scholarly journals Non-enzymatic glucose sensor with electrodeposited silver/carbon nanotubes composite electrode

2019 ◽  
Vol 39 (6) ◽  
Author(s):  
Syeda Ammara Shabbir ◽  
Sana Tariq ◽  
M. Gul Bahar Ashiq ◽  
Waqar A. Khan
Keyword(s):  
Carbon Nanotubes ◽  
Tin Oxide ◽  
Composite Electrode ◽  
Reduction Potential ◽  
Glucose Sensor ◽  
Electrochemical Process ◽  
Glucose Sensors ◽  
Functionalized Carbon Nanotubes ◽  
Good Electrocatalytic Activity ◽  
Free Glucose

Abstract Diabetes mellitus is a debilitating disease that affects each and every organ of human body. Hence it is important to continuously monitor the glucose level throughout the day and night. Glucose sensors are in great demand due to a rapid increase in diabetic community. A strategy has been implemented here to fabricate silver nanoparticles (AgNPs) with the support of functionalized carbon nanotubes (f-CNTs). Silver/carbon nanotubes (Ag/CNTs) nanocomposite electrode have been prepared by electrochemical process on Fluorine doped tin oxide (FTO) glass, by varying silver (Ag) concentrations for non-enzymatic glucose sensor. The variable Ag concentration in the morphology of Ag/CNTs nanocomposite has influenced the electrical conductivity, oxidation and reduction potential and electrochemical activity of glucose. Highest current density and good electrocatalytic activity for electrodes are obtained at 70 mM concentration of silver in Ag/CNTs composite. The present study indicates that the Ag/CNTs electrode is a possible substitute of the expensive glassy carbon electrode for enzyme-free glucose sensors.

Enzyme-Free Glucose Sensor Based on Au Nanobouquet Fabricated Indium Tin Oxide Electrode

2014 ◽  
Vol 14 (11) ◽  
pp. 8432-8438 ◽  
Author(s):  
Jin-Ho Lee ◽  
Waleed Ahmed El-Said ◽  
Byung-Keun Oh ◽  
Jeong-Woo Choi
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Glucose Sensor ◽  
Oxide Electrode ◽  
Indium Tin Oxide Electrode ◽  
Free Glucose

scholarly journals A Flexible Platform of Electrochemically Functionalized Carbon Nanotubes for NADH Sensors

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 518 ◽  
Author(s):  
Aranzazu Heras ◽  
Fabio Vulcano ◽  
Jesus Garoz-Ruiz ◽  
Nicola Porcelli ◽  
Fabio Terzi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Direct Evidence ◽  
Electrode System ◽  
Electrochemical Process ◽  
Organic Residues ◽  
Flexible Electrode ◽  
Functionalized Carbon Nanotubes ◽  
Solution Interface ◽  
Sensor Platform ◽  
Walled Carbon Nanotubes

A flexible electrode system entirely constituted by single-walled carbon nanotubes (SWCNTs) has been proposed as the sensor platform for β-nicotinamide adenine dinucleotide (NADH) detection. The performance of the device, in terms of potential at which the electrochemical process takes place, significantly improves by electrochemical functionalization of the carbon-based material with a molecule possessing an o-hydroquinone residue, namely caffeic acid. Both the processes of SWCNT functionalization and NADH detection have been studied by combining electrochemical and spectroelectrochemical experiments, in order to achieve direct evidence of the electrode modification by the organic residues and to study the electrocatalytic activity of the resulting material in respect to functional groups present at the electrode/solution interface. Electrochemical measurements performed at the fixed potential of +0.30 V let us envision the possible use of the device as an amperometric sensor for NADH detection. Spectroelectrochemistry also demonstrates the effectiveness of the device in acting as a voltabsorptometric sensor for the detection of this same analyte by exploiting this different transduction mechanism, potentially less prone to the possible presence of interfering species.

