Enzymatic glucose biosensor based on bismuth nanoribbons electrochemically deposited on reduced graphene oxide

2015 ◽  
Vol 182 (13-14) ◽  
pp. 2165-2172 ◽  
Author(s):  
Rajkumar Devasenathipathy ◽  
Raj Karthik ◽  
Shen-Ming Chen ◽  
Mohammad Ajmal Ali ◽  
Veerappan Mani ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Glucose Biosensor ◽  
Reduced Graphene ◽  
Electrochemically Deposited

scholarly journals Electrodeposition–Assisted Assembled Multilayer Films of Gold Nanoparticles and Glucose Oxidase onto Polypyrrole-Reduced Graphene Oxide Matrix and Their Electrocatalytic Activity toward Glucose

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 993 ◽  
Author(s):  
Baoyan Wu ◽  
Shihua Hou ◽  
Yongyong Xue ◽  
Zhan Chen
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Glucose Oxidase ◽  
Reduced Graphene Oxide ◽  
Self Assembly ◽  
Electrocatalytic Activity ◽  
Multilayer Films ◽  
Glucose Biosensor ◽  
Future Design ◽  
Reduced Graphene

The study reports a facile and eco-friendly approach for nanomaterial synthesis and enzyme immobilization. A corresponding glucose biosensor was fabricated by immobilizing the gold nanoparticles (AuNPs) and glucose oxidase (GOD) multilayer films onto the polypyrrole (PPy)/reduced graphene oxide (RGO) modified glassy carbon electrode (GCE) via the electrodeposition and self-assembly. PPy and graphene oxide were first coated on the surface of a bare GCE by the electrodeposition. Then, AuNPs and GOD were alternately immobilized onto PPy-RGO/GCE electrode using the electrodeposition of AuNPs and self-assembly of GOD to obtain AuNPs-GOD multilayer films. The resulting PPy-RGO-(AuNPs-GOD)n/GCE biosensors were used to characterize and assess their electrocatalytic activity toward glucose using cyclic voltammetry and amperometry. The response current increased with the increased number of AuNPs-GOD layers, and the biosensor based on four layers of AuNPs-GOD showed the best performance. The PPy-RGO-(AuNPs-GOD)4/GCE electrode can detect glucose in a linear range from 0.2 mM to 8 mM with a good sensitivity of 0.89 μA/mM, and a detection limit of 5.6 μM (S/N = 3). This study presents a promising eco-friendly biosensor platform with advantages of electrodeposition and self-assembly, and would be helpful for the future design of more complex electrochemical detection systems.

Electrodeposition of copper oxide/polypyrrole/reduced graphene oxide as a nonenzymatic glucose biosensor

2015 ◽  
Vol 209 ◽  
pp. 100-108 ◽  
Author(s):  
Pooria Moozarm Nia ◽  
Woi Pei Meng ◽  
Farnaz Lorestani ◽  
M.R. Mahmoudian ◽  
Y. Alias
Keyword(s):  
Graphene Oxide ◽  
Copper Oxide ◽  
Reduced Graphene Oxide ◽  
Glucose Biosensor ◽  
Reduced Graphene

Fabrication of a novel disposable glucose biosensor using an electrochemically reduced graphene oxide–glucose oxidase biocomposite

2016 ◽  
Vol 8 (38) ◽  
pp. 6974-6981 ◽  
Author(s):  
Kathiresan Vijayaraj ◽  
Suck Won Hong ◽  
Sung-Ho Jin ◽  
Seung-Cheol Chang ◽  
Deog-Su Park
Keyword(s):  
Graphene Oxide ◽  
Glucose Oxidase ◽  
Reduced Graphene Oxide ◽  
Electrochemical Method ◽  
Graphite Electrode ◽  
Cost Effective ◽  
Glucose Biosensor ◽  
Pencil Graphite Electrode ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide

A disposable glucose biosensor has been fabricated on the surface of a cost-effective pencil graphite electrode (PGE) by an electrochemical method, using glucose oxidase (GOx) and reduced graphene oxide (rGO).

