scholarly journals Nonenzymatic Glucose Biosensors Based on Silver Nanoparticles Deposited on TiO2Nanotubes

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Zheng Li ◽  
Yong Zhang ◽  
Jiaye Ye ◽  
Meiqing Guo ◽  
Jing Chen ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Differential Pulse Voltammetry ◽  
Glucose Oxidation ◽  
Chemical Reduction ◽  
Differential Pulse ◽  
Glucose Biosensor ◽  
Ag Nps ◽  
Nonenzymatic Biosensor ◽  
Structure Morphology ◽  
Pulse Voltammetry

In the present research, a nonenzymatic glucose biosensor was fabricated by depositing Ag nanoparticles (Ag-NPs) using in situ chemical reduction method on TiO2nanotubes which were synthesized by anodic oxidation process. The structure, morphology, and mechanical behaviors of electrode were examined by scanning electron microscopy and nanoindentation. It was found that Ag-NPs remained both inside and outside of TiO2nanotubes whose length and diameter were about 1.2 μm and 120 nm. The composition was constructed as an electrode of nonenzymatic biosensor for glucose oxidation. The electrocatalytic properties of the prepared electrodes for glucose oxidation were investigated by cyclic voltammetry (CVs) and differential pulse voltammetry (DPV). Compared with bare TiO2and Ag-fresh TiO2nanotube, Ag-TiO2/(500°C) nanotube exhibited the best electrochemical properties from cyclic voltammetry (CVs) results. Differential pulse voltammetry (DPV) results showed that, at +0.03 V, the sensitivity of the electrode to glucose oxidation was3.69 mA⁎cm-2⁎mM-1with a linear range from 20 mM to 190 mM and detection limit of 24 μM (signal-to-voice ratio of 3). In addition the nonenzymatic glucose sensors exhibited excellent selectivity, stability, and repeatability.

scholarly journals Synthesis and electrochemical characterization of substituted indolizine carboxylates

2013 ◽  
Vol 78 (6) ◽  
pp. 827-838 ◽  
Author(s):  
Maria-Laura Soare ◽  
Eleonora-Mihaela Ungureanu ◽  
Emilian Georgescu ◽  
Liviu Birzan
Keyword(s):  
Cyclic Voltammetry ◽  
Differential Pulse Voltammetry ◽  
Electrochemical Behaviour ◽  
Substituent Effects ◽  
Detailed Comparison ◽  
Differential Pulse ◽  
Synthesis And Characterization ◽  
Redox Processes ◽  
Pulse Voltammetry

This work is devoted to the synthesis and characterization of new indolizine derivatives. Particular attention was paid to the electrochemical investigations by cyclic voltammetry and differential pulse voltammetry. The redox processes for each compound were established, analyzed and assessed to the particular functional groups at which they take place. This assessment was based on detailed comparison between the electrochemical behaviour of the compounds, similarities in their structure, as well as substituent effects.

Dual-mode label-free electrochemical immunosensor for ultrasensitive detection of procalcitonin based on g-C3N4-NiCo2S4-CNTs-Ag NPs

The Analyst ◽  
2021 ◽  
Author(s):  
Xiaoting Xu ◽  
Xuan Li ◽  
Juncong Miao ◽  
Lei Liu ◽  
Xinyi Huang ◽  
...  
Keyword(s):  
Differential Pulse Voltammetry ◽  
Differential Pulse ◽  
Electrochemical Immunosensor ◽  
Mode Analysis ◽  
Quantitative Detection ◽  
Ultrasensitive Detection ◽  
Label Free ◽  
Dual Mode ◽  
Ag Nps ◽  
Pulse Voltammetry

Herein, a label-free electrochemical immunosensor which based on Differential Pulse Voltammetry (DPV) and Amperometric i-t curve (i-t) dual-mode analysis is proposed for early quantitative detection of procalcitonin (PCT). Thanks to...

scholarly journals Simultaneous detection of dopamine, tyrosine and ascorbic acid using NiO/graphene modified graphite electrode

