scholarly journals An enzymatic glucose detection sensor using ZnO nanostructure

MRS Advances ◽  
2016 ◽  
Vol 1 (13) ◽  
pp. 847-853 ◽  
Author(s):  
Mohammed Marie ◽  
Sanghamitra Mandal ◽  
Omar Manasreh
Keyword(s):  
Glucose Sensor ◽  
Limit Of Detection ◽  
Sol Gel ◽  
Zno Nanorods ◽  
High Sensitivity ◽  
High Density ◽  
Glucose Detection ◽  
Zno Nanostructure ◽  
Growth Method ◽  
Gel Technique

Abstract:Glucose sensor based on ITO/ZnO NRs/GOx/nafion is fabricated and tested under different glucose concentrations. Hydrothermal growth method along with sol-gel technique is used to grow high quality ZnO nanorods that have well-alignment and high density with an acceptable aspect ratio. The as-grown of ZnO nanorods are used to fabricate a working electrode that can be used for glucose detection in blood after a modification process with GOx and nafion membrane. Annealing at 110 °C helped in improves the crystallinity of the seed layer and as a result, a high density and well alignment as-grown ZnO nanorods were obtained. High sensitivity and short response time were obtained from the fabricated device with an acceptable lower limit of detection.

Fabrication of an Electrochemical Sensor for Glucose Detection using ZnO Nanorods

MRS Advances ◽  
2016 ◽  
Vol 1 (13) ◽  
pp. 861-867 ◽  
Author(s):  
Sanghamitra Mandal ◽  
Mohammed Marie ◽  
Omar Manasreh
Keyword(s):  
Response Time ◽  
Glass Substrate ◽  
Glucose Sensor ◽  
Limit Of Detection ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Phosphate Buffer Solution ◽  
Buffer Solution ◽  
Coated Glass Substrate ◽  
Coated Glass

ABSTRACTAn electrochemical glucose sensor based on zinc oxide (ZnO) nanorods is fabricated, characterized and tested. The ZnO nanorods are synthesized on indium titanium oxide (ITO) coated glass substrate, using the hydrothermal sol-gel technique. The working principle of the sensor under investigation is based on the electrochemical reaction taking place between cathode and anode, in the presence of an electrolyte. A platinum plate, used as the cathode and Nafion/Glucose Oxidase/ZnO nanorods/ITO-coated glass substrate used as anode, is immersed in pH 7.0 phosphate buffer solution electrolyte to test for the presence of glucose. Several amperometric tests are performed on the fabricated sensor to determine the response time, sensitivity and limit of detection of the sensor. A fast response time less than 3 s with a high sensitivity of 1.151 mA cm-2mM-1 and low limit of detection of 0.089 mM is reported. The glucose sensor is characterized using the cyclic voltammetry method in the range from -0.8 – 0.8 V with a voltage scan rate of 100 mV/s.

scholarly journals Solvothermal synthesis of Fe3O4 nanospheres for high-performance electrochemical non-enzymatic glucose sensor

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jiasheng Xu ◽  
Yuting Sun ◽  
Jie Zhang
Keyword(s):  
Active Sites ◽  
High Performance ◽  
Glucose Sensor ◽  
Limit Of Detection ◽  
Glucose Monitoring ◽  
High Sensitivity ◽  
Blood Glucose Monitoring ◽  
Glucose Detection ◽  
Uniform Size ◽  
Long Term Stability

Abstract Ferroferric oxide (Fe3O4) nanospheres have been synthesized via a facile solvothermal procedure to serve as an electrode material for high performance non-enzymatic glucose sensor. The as-synthesized Fe3O4 nanospheres with a uniform size from 16 to 18 nm, which can increase the reaction contact area and the active sites in the process of glucose detection. Benefiting from the particular nanoscale structure, the Fe3O4 nanospheres obviously enhanced the activity of electrocatalytic oxidation towards glucose. When the Fe3O4 nanospheres material was used for non-enzymatic glucose sensor, several electrochemical properties including the high sensitivity 6560 μA mM−1 cm−2 (0.1–1.1 mM), limit of detection 33 μM (S/N = 3) and good long-term stability were well demonstrated. Furthermore, Fe3O4 nanospheres electrode confirmed the excellent performance of selectivity in glucose detection with the interfering substances existed such as urea, citric acid, ascorbic acid, and NaCl. Due to the excellent electrocatalytic activity in alkaline solution, the Fe3O4 nanospheres material can be considered as a promising candidate in blood glucose monitoring.

scholarly journals Non-enzymatic sensor for determination of glucose based on PtNi nanoparticles decorated graphene

