Tuning the electrical conductivity of amorphous carbon/reduced graphene oxide wrapped-Co3O4 ternary nanofibers for highly sensitive chemical sensors

2019 ◽  
Vol 7 (48) ◽  
pp. 27522-27534 ◽  
Author(s):  
Qiuxia Feng ◽  
Yamei Zeng ◽  
Pengcheng Xu ◽  
Shiwei Lin ◽  
Chao Feng ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Amorphous Carbon ◽  
Chemical Sensors ◽  
Electrospinning Process ◽  
Thermal Etching ◽  
Reduced Graphene ◽  
Highly Sensitive ◽  
First Time

The electrical conductivity of amorphous carbon/reduced graphene oxide(rGO)-wrapped Co3O4 nanofibers prepared by the electrospinning process is for the first time finely tuned creatively by the thermal-etching process in a controlled O2 environment.

Development of new highly sensitive serotonin sensor based on green synthesized silver nanoparticles decorated reduced graphene oxide

2021 ◽  
Author(s):  
Chérif DRIDI ◽  
Zina Fredj ◽  
Maroua Moslah
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Cost Effective ◽  
Reduced Graphene ◽  
Highly Sensitive ◽  
First Time ◽  
Green Synthesized Silver Nanoparticles

Electrochemical detectionof serotonin (5-hydroxytryptamine 5-HT) is proposed for the first time using a cost effective and eco-friendly nanocomposite of AgNPs and rGO which is synthesized through in situ green reduction...

scholarly journals Electrosynthesis of electrochemically reduced graphene oxide/polyaniline nanowire/silver nanoflower nanocomposite for development of a highly sensitive electrochemical DNA sensor

RSC Advances ◽  
2021 ◽  
Vol 11 (32) ◽  
pp. 19470-19481
Author(s):  
Luyen Thi Tran ◽  
Hoang Vinh Tran ◽  
Hue Thi Minh Dang ◽  
Anh Van Nguyen ◽  
Thuy Hong Tran ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Nanostructured Material ◽  
Dna Sensor ◽  
Electrochemical Dna Sensor ◽  
Reduced Graphene ◽  
Highly Sensitive ◽  
Electrochemically Reduced Graphene Oxide ◽  
First Time

A novel nanostructured material based on ERGO/PANi NWs/AgNFs was electrosynthesized on a Pt microelectrode and was used for the first time to develop an electrochemical DNA sensor.

Electrochemical behavior of isofraxidin at an electrodeposition reduced graphene oxide electrode and its analytical application

2016 ◽  
Vol 8 (7) ◽  
pp. 1473-1482 ◽  
Author(s):  
Junjun Wu ◽  
Lu Wang ◽  
Zhengkun Xie ◽  
Lina Zou ◽  
Baoxian Ye
Keyword(s):  
Graphene Oxide ◽  
Reaction Mechanism ◽  
Reduced Graphene Oxide ◽  
Electrochemical Behavior ◽  
Analytical Application ◽  
Voltammetric Sensor ◽  
Oxide Electrode ◽  
Reduced Graphene ◽  
Highly Sensitive ◽  
First Time

A highly sensitive voltammetric sensor ERGO/GCE was constructed and used for sensitive detection of isofraxidin. Then the electrochemical behavior of isofraxidin was carefully investigated for the first time and a possible reaction mechanism was proposed.

scholarly journals Graphene Oxide: A Smart (Starting) Material for Natural Methylxanthines Adsorption and Detection

Molecules ◽  
2019 ◽  
Vol 24 (23) ◽  
pp. 4247 ◽  
Author(s):  
Rita Petrucci ◽  
Isabella Chiarotto ◽  
Leonardo Mattiello ◽  
Daniele Passeri ◽  
Marco Rossi ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Nucleic Acids ◽  
Reduced Graphene Oxide ◽  
Electrochemical Sensors ◽  
Enzymatic Digestion ◽  
Biologically Active ◽  
Polar Solvents ◽  
Dna And Rna ◽  
Reduced Graphene

Natural methylxanthines, caffeine, theophylline and theobromine, are widespread biologically active alkaloids in human nutrition, found mainly in beverages (coffee, tea, cocoa, energy drinks, etc.). Their detection is thus of extreme importance, and many studies are devoted to this topic. During the last decade, graphene oxide (GO) and reduced graphene oxide (RGO) gained popularity as constituents of sensors (chemical, electrochemical and biosensors) for methylxanthines. The main advantages of GO and RGO with respect to graphene are the easiness and cheapness of synthesis, the notable higher solubility in polar solvents (water, among others), and the higher reactivity towards these targets (mainly due to – interactions); one of the main disadvantages is the lower electrical conductivity, especially when using them in electrochemical sensors. Nonetheless, their use in sensors is becoming more and more common, with the obtainment of very good results in terms of selectivity and sensitivity (up to 5.4 × 10−10 mol L−1 and 1.8 × 10−9 mol L−1 for caffeine and theophylline, respectively). Moreover, the ability of GO to protect DNA and RNA from enzymatic digestion renders it one of the best candidates for biosensors based on these nucleic acids. This is an up-to-date review of the use of GO and RGO in sensors.

Chemically reduced graphene oxide-coated knitted fabric imparted conductivity and outstanding hydrophobicity

2021 ◽  
pp. 004051752199547
Author(s):  
Min Hou ◽  
Xinghua Hong ◽  
Yanjun Tang ◽  
Zimin Jin ◽  
Chengyan Zhu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Chemical Reduction ◽  
Knitted Fabric ◽  
Mesh Structure ◽  
Reduced Graphene ◽  
Chemically Reduced Graphene Oxide ◽  
Modified Hummers Method

Functionalized knitted fabric, as a kind of flexible, wearable, and waterproof material capable of conductivity, sensitivity and outstanding hydrophobicity, is valuable for multi-field applications. Herein, the reduced graphene oxide (RGO)-coated knitted fabric (polyester/spandex blended) is prepared, which involves the use of graphite oxide (GO) by modified Hummers method and in-situ chemical reduction with hydrazine hydrate. The treated fabric exhibits a high electrical conductivity (202.09 S/cm) and an outstanding hydrophobicity (140°). The outstanding hydrophobicity is associated with the morphology of the fabric and fiber with reference to pseudo-infiltration. These properties can withstand repeated bending and washing without serious deterioration, maintaining good electrical conductivity (35.70 S/cm) and contact angle (119.39°) after eight standard washing cycles. The material, which has RGO architecture and continuous loop mesh structure, can find wide use in smart garment applications.

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