Highly Sensitive Enzyme-Less Glucose Biosensor Based on α-Fe2O3 Nanoparticles

2018 ◽  
Vol 10 (3) ◽  
pp. 429-434 ◽  
Author(s):  
Ahmad Umar ◽  
Kulvinder Singh ◽  
S. K. Mehta ◽  
H. Fouad ◽  
Othman Y. Alothman
Keyword(s):  
Glucose Sensor ◽  
Hydrothermal Process ◽  
High Sensitivity ◽  
Fast Response ◽  
Glucose Biosensor ◽  
High Reproducibility ◽  
Highly Sensitive ◽  
Rhombohedral Crystal ◽  
Coefficient Of Regression ◽  
Facile Hydrothermal Process

This paper reports the synthesis, characterization and fabrication of enzyme-less glucose sensor based on iron oxide (α-Fe2O3) nanoparticles synthesized by facile hydrothermal process. The synthesized nanoparticles were characterized by various techniques to understand the morphologies, composition and scattering properties. The morphological and structural studies confirmed the successful formation of α-Fe2O3 nanoparticles in large quantity which exhibiting well-crystallinity and rhombohedral crystal structures. The fabricated enzyme-less glucose sensor based on α-Fe2O3 nanoparticles revealed high sensitivity of 30.89 μA/mM cm2 with a fast response time (5 sec). The fabricated glucose sensor exhibited high reproducibility and its electrochemical response found to be linear over a wide concentration range of glucose from 1 to 10 mM with coefficient of regression (R) = 0.9981.

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 Highly Sensitive Non-Enzymatic Detection of Glucose at MWCNT-CuBTC Composite Electrode

2020 ◽  
Vol 10 (23) ◽  
pp. 8419
Author(s):  
Adriana Remes ◽  
Florica Manea ◽  
Sorina Motoc (m. Ilies) ◽  
Anamaria Baciu ◽  
Elisabeta I. Szerb ◽  
...  
Keyword(s):  
Composite Electrode ◽  
Glucose Sensor ◽  
Low Cost ◽  
Multiwall Carbon Nanotubes ◽  
Linear Sweep Voltammetry ◽  
High Sensitivity ◽  
Differential Pulse ◽  
Roll Mill ◽  
Highly Sensitive ◽  
Enzymatic Detection

A novel electrochemical glucose sensor was developed, based on a multiwall carbon nanotubes (MWCNTs)-copper-1,3,5-benzenetricarboxylic acid (CuBTC)-epoxy composite electrode, named MWCNT-CuBTC. The electrode nanocomposite was prepared by a two-roll mill procedure and characterized morphostructurally by scanning electron microscopy (SEM). The CuBTC formed defined crystals with a wide size distribution, which were well dispersed and embedded in the MWCNTs. Its electrical conductivity was determined by four-point probe contact (DC) conductivity measurements. The electroactive surface area, determined using cyclic voltammetry (CV), was found to be 6.9 times higher than the geometrical one. The results of the electrochemical measurements using CV, linear sweep voltammetry (LSV), differential pulse voltammetry (DPV), chronoamperometry (CA) and multiple pulse amperometry (MPA) showed that the MWCNT-CuBTC composite electrode displayed high electrocatalytic activity toward the oxidation of glucose and, as a consequence, very high sensitivity. The best sensitivity of 14,949 µAmM−1cm−1 was reached using MPA at the potential value of 0.6 V/SCE, which was much higher in comparison with other copper-based electrodes reported in the literature. The good analytical performance, low cost and simple preparation method make this novel electrode material promising for the development of an effective glucose sensor.