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Risheng Li ◽  
Xu Deng ◽  
Longfei Xia
Keyword(s):  
Limit Of Detection ◽  
High Sensitivity ◽  
Glucose Detection ◽  
Serum Samples ◽  
Time Curve ◽  
Current Time ◽  
Glass Carbon ◽  
Graphene Glass ◽  
Ptni Alloy

Abstract Diabetes has become a universal epidemic in recent years. Herein, the monitoring of glucose in blood is of importance in clinical applications. In this work, PtNi alloy nanoparticles homogeneously dispersed on graphene (PtNi alloy-graphene) was synthesized as a highly effective electrode material for glucose detection. Based on the modified PtNi alloy-graphene/glass carbon (PtNi alloy-graphene/GC) electrode, it is found that the PtNi alloy-graphene/GC electrode exhibited excellent electrocatalytic performance on glucose oxidation. Furthermore, the results from amperometric current–time curve show a good linear range of 0.5–15 mM with the limit of detection of 16 uM (S/N = 3) and a high sensitivity of 24.03 uAmM−1 cm−2. On account of the good selectivity and durability, the modified electrode was successfully applied on glucose detection in blood serum samples.

Co3O4 Nanoparticles as a Noninvasive Electrochemical Sensor for Glucose Detection in Saliva

NANO ◽  
2020 ◽  
pp. 2150009
Author(s):  
Mei Wang ◽  
Fang Liu ◽  
Zhifeng Zhang ◽  
Erchao Meng ◽  
Feilong Gong ◽  
...  
Keyword(s):  
Glucose Sensor ◽  
Saliva Sample ◽  
High Sensitivity ◽  
Single Step ◽  
Uniform Structure ◽  
Glucose Detection ◽  
Co3o4 Nanoparticles ◽  
Glucose Levels ◽  
Maximal Sensitivity ◽  
Sensitivity And Selectivity

A new noninvasive glucose sensor is developed based on Co3O4 particles (Co3O4 NPs), which are synthesized by a single-step hydrothermal method with uniform structure and size. The electrochemical measurements reveal that the device exhibits outstanding performance for glucose detection, achieving a maximal sensitivity of 2495.79[Formula: see text][Formula: see text]A mM[Formula: see text] cm[Formula: see text] with a high [Formula: see text] of 0.99575, a ultra-low detection limit of 9.3[Formula: see text]nM with a signal-to-noise of 3 and linear range up to 3[Formula: see text]mM. The noninvasive glucose sensor can respond swiftly and selectively due to the high electrocatalytic activity of Co3O4 NPs. The sensor also shows its high sensitivity and selectivity in detecting glucose levels in human blood serum and saliva sample, confirming the application potential of Co3O4 NPs in noninvasive detection of glucose.

Highly Sensitive Picric Acid Chemical Sensor Based on Samarium (Sm) Doped ZnO Nanorods

2019 ◽  
Vol 19 (6) ◽  
pp. 3637-3642 ◽  
Author(s):  
Yas Al-Hadeethi ◽  
Ahmad Umar ◽  
Kulvinder Singh ◽  
Ahmed A Ibrahim ◽  
Saleh. H Al-Heniti ◽  
...  
Keyword(s):  
Large Scale ◽  
Chemical Sensor ◽  
Limit Of Detection ◽  
Picric Acid ◽  
Zno Nanorods ◽  
Hydrothermal Process ◽  
High Sensitivity ◽  
Highly Sensitive ◽  
Doped Zno ◽  
Facile Hydrothermal Process

Herein, we report the synthesis, characterization and picric acid chemical sensing application of samarium (Sm) doped ZnO nanorods. The Sm-doped ZnO nanorods were synthesized by facile hydrothermal process and characterized using various analytical methods which confirmed the large-scale synthesis and wurtzite hexagonal crystal structure for the synthesized nanorods. The doping of Sm ions in the lattices of the synthesized nanorods was evaluated by the energy dispersive X-ray spectroscopy (EDS). The synthesized Sm-doped ZnO nanorods were used as potential scaffold to fabricate high sensitive and reproducible picric acid chemical sensor based on I–V technique. The fabricated picric acid chemical sensor based on Sm-doped ZnO nanorods exhibited a high sensitivity of 213.9 mA mM−1 cm−2 with the limit of detection of ∼0.228 mM and correlation coefficient of R═0.9889. The obtained results revealed that the facile grown Sm-doped ZnO nanorods can efficiently be used to fabricate high sensitive and reproducible chemical sensors.

scholarly journals Nanostructured copper selenide as an ultrasensitive and selective non-enzymatic glucose sensor

2021 ◽  
Author(s):  
Siddesh Umapathi ◽  
Harish Singh ◽  
Jahangir Masud ◽  
Manashi Nath
Keyword(s):  
Detection Limit ◽  
High Efficiency ◽  
Glucose Sensor ◽  
High Sensitivity ◽  
Copper Selenide ◽  
Glucose Detection ◽  
Applied Potential ◽  
Detection Range ◽  
Low Detection Limit ◽  
Linear Detection

CuSe nanostructures exhibit high-efficiency for glucose detection with high sensitivity (19.419 mA mM−1 cm−2) and selectivity at low applied potential (0.15 V vs. Ag|AgCl), low detection limit (0.196 μM) and linear detection range (100 nM to 40 μM).

