scholarly journals Waste eggshell membrane-templated synthesis of functional Cu2+–Cu+/biochar for an ultrasensitive electrochemical enzyme-free glucose sensor

RSC Advances ◽  
2021 ◽  
Vol 11 (31) ◽  
pp. 18994-18999
Author(s):  
Linzhi Li ◽  
Tianzeng Huang ◽  
Saijun He ◽  
Xing Liu ◽  
Qi Chen ◽  
...  
Keyword(s):  
Glucose Sensor ◽  
Glucose Sensing ◽  
Fabrication Process ◽  
Eggshell Membrane ◽  
Templated Synthesis ◽  
Free Glucose

The fabrication process of the nonenzyme glucose sensing based Cu2+–Cu+/biochar.

scholarly journals A Nonenzymatic Glucose Sensor Platform Based on Specific Recognition and Conductive Polymer-Decorated CuCo2O4 Carbon Nanofibers

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2874 ◽  
Author(s):  
Yongling Ding ◽  
Huadong Sun ◽  
Chunrong Ren ◽  
Mingchen Zhang ◽  
Kangning Sun
Keyword(s):  
Carbon Nanofibers ◽  
Boronic Acid ◽  
Composite Nanofibers ◽  
Glucose Sensor ◽  
Synergistic Effects ◽  
Conductive Polymer ◽  
Modified Electrodes ◽  
Glucose Sensing ◽  
Nonenzymatic Glucose Sensor ◽  
Free Glucose

CuCo2O4 decoration carbon nanofibers (CNFs) as an enzyme-free glucose sensor were fabricated via electrospinning technology and carbonization treatment. The CNFs with advantages of abundant nitrogen amounts, porosity, large surface area, and superior electrical conductivity were used as an ideal matrix for CuCo2O4 decoration. The resultant CuCo2O4–CNF hybrids possessed favorable properties of unique three-dimensional architecture and good crystallinity, accompanied by the CuCo2O4 nanoparticles uniformly growing on the CNF skeleton. To further enhance the selective molecular recognition capacity of the developed sensor, a conductive film was synthesized through the electropolymerization of thiophene and thiophene-3-boronic acid (TBA). Based on the synergistic effects of the performances of CNFs, CuCo2O4 nanoparticles, and boronic acid-decorated polythiophene layer, the obtained poly(thiophene-3-boronic acid) (PTBA)/CuCo2O4–CNF-modified electrodes (PTBA/CuCo2O4–CNFs/glassy carbon electrode (GCE)) displayed prominent electrocatalytic activity toward electro-oxidation of glucose. The fabricated sensor presented an outstanding performance in the two linear ranges of 0.01–0.5 mM and 0.5–1.5 mM, with high selectivity of 2932 and 708 μA·mM−1·cm−2, respectively. The composite nanofibers also possessed good stability, repeatability, and excellent anti-interference selectivity toward the common interferences. All these results demonstrate that the proposed composite nanofibers hold great potential in the application of constructing an enzyme-free glucose sensing platform.

Mixed Ni–Cu-oxide nanowire array on conductive substrate and its application as enzyme-free glucose sensor

2012 ◽  
Vol 4 (12) ◽  
pp. 4003 ◽  
Author(s):  
Ruimin Ding ◽  
Jinping Liu ◽  
Jian Jiang ◽  
JianHui Zhu ◽  
Xintang Huang
Keyword(s):  
Glucose Sensor ◽  
Nanowire Array ◽  
Conductive Substrate ◽  
Free Glucose

scholarly journals Two glucose sensing/signaling pathways stimulate glucose-induced inactivation of maltose permease in Saccharomyces.