Affinity Viscosimetry Sensor for Enzyme Free Detection of Glucose in a Micro-Bioreaction Chamber

2016 ◽  
Vol 879 ◽  
pp. 1135-1140
Author(s):  
Thilo Liebscher ◽  
Franziska Glös ◽  
Andrea Böhme ◽  
M. Birkholz ◽  
M. di Vona ◽  
...  
Keyword(s):  
Glucose Concentration ◽  
Glucose Sensor ◽  
Time Measurement ◽  
Glucose Sensors ◽  
Cell Cultivation ◽  
New Approach ◽  
Microelectromechanical System ◽  
Long Time ◽  
Free Glucose

With the growing demand of miniaturization of cell cultivation a new approach towards measuring and sensing bio-analytes needs to be made due to the problem of small volumes (less than 150μl) containing small amounts of analytes. Most of the available glucose sensors monitor the glucose concentration with the help of enzymes, which become very inaccurate in terms of long time measurement and uses (i.e. consumes) glucose during the measurement becoming not available anymore for the cells. Therefore, we focused on applying an enzyme-free glucose sensor based on a microelectromechanical system (MEMS).

Preparation, Characterization and Applications of Enzyme-Free Glucose Sensors

2017 ◽  
Vol 730 ◽  
pp. 172-176
Author(s):  
Jing Chao Hong ◽  
Gu Qin
Keyword(s):  
Glucose Sensor ◽  
Electrochemical Biosensor ◽  
Glucose Sensors ◽  
Fourth Generation ◽  
Preparation Methods ◽  
Great Progress ◽  
Free Glucose ◽  
New Material ◽  
Application Fields

With the continuous development of science and technology, the function of the electrochemical biosensor is becoming more and more diversified. The fourth generation of enzyme-free glucose sensor because of its particular advantages has become one of research focuses in glucose sensor now. For all sorts of optimization also are not enzyme glucose as the new material was born has made great progress. Enzyme-free glucose sensors are becoming more and more an integral part of electrochemical research. This article summarizes the characteristics of all kinds of conventional materials of enzyme-free glucose sensor, the domestic and foreign general preparation methods of enzyme-free glucose sensors, the specific characterization of the electrode, its application fields, and prospects for future development.

scholarly journals Fabrication of Nonenzymatic Glucose Sensors Based on Multiwalled Carbon Nanotubes with Bimetallic Pt-M (M = Ru and Sn) Catalysts by Radiolytic Deposition

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Sun-Young Kwon ◽  
Hai-Doo Kwen ◽  
Seong-Ho Choi
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Glucose Sensor ◽  
Glucose Sensors ◽  
X Ray Diffraction ◽  
Multiwalled Carbon ◽  
Ru Catalyst ◽  
Electrochemical Testing ◽  
The Common ◽  
Alloy Properties

Nonenzymatic glucose sensors employing multiwalled carbon nanotubes (MWNTs) with highly dispersed Pt-M (M = Ru and Sn) nanoparticles (Pt-M@PVP-MWNTs) were fabricated by radiolytic deposition. The Pt-M nanoparticles on the MWNTs were characterized by transmittance electron microscopy, elemental analysis, and X-ray diffraction. They were found to be well dispersed and to exhibit alloy properties on the MWNT support. Electrochemical testing showed that these nonenzymatic sensors had larger currents (mA) than that of a bare glassy carbon (GC) electrode and one modified with MWNTs. The sensitivity (A mM−1), linear range (mM), and detection limit (mM) (S/N = 3) of the glucose sensor with the Pt-Ru catalyst in NaOH electrolyte were determined as 18.0, 1.0–2.5, 0.7, respectively. The corresponding data of the sensor with Pt-Sn catalyst were 889.0, 1.00–3.00, and 0.3, respectively. In addition, these non-enzymatic sensors can effectively avoid interference arising from the oxidation of the common interfering species ascorbic acid and uric acid in NaOH electrolyte. The experimental results show that such sensors can be applied in the detection of glucose in commercial red wine samples.

Sign in / Sign up

Export Citation Format

Share Document