Morphology Controlled Synthesis of ZnO Nanorods for Glucose Enzymatic Biosensor

2019 ◽  
Vol 290 ◽  
pp. 280-285
Author(s):  
Ridhuan Nur Syafinaz ◽  
Abdul Razak Khairunisak ◽  
Zainovia Lockman
Keyword(s):  
Seed Layer ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Hydrothermal Process ◽  
Process Condition ◽  
Glucose Biosensor ◽  
Electrochemical Analysis ◽  
Zinc Oxide Nanorods ◽  
Glucose Detection ◽  
Electron Conduction

The use of zinc oxide nanorods is a promising option to increase the specific area for efficient glucose oxidase immobilization which further enhance the signal performance of glucose detection. In this work ZnO nanorods were prepared via hydrothermal process on sol-gel ZnO seed layer. The effects of different temperature of annealed seed layer on the morphology and properties of grow ZnO nanorods were investigated. The ZnO seed layers were annealed at various temperatures ranging from 300 to 600 °C for 2 h. The study demonstrated that the process condition of ZnO seed layer had a strong influence on the morphology and crystallinity of ZnO nanorods grow. X-ray diffraction analysis and scanning electronic microscopy were employed to characterize the crystal structure and morphology of the prepared ZnO seed layer and grow ZnO nanorods. The performance of different aspect ratio of ZnO nanorods on glucose detection were measured by using electrochemical analysis. With optimized ZnO nanorods, the glucose biosensor exhibited an enhanced in signal performance with a high sensitivity of 11.36 μA mM-1 cm-2 in the range of 0.05-1 mM. Such high performance was due to more immobilization on the well-aligned ZnO nanorods array and direct electron conduction between the nanorods and the electrodes

Ternary NiCoP nanosheet array on a Ti mesh: a high-performance electrochemical sensor for glucose detection

2016 ◽  
Vol 52 (100) ◽  
pp. 14438-14441 ◽  
Author(s):  
Zao Wang ◽  
Xiaoqin Cao ◽  
Danni Liu ◽  
Shuai Hao ◽  
Gu Du ◽  
...  
Keyword(s):  
High Performance ◽  
Glucose Sensor ◽  
Active Catalyst ◽  
High Sensitivity ◽  
Alkaline Media ◽  
Glucose Detection ◽  
Nanosheet Array ◽  
Electro Oxidation ◽  
Ti Mesh ◽  
Catalyst Electrode

NiCoP nanosheet array acts as a high-active catalyst electrode for glucose electro-oxidation in alkaline media. As a non-enzyme electrochemical glucose sensor, it shows a low detection limit of 0.13 μM (S/N = 3) and a high sensitivity of 14 586 μA mM−1 cm−2.

Effect of heat and time-period on the growth of ZnO nanorods by sol–gel technique

Optik ◽  
2012 ◽  
Vol 123 (15) ◽  
pp. 1340-1342 ◽  
Author(s):  
Neha Singh ◽  
Padmini Pandey ◽  
Fozia Z. Haque
Keyword(s):  
Sol Gel ◽  
Zno Nanorods ◽  
Time Period ◽  
Gel Technique

scholarly journals High-performance non-enzymatic glucose detection: using a conductive Ni-MOF as an electrocatalyst

2020 ◽  
Vol 8 (25) ◽  
pp. 5411-5415 ◽  
Author(s):  
Yanxia Qiao ◽  
Qian Liu ◽  
Siyu Lu ◽  
Guang Chen ◽  
Shuyan Gao ◽  
...  
Keyword(s):  
Detection Limit ◽  
Response Time ◽  
Blood Serum ◽  
High Performance ◽  
Glucose Sensor ◽  
High Sensitivity ◽  
Fast Response ◽  
Glucose Detection ◽  
Serum Samples ◽  
Fast Response Time

A glucose sensor based on a conductive Ni-MOF as an electrocatalyst exhibits a fast response time, low detection limit, and high sensitivity, and it can also be applied for the detection of glucose in blood serum samples.

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