1997 ◽  
Vol 8 (7) ◽  
pp. 1293-1304 ◽  
Author(s):  
H Jiang ◽  
I Medintz ◽  
C A Michels
Keyword(s):  
Signaling Pathways ◽  
Glucose Transport ◽  
Glucose Sensor ◽  
Constitutive Expression ◽  
Glucose Sensing ◽  
Regulation Of Transcription ◽  
Carbohydrate Utilization ◽  
Maltose Permease ◽  
Glucose Levels ◽  
Dependent Signal

Glucose is a global metabolic regulator in Saccharomyces. It controls the expression of many genes involved in carbohydrate utilization at the level of transcription, and it induces the inactivation of several enzymes by a posttranslational mechanism. SNF3, RGT2, GRR1 and RGT1 are known to be involved in glucose regulation of transcription. We tested the roles of these genes in glucose-induced inactivation of maltose permease. Our results suggest that at least two signaling pathways are used to monitor glucose levels. One pathway requires glucose sensor transcript and the second pathway is independent of glucose transport. Rgt2p, which along with Snf3p monitors extracellular glucose levels, appears to be the glucose sensor for the glucose-transport-independent pathway. Transmission of the Rgt2p-dependent signal requires Grr1p. RGT2 and GRR1 also play a role in regulating the expression of the HXT genes, which appear to be the upstream components of the glucose-transport-dependent pathway regulating maltose permease inactivation. RGT2-1, which was identified as a dominant mutation causing constitutive expression of several HXT genes, causes constitutive proteolysis of maltose permease, that is, in the absence of glucose. A model of these glucose sensing/signaling pathways is presented.

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 3D Modeling of Silver Doped ZrO2 Coupled Graphene-Based Mesoporous Silica Quaternary Nanocomposite for a Nonenzymatic Glucose Sensing Effects

Nanomaterials ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 193
Author(s):  
Kamrun Nahar Fatema ◽  
Chang-Sung Lim ◽  
Yin Liu ◽  
Kwang-Youn Cho ◽  
Chong-Hun Jung ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Mesoporous Silica ◽  
Photoelectron Spectroscopy ◽  
Glucose Sensor ◽  
Diffuse Reflectance Spectroscopy ◽  
Active Material ◽  
Glucose Sensing ◽  
X Ray ◽  
Transmission Electron

We described the novel nanocomposite of silver doped ZrO2 combined graphene-based mesoporous silica (ZrO2-Ag-G-SiO2,) in bases of low-cost and self-assembly strategy. Synthesized ZrO2-Ag-G-SiO2 were characterized through X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDX), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, Nitrogen adsorption-desorption isotherms, X-ray photoelectron spectroscopy (XPS), and Diffuse Reflectance Spectroscopy (DRS). The ZrO2-Ag-G-SiO2 as an enzyme-free glucose sensor active material toward coordinate electro-oxidation of glucose was considered through cyclic voltammetry in significant electrolytes, such as phosphate buffer (PBS) at pH 7.4 and commercial urine. Utilizing ZrO2-Ag-G-SiO2, glucose detecting may well be finished with effective electrocatalytic performance toward organically important concentrations with the current reaction of 9.0 × 10−3 mAcm−2 and 0.05 mmol/L at the lowest potential of +0.2 V, thus fulfilling the elemental prerequisites for glucose detecting within the urine. Likewise, the ZrO2-Ag-G-SiO2 electrode can be worked for glucose detecting within the interferometer substances (e.g., ascorbic corrosive, lactose, fructose, and starch) in urine at proper pH conditions. Our results highlight the potential usages for qualitative and quantitative electrochemical investigation of glucose through the ZrO2-Ag-G-SiO2 sensor for glucose detecting within the urine concentration.

Facile One-Pot Synthesis of Yolk-Shell Structured Ni Doped Mesoporous Silica and Its Application in Enzyme-Free Glucose Sensor

2018 ◽  
Vol 3 (22) ◽  
pp. 6029-6034 ◽  
Author(s):  
Nabanita Pal ◽  
Sangam Banerjee ◽  
Eunji Choi ◽  
Eun-Bum Cho
Keyword(s):  
Mesoporous Silica ◽  
Glucose Sensor ◽  
One Pot ◽  
One Pot Synthesis ◽  
Free Glucose
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