scholarly journals Hollow Gold Nanoshell Modified Electrode as Electrochemical Biosensor for Hemoglobin and Its Analytical Application

2021 ◽  
pp. 210219
Author(s):  
Xiaoqing Li ◽  
Keyword(s):  
Modified Electrode ◽  
Electrochemical Biosensor ◽  
Analytical Application ◽  
Gold Nanoshell

The Electrochemical Biosensor Based on the Immobilization of Horseradish Peroxidase on TiO2 Nanoneedles Modified Electrodes

2011 ◽  
Vol 239-242 ◽  
pp. 2499-2502
Author(s):  
Nan Nan Wei ◽  
Jiang Yan Du
Keyword(s):  
Horseradish Peroxidase ◽  
Modified Electrode ◽  
Electrochemical Biosensor ◽  
Signal To Noise Ratio ◽  
Direct Electron Transfer ◽  
Modified Electrodes ◽  
Signal To Noise ◽  
Formal Potential ◽  
Amperometric Response ◽  
Transfer Study

A new electrochemical biosensor based on the immobilization of horseradish peroxidase(HRP) on TiO2 nanoneedles modified electrodes has been fabricated. The direct electrochemical response of HRP immobilized on the modified electrode was dramatically enhanced. The immobilized HRP displayed a couple of stable and well-defined redox peaks with a formal potential of -0.379 V (vs. SCE). The HRP/TiO2 nanoneedles modified electrode exhibited a remarkable electrocatalytic activity toward the oxidation of H2O2. The amperometric response to H2O2 showed a linear range of 4–700μmol/L, with the calculated detection limit of 0.78 μmol/L at a signal-to-noise ratio of three. The modified electrode displayed an acceptable reproducibility and good stability. The new HRP/TiO2 nanoneedles matrix is expected to have wide applications for enzymes and proteins immobilization and direct electron transfer study and opened a way for low conductivity electrode biosensors.

Optimization Design of Electrochemical Biosensors Based on Gold Nanomaterials

2020 ◽  
Vol 12 (9) ◽  
pp. 1079-1086
Author(s):  
Haitao Hao
Keyword(s):  
Modified Electrode ◽  
Optimization Design ◽  
Electrochemical Biosensor ◽  
Design Method ◽  
High Sensitivity ◽  
Dna Biosensor ◽  
Gold Nanorod ◽  
Simple Preparation ◽  
Optimal Design Method ◽  
Gold Nanomaterials

At present, chemical biosensors still have poor reproducibility and stability due to that the density of nanomaterials particles is not ideal. Therefore, an optimal design method of electrochemical biosensor based on gold nanomaterials is proposed. Two types of sensors, namely DNA biosensor and immune biosensor, were designed in this work. A DNA biosensor with gold nanorod nanocomposite modified electrode was prepared, and its electrical activity was measured by Methylene blue. In contrast, an electrochemical immune sensor with gold nanorod-modified electrode was prepared and used for detection of alpha fetoprotein. The experimental results show that the designed DNA biosensor and electrochemical immune sensor have the advantages of simple preparation, high sensitivity, good selectivity and good stability.

An electrochemical biosensor based on hemoglobin-oligonucleotides-modified electrode for detection of acrylamide in potato fries

2019 ◽  
Vol 271 ◽  
pp. 54-61 ◽  
Author(s):  
Maryam Asnaashari ◽  
Reza Esmaeilzadeh Kenari ◽  
Reza Farahmandfar ◽  
Khalil Abnous ◽  
Seyed Mohammad Taghdisi
Keyword(s):  
Modified Electrode ◽  
Electrochemical Biosensor
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