scholarly journals Reduced Graphene Oxide Carbon Yarn Electrodes for Drug Sensing

2021 ◽  
Vol 2 ◽  
Author(s):  
Sutthima Sriprasertsuk ◽  
Shuai Zhang ◽  
Gordon Wallace ◽  
Jun Chen ◽  
John R. Varcoe ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Detection Limit ◽  
Carbon Fibre ◽  
Reduced Graphene Oxide ◽  
Simultaneous Detection ◽  
Differential Pulse ◽  
Reduced Graphene ◽  
Electrochemically Deposited ◽  
Pulse Voltammetry

A modified carbon fibre yarn sensor was developed for the voltammetric determination of paracetamol and its interferents (dopamine and ascorbic acid). Reduced graphene oxide (rGO) was electrochemically deposited onto a carbon fibre yarn. Further modification was achieved using polypyrrole (PPy) coated onto the rGO carbon fibre yarn via electropolymerisation of pyrrole with cyclic voltammetry (CV). The surface of the rGO and PPy-rGO carbon fibre electrodes were characterised using Raman spectroscopy and scanning electron microscopy. The rGO and PPy-rGO carbon fibres had a 3.5-fold and 7-fold larger electrochemical surface area compared to bare carbon fibre (calculated using the Randles-Sevcik equation). Two clearly distinguished oxidation peaks at 0.49 and 0.25 V (vs. Ag/AgCl) were observed at the rGO fibre electrode during the simultaneous detection of paracetamol and dopamine, respectively, by CV. The detection limit (3σ S/N) of the rGO carbon fibre electrode for differential pulse voltammetry (DPV) determination of paracetamol was at 21.1 and 6.0 µM for dopamine. In comparison, the simultaneous determination of paracetamol and dopamine by CV at the PPy-rGO fibre electrode gave oxidation peaks of paracetamol and dopamine at 0.55 and 0.25 V (vs. Ag/AgCl), respectively. The detection limit (3σ S/N) for paracetamol was notably improved to 3.7 µM and maintained at 6.0 µM for dopamine at the PPy-rGO carbon fibre electrode during DPV.

scholarly journals Reduced Graphene Oxide and Polyaniline Nanofibers Nanocomposite for the Development of an Amperometric Glucose Biosensor

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 948
Author(s):  
Anton Popov ◽  
Ruta Aukstakojyte ◽  
Justina Gaidukevic ◽  
Viktorija Lisyte ◽  
Asta Kausaite-Minkstimiene ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Limit Of Detection ◽  
Thermal Reduction ◽  
Glucose Biosensor ◽  
Practical Application ◽  
X Ray Diffraction ◽  
Glucose Determination ◽  
Reduced Graphene ◽  
Graphite Rod

The control of glucose concentration is a crucial factor in clinical diagnosis and the food industry. Electrochemical biosensors based on reduced graphene oxide (rGO) and conducting polymers have a high potential for practical application. A novel thermal reduction protocol of graphene oxide (GO) in the presence of malonic acid was applied for the synthesis of rGO. The rGO was characterized by scanning electron microscopy, X-ray diffraction analysis, Fourier-transform infrared spectroscopy, and Raman spectroscopy. rGO in combination with polyaniline (PANI), Nafion, and glucose oxidase (GOx) was used to develop an amperometric glucose biosensor. A graphite rod (GR) electrode premodified with a dispersion of PANI nanostructures and rGO, Nafion, and GOx was proposed as the working electrode of the biosensor. The optimal ratio of PANI and rGO in the dispersion used as a matrix for GOx immobilization was equal to 1:10. The developed glucose biosensor was characterized by a wide linear range (from 0.5 to 50 mM), low limit of detection (0.089 mM), good selectivity, reproducibility, and stability. Therefore, the developed biosensor is suitable for glucose determination in human serum. The PANI nanostructure and rGO dispersion is a promising material for the construction of electrochemical glucose biosensors.

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