Cuprous Oxide Films with Hollow Cubic Cage Structure for Nonenzymatic Glucose Detection

NANO ◽  
2019 ◽  
Vol 14 (04) ◽  
pp. 1950045
Author(s):  
Fang Sun ◽  
Lehong Xing ◽  
Xihui Yang ◽  
Hailiang Huang ◽  
Lina Ning
Keyword(s):  
Electrode Materials ◽  
Glucose Sensor ◽  
High Sensitivity ◽  
Fast Response ◽  
Glucose Sensing ◽  
Glucose Sensors ◽  
Cage Structure ◽  
Active Materials ◽  
Nonenzymatic Glucose Sensor ◽  
Step Procedure

In this study, CuO films with hollow cubic cages were prepared by a facile two-step procedure consisting of electrodeposition synthesis and subsequent direct calcination. First, Cu2O nanocubes were fabricated on ITO substrate through a simple electrodeposition procedure. Then, Cu2O nanocubes were converted to CuO hollow cubic cages without obvious morphological change through direct calcination. The obtained CuO cubic cages serving as active materials illustrated a favorable performance for nonenzymatic glucose sensing with high sensitivity of [Formula: see text]A[Formula: see text]mM[Formula: see text][Formula: see text]cm[Formula: see text] at a low applied potential of 0.50[Formula: see text]V, fast-response time (less than 3[Formula: see text]s), low detection limit of 1.0[Formula: see text][Formula: see text]M and wide linear range up from 2.0[Formula: see text][Formula: see text]M to 1.0[Formula: see text]mM ([Formula: see text]). Moreover, the good selectivity of the CuO cubic cages-based nonenzymatic glucose sensor against electroactive compounds such as ascorbic acid, uric acid and dopamine were also demonstrated. These good features indicate that the as-prepared CuO cubic cages can be used as promising electrode materials, which have a great potential in the development of sensitive and selective nonenzymatic glucose sensors.

A highly sensitive glucose sensor based on a gold nanoparticles/polyaniline/multi-walled carbon nanotubes composite modified glassy carbon electrode

2018 ◽  
Vol 42 (14) ◽  
pp. 11944-11953 ◽  
Author(s):  
Xinping Zeng ◽  
Yazhou Zhang ◽  
Xiling Du ◽  
Yanfei Li ◽  
Wenwei Tang
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Glucose Sensor ◽  
High Sensitivity ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Highly Sensitive ◽  
Multi Walled Carbon Nanotubes ◽  
Application Potential ◽  
Walled Carbon Nanotubes

The PTFE/GOx/AuNPs/PANI/MWCNTs/GCE glucose sensor possesses wide linear range, low detection limit, high sensitivity, which can measure the glucose in human serum and holds application potential.

A comparative study of electrocatalytic oxidation of glucose on conductive Ni-MOF nanosheet arrays with different ligands

2020 ◽  
Vol 44 (41) ◽  
pp. 17849-17853
Author(s):  
Yanxia Qiao ◽  
Rui Zhang ◽  
Fangyuan He ◽  
Wenli Hu ◽  
Xiaowei Cao ◽  
...  
Keyword(s):  
Detection Limit ◽  
Comparative Study ◽  
Response Time ◽  
Electrocatalytic Oxidation ◽  
Glucose Sensor ◽  
High Sensitivity ◽  
Fast Response ◽  
Serum Samples ◽  
Nanosheet Arrays ◽  
Oxidation Of Glucose

A glucose sensor based on conductive Ni-MOF nanosheet arrays/CC exhibits a fast response time, a low detection limit, a high sensitivity, and it can also be applied for the detection of glucose in human serum samples.

Ultrahigh Sensitivity Micro-cliff Graphene Wearable Pressure Sensor Made by Instant Flash Light Exposure

Nanoscale ◽  
2021 ◽  
Author(s):  
Yachu Zhang ◽  
Han Lin ◽  
Fei Meng ◽  
Huai Liu ◽  
David Mesa ◽  
...  
Keyword(s):  
Health Monitoring ◽  
Pressure Sensor ◽  
Biomedical Applications ◽  
Light Exposure ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Fast Response ◽  
Highly Sensitive ◽  
Ultrahigh Sensitivity ◽  
Sensitive Pressure

Wearable and highly sensitive pressure sensors are of great importance for robotics, health monitoring and biomedical applications. Simultaneously achieving high sensitivity within a broad working range, fast response time (within...