2020 ◽  
Vol 10 (3) ◽  
pp. 5599-5609 ◽  
Keyword(s):  
Ascorbic Acid ◽  
Cyclic Voltammetry ◽  
Differential Pulse Voltammetry ◽  
Modified Electrode ◽  
Graphite Electrode ◽  
Simultaneous Detection ◽  
Oxidation Mechanism ◽  
Differential Pulse ◽  
Peak Potential ◽  
Pulse Voltammetry

In this work, an electrochemical sensor is fabricated by decorating the surface of graphite electrode with NiO/graphene (NGMG) nanoparticles and employed for the detection of dopamine (DA), tyrosine (Tyr) and ascorbic acid (AA). The structure and morphology of prepared NiO nanoparticles are examined by XRD,SEM, FTIR and Raman techniques. The electrochemical properties have been investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and chronoamperommety. The modified electrode is prepared by a simple drop casting method. The electrode shows good electro catalyticactivity towards oxidation of DA, Tyr and AA. It successfully separates the oxidation current signals of AA, DA and Tyr into clearly visible three distinct oxidation peaks compared to a single, overlapped oxidative peak on bare graphite electrode. The peak potential difference between AA-DA, DA-Tyr and AA-Tyr is 228 mV, 303 mV and 565 mV respectively in cyclic voltammetry (CV) studies and the corresponding peak potential separations are 243 mV, 318 mV and 561 mV respectively in differential pulse voltammetry (DPV). It is found that oxidation mechanism of DA, AA and Tyr on NGMG are different owing to a different type of interaction of the modified layer with the bio-analytes. The modified electrode, NGMG has high selectivity and sensitivity in addition to other factors like low cost, convenient and a hassle free electrochemical method for simultaneous determination of DA, AA and Tyr in their ternary mixture.

Detailed study of interactions between eosin yellow and gemini pyridinium surfactants

RSC Advances ◽  
2016 ◽  
Vol 6 (75) ◽  
pp. 71692-71704 ◽  
Author(s):  
Renu Sharma ◽  
Ajar Kamal ◽  
Rakesh Kumar Mahajan
Keyword(s):  
Cyclic Voltammetry ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Differential Pulse Voltammetry ◽  
Differential Pulse ◽  
Pulse Voltammetry ◽  
Uv Visible ◽  
Eosin Yellow

Interactions of dianionic dye, eosin yellow with gemini pyridinium surfactants have been investigated using conductivity, UV-visible, fluorescence, cyclic voltammetry, differential pulse voltammetry, potentiometry and dynamic light scattering.

scholarly journals Promotion Effect of Palladium on BiVO4 Sensing Material for Epinephrine Detection

Catalysts ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1083
Author(s):  
Hsiang-Ning Luk ◽  
Tsong-Yung Chou ◽  
Bai-Hao Huang ◽  
Yu-Syuan Lin ◽  
Hui Li ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Differential Pulse Voltammetry ◽  
Detection System ◽  
Differential Pulse ◽  
Electrochemical Sensing ◽  
X Ray Diffraction ◽  
Sensing Material ◽  
Transmission Electron ◽  
Pulse Voltammetry ◽  
Epinephrine Concentration

In this study, the Pd/BiVO4 composite was prepared by hydrothermal method as an electrochemical sensing material for epinephrine. X-ray diffraction, scanning electron microscopy, and a transmission electron microscope were used to characterize the samples. In the electrochemical detection system, cyclic voltammetry and differential pulse voltammetry were applied to measure the concentration of the epinephrine solution (0.9–27.5 µM) with the Pd/BiVO4-coated glassy carbon electrode. As a result, the oxidation peak current of Pd/BiVO4/GCE demonstrated good linearity with the epinephrine concentration. The detection limit of the epinephrine concentration by cyclic voltammetry and differential pulse voltammetry were 0.262 µM and 0.154 µM, respectively. Additionally, the proposed sensing material exhibited good reproducibility, stability, and selectivity. A plausible sensing mechanism was proposed.

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