A comprehensive review on carbon dots and graphene quantum dots based fluorescent sensor for biothiols

2020 ◽  
Vol 157 ◽  
pp. 105011 ◽  
Author(s):  
Zamir G. Khan ◽  
Pravin O. Patil
Keyword(s):  
Quantum Dots ◽  
Carbon Dots ◽  
Fluorescent Sensor ◽  
Graphene Quantum Dots ◽  
Comprehensive Review

A green synthetic route for the surface-passivation of carbon dots as an effective multifunctional fluorescent sensor for the recognition and detection of toxic metal ions from aqueous solution

2019 ◽  
Vol 11 (4) ◽  
pp. 490-506 ◽  
Author(s):  
K. Radhakrishnan ◽  
P. Panneerselvam ◽  
M. Marieeswaran
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Carbon Dots ◽  
Surface Passivation ◽  
Fluorescent Sensor ◽  
Toxic Metal ◽  
Carbon Quantum Dots ◽  
Synthetic Route ◽  
One Pot ◽  
Hydrothermal Methods

In this work, a green synthetic route was used to create a number of surface passivated fluorescent carbon quantum dots, which are explored as promising sensing probes, via facile one-pot hydrothermal methods.

Nanomolar Level Detection of Metal Ions by Improving the Monodispersity and Stability of Nitrogen-Doped Graphene Quantum Dots

2021 ◽  
Author(s):  
Neeraj Sohal ◽  
Simran Kaur Bhatia ◽  
Soumen Basu ◽  
Banibrata Maity
Keyword(s):  
Quantum Dots ◽  
Metal Ions ◽  
Fluorescent Sensor ◽  
Graphene Quantum Dots ◽  
Intrinsic Properties ◽  
Heteroatom Doping ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Heteroatom doping of graphene quantum dots (GQDs) leads to modify their intrinsic properties and used as a fluorescent sensor for the metal ions sensing. Here, Nitrogen-doped GQDs (N-GQDs) was synthesized...

scholarly journals Biosensors for the Detection of Bacterial and Viral Clinical Pathogens

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6926
Author(s):  
Luis Castillo-Henríquez ◽  
Mariana Brenes-Acuña ◽  
Arianna Castro-Rojas ◽  
Rolando Cordero-Salmerón ◽  
Mary Lopretti-Correa ◽  
...  
Keyword(s):  
Quantum Dots ◽  
New Technologies ◽  
Point Of Care ◽  
Graphene Quantum Dots ◽  
Electrospun Nanofibers ◽  
Comprehensive Review ◽  
Measurement Devices ◽  
Clinical Pathogens ◽  
And Performance ◽  
The One

Biosensors are measurement devices that can sense several biomolecules, and are widely used for the detection of relevant clinical pathogens such as bacteria and viruses, showing outstanding results. Because of the latent existing risk of facing another pandemic like the one we are living through due to COVID-19, researchers are constantly looking forward to developing new technologies for diagnosis and treatment of infections caused by different bacteria and viruses. Regarding that, nanotechnology has improved biosensors’ design and performance through the development of materials and nanoparticles that enhance their affinity, selectivity, and efficacy in detecting these pathogens, such as employing nanoparticles, graphene quantum dots, and electrospun nanofibers. Therefore, this work aims to present a comprehensive review that exposes how biosensors work in terms of bacterial and viral detection, and the nanotechnological features that are contributing to achieving a faster yet still efficient COVID-19 diagnosis at the point-of-care.

scholarly journals Facile synthesis of preformed mixed nano-carbon structure from low rank coal

2018 ◽  
Vol 36 (1) ◽  
pp. 14-20 ◽  
Author(s):  
B. Manoj ◽  
Ashlin M. Raj ◽  
George Thomas Chirayil
Keyword(s):  
Quantum Dots ◽  
Carbon Dots ◽  
Bituminous Coal ◽  
Graphene Quantum Dots ◽  
Energy Resource ◽  
Low Rank ◽  
Tem Analysis ◽  
Graphene Layers ◽  
Simple Chemical ◽  
Nano Carbon

Abstract Coal is a natural energy resource which is mainly used for energy production via combustion. Coal has nanocrystals embedded in it, formed during the coalification process, and is an ideal precursor for nano-carbon dots and diamonds. Herein, we report a facile top-down method to synthesise nanodots and diamonds of the size of 5 nm to 10 nm from three different types of coal by simple chemical leaching. TEM analysis revealed the formation of a mixture of carbon dots, graphene layers, and quantum dots in bituminous coal and sub-bituminous coal. Raman analysis confirmed the existence of synthesized nanodiamond and nano-carbon mixed phase with defects associated with it. It is concluded that graphene quantum dots, nanodiamonds, graphene sheets and carbon dots present in coal can be extracted by simple chemical treatment. These structures can be tuned to photoluminescent material for various optoelectronic applications or energy harvesting devices like super capacitors.

Excitation dependence and independence of photoluminescence in carbon dots and graphene quantum dots: insights into the mechanism of emission

Nanoscale ◽  
2021 ◽  
Author(s):  
Abu Bakar Siddique ◽  
Syed Minhaz Hossain ◽  
Ashit Kumar Pramanick ◽  
Mallar Ray
Keyword(s):  
Quantum Dots ◽  
Carbon Dots ◽  
Carbon Nanostructures ◽  
Graphene Quantum Dots ◽  
Emission Characteristics ◽  
Emission Mechanism ◽  
Insight Into

A pattern in excitation dependent and independent emission characteristics provides important insight into the emission mechanism from 0D carbon nanostructures.  

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