scholarly journals Applications of Graphene-Based Materials in Sensors

Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3196
Author(s):  
Miguel Hernaez
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensors ◽  
Graphene Quantum Dots ◽  
Special Issue ◽  
Mass Sensors ◽  
Screen Printed Electrodes ◽  
Reduced Graphene ◽  
Screen Printed

This Special Issue compiles a set of innovative developments on the use of graphene-based materials in the fabrication of sensors. In particular, these contributions report original studies on a wide variety of sensors, such as gas sensors for NO2 or NH3 detection, antibody biosensors or mass sensors. All these devices have one point in common: they have been built using graphene-based materials like graphene, graphene oxide, reduced graphene oxide, inkject printing graphene, graphene-based composite sponges, graphene screen-printed electrodes or graphene quantum dots.

scholarly journals Composites of Graphene Quantum Dots and Reduced Graphene Oxide as Catalysts for Nitroarene Reduction

ACS Omega ◽  
2017 ◽  
Vol 2 (10) ◽  
pp. 7293-7298 ◽  
Author(s):  
Jiali Zhang ◽  
Fangwei Zhang ◽  
Yaoyao Yang ◽  
Shouwu Guo ◽  
Jingyan Zhang
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Graphene Quantum Dots ◽  
Reduced Graphene ◽  
Nitroarene Reduction

Facile and simultaneous synthesis of graphene quantum dots and reduced graphene oxide for bio-imaging and supercapacitor applications

2016 ◽  
Vol 40 (11) ◽  
pp. 9111-9124 ◽  
Author(s):  
A. Muthurasu ◽  
P. Dhandapani ◽  
V. Ganesh
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Graphene Quantum Dots ◽  
Reduced Graphene ◽  
Bio Imaging ◽  
Simultaneous Synthesis ◽  
Supercapacitor Applications

A simple and facile method for the simultaneous preparation of graphene quantum dots (GQDs) having different emission colours, viz., yellow, green and blue, and reduced graphene oxide (RGO) utilized respectively for bio-imaging and supercapacitor applications is demonstrated.

Potentiometric Taste Sensing Using Reduced Graphene Oxide Screen Printed Electrodes

2020 ◽  
Vol 18 (12) ◽  
pp. 881-888
Author(s):  
Anil B. Patil ◽  
Umesh. J. Tupe ◽  
Vikas V. Deshmane ◽  
Arun V. Patil
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Principal Component ◽  
Experimental Results ◽  
Statistical Tool ◽  
Sensing Applications ◽  
Screen Printed Electrodes ◽  
Reduced Graphene ◽  
Pharmaceutical Industries ◽  
Screen Printed

This paper reports the development of simple and economical reduced graphene oxide (rGO) based screen-printed electrodes (SPE) for five basic taste sensing applications. Twenty different test solutions for the five tastes of salty, sour, sweet, umami, and bitter at 1 ppm, 10 ppm, 100 ppm, 1000 ppm concentration levels were tested with the fabricated SPEs. From experimental results, electrical signals generated between the electrode and test solution interface were measured using the potentiometric method. Satisfactory potentiometric responses of SPEs to different ppm concentrations for each sample were used to analyze the sample data. Histogram using the statistical tool was used to analyze the changes in the conductivity response. A multivariate Principal Component Analysis (PCA) statistical tool correlated using loading plots between variables and factors of all the five basic tastes. The plot showed the interrelation between variables and test samples. The obtained experimental results from these rGO based SPEs make them suitable for their use in taste sensing applications such as for any taste disorder disability, food-producing industry, pharmaceutical industries, etc.

scholarly journals Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots

ACS Omega ◽  
2020 ◽  
Vol 5 (34) ◽  
pp. 21345-21354
Author(s):  
Esraa Hamdy ◽  
Laila Saad ◽  
Fuad Abulfotuh ◽  
Moataz Soliman ◽  
Shaker Ebrahim
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Thermal Properties ◽  
Reduced Graphene Oxide ◽  
Graphene Quantum Dots ◽  
Reduced Graphene

Alcohol dehydration performance of pervaporation composite membranes with reduced graphene oxide and graphene quantum dots homostructured filler

Carbon ◽  
2020 ◽  
Vol 162 ◽  
pp. 318-327 ◽  
Author(s):  
Rumwald Leo G. Lecaros ◽  
Ma. Elizabeth Bismonte ◽  
Bonifacio T. Doma ◽  
Wei-Song Hung ◽  
Chien-Chieh Hu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Graphene Quantum Dots ◽  
Composite Membranes ◽  
Alcohol Dehydration ◽  
Reduced Graphene

The Role of Reduced Graphene Oxide Concentration as Ablated Material on Optical Properties of Graphene Quantum Dots

2019 ◽  
Vol 948 ◽  
pp. 267-273 ◽  
Author(s):  
Fiqhri Heda Murdaka ◽  
Ahmad Kusumaatmaja ◽  
Isnaeni ◽  
Iman Santoso
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Graphene Oxide ◽  
Band Gap ◽  
Reduced Graphene Oxide ◽  
Optical Band Gap ◽  
Graphene Quantum Dots ◽  
Absorption Peak ◽  
Oxygen Defect ◽  
Reduced Graphene

We report the synthesize of Graphene Quantum Dots (GQDs) using ablation method with reduced Graphene Oxide (rGO) solution as a starting material. We have varied the concentration of rGO as following: 0.5, 2, 5 mg/ml and then have ablated them using 800 nm Ti-Sapphire femtosecond laser to obtain GQDs. From the UV-Vis data, we observed that the more concentration of rGO is being ablated, the more secondary absorption peak at 255.1 nm appeared. This secondary absorption peak is a characteristic of n-π* bonding due to the presence of oxygen defect which occurs as a result of the interaction between the laser and the water in rGO solution. We conclude that the population of oxigen defect in GQDs is increasing, following the increase of rGO concentration and could alter the optical properties of GQD. On the other hand, using Tauc’s plot, we confirm that the increase of rGO concentration as the ablated material does not alter GQDs optical band gap. However, it will slightly reduce both, direct and indirect Oxygen defect related optical band gap.

scholarly journals An ultrafast quantum thermometer from graphene quantum dots

2019 ◽  
Vol 1 (5) ◽  
pp. 1772-1783 ◽  
Author(s):  
Poonam Sehrawat ◽  
Abid Abid ◽  
S. S. Islam
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Temperature Sensor ◽  
Graphene Quantum Dots ◽  
Reduced Graphene

We report an ultra-sensitive temperature sensor derived from graphene quantum dots (GQDs) embedded in a self-standing reduced graphene oxide (RGO) film.

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