is developed here for its detection. For this purpose, 2-aminothiophenol mixed with gold nanoparticles was immobilized on screen-printed gold electrodes. The FEN pattern was then fixed before being covered with 2-aminothiophenol. Cyclic voltammetry, differential pulse voltammetry and electrochemical impedance spectroscopy methods were used for the electrochemical characterization. The low detection limit was 0.05 mg/Kg over a range of 0.01–17.3 µg/mL. The sensor was successfully applied for the determination of FEN in olive oil samples with high recovery values.

scholarly journals Application of a biomimetic sensor based on iron phthalocyanine chloride: 4-methylbenzylidene-camphor detection

2010 ◽  
Vol 21 (7) ◽  
pp. 1377-1383 ◽  
Author(s):  
Ana Carolina Boni ◽  
Maria D. P. T. Sotomayor ◽  
Marcos R. V. Lanza ◽  
Sônia Maria C. N. Tanaka ◽  
Auro A. Tanaka
Keyword(s):  
Iron Phthalocyanine ◽  
Biomimetic Sensor

scholarly journals Development of a smartphone-based biomimetic sensor for aflatoxin B1 detection using molecularly imprinted polymer membranes

Talanta ◽  
2019 ◽  
Vol 201 ◽  
pp. 204-210 ◽  
Author(s):  
Tetyana Sergeyeva ◽  
Daria Yarynka ◽  
Elena Piletska ◽  
Rostyslav Linnik ◽  
Olga Zaporozhets ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymer ◽  
Aflatoxin B1 ◽  
Polymer Membranes ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Biomimetic Sensor

Biomimetic Sensor for Dobutamine Employing Nano- TiO2/Nafion/Carbon Nanoparticles Modified Electrode

2015 ◽  
Vol 28 (5) ◽  
pp. 970-978 ◽  
Author(s):  
Saeed Shahrokhian ◽  
Masoumeh Ghalkhani ◽  
Razieh Kohansal ◽  
Rahim Mohammadi
Keyword(s):  
Modified Electrode ◽  
Carbon Nanoparticles ◽  
Nano Tio2 ◽  
Biomimetic Sensor
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