Highly sensitive and fast-response hydrogen sensing of WO3 nanoparticles via palladium reined spillover effect

Nanoscale ◽  
2021 ◽  
Author(s):  
Zhengyou Zhu ◽  
Xiaxia Xing ◽  
Dongliang Feng ◽  
Zhenxu Li ◽  
Yingying Tian ◽  
...  
Keyword(s):  
Spillover Effect ◽  
High Sensitivity ◽  
Fast Response ◽  
Hydrogen Sensing ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity

Hydrogen sensing simultaneously endowed with fast response, high sensitivity and selectivity are highly desired in detecting hydrogen leakages such as in those hydrogen-driven vehicles and space rockets. Here, hydrogen sensing...

Preparation of Ni(OH)2 nanosheets on Ni foam via a direct precipitation method for a highly sensitive non-enzymatic glucose sensor

RSC Advances ◽  
2015 ◽  
Vol 5 (66) ◽  
pp. 53665-53670 ◽  
Author(s):  
Yudong Zhao ◽  
Gaochen Gu ◽  
Shengquan You ◽  
Renhua Ji ◽  
Hui Suo ◽  
...  
Keyword(s):  
Glucose Concentration ◽  
Glucose Sensor ◽  
High Sensitivity ◽  
Precipitation Method ◽  
Ni Foam ◽  
Direct Precipitation ◽  
Highly Sensitive ◽  
Direct Precipitation Method

Ni(OH)2 nanosheets on Ni foam was prepared by the direct precipitation method. This electrode shows high sensitivity with 1130 μA mM−1 cm−2 at the glucose concentration range of 2 μM to 40 μM and 1097 μA mM−1 cm−2 at the range of 0.1 mM to 2.5 mM.

Highly sensitive non-enzymatic electrochemical glucose sensor surpassing water oxidation interference

2021 ◽  
Author(s):  
Neha Thakur ◽  
Debaprasad Mandal ◽  
Tharamani Chikka Nagaiah
Keyword(s):  
Water Oxidation ◽  
Glucose Sensor ◽  
High Sensitivity ◽  
The Novel ◽  
Enzymatic Sensor ◽  
Highly Sensitive ◽  
Sensitive Determination

An electrochemical non-enzymatic sensor based on NiVP/Pi material was developed for the selective and sensitive determination of glucose. The novel sensor shows ultra-high sensitivity of 6.04 mA μM-1 cm-2 with...

Ni Hierarchical Structures Supported on Titania Nanowire Arrays as Efficient Nonenzymatic Glucose Sensor

2020 ◽  
Vol 20 (5) ◽  
pp. 3246-3251 ◽  
Author(s):  
Hai-Long Hu ◽  
Chuan He ◽  
Bao-Gang Guo ◽  
He-Yan Huang ◽  
Xing-Quan Zhang ◽  
...  
Keyword(s):  
Glucose Sensor ◽  
Low Cost ◽  
Hierarchical Structures ◽  
High Sensitivity ◽  
Fast Response ◽  
Nanowire Arrays ◽  
Nonenzymatic Glucose Sensor ◽  
Conductive Substrate ◽  
Nano Sensors ◽  
Oxidation Of Glucose

Developing new advanced nonenzymatic electrochemical nano-sensors for glucose detection has attracted intensive attraction. In this work, we designed a novel nanocomposite nonenzymatic glucose sensor by fabricating hierarchically nanostructured metal nickel on titania nanowire arrays, which was loaded on a transparent conductive substrate (i.e., fluorine-doped tin oxide, FTO) surface by mild hydrothermal method. Due to the large surface area of the hierarchically nanostructured Ni and fast electron transfer of the TiO2 nanowire arrays electrode, the nanocomposite electrode shows excellent electrochemical activity toward the oxidation of glucose. The electrode exhibits high sensitivity in detecting glucose concentration (1472 μA mM−1 cm−2) with a wide linear range from 2×10−4 M to 2×10−3 M, fast response time (within 5 s), and small detection limit (10 μM) (S/N = 3). The good analytical performance, low cost and simple preparation method make this novel electrode material promising for the development of effective glucose nonenzymatic glucose sensor.

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