Carbon quantum dots for optical sensor applications: A review

2021 ◽  
Vol 139 ◽  
pp. 106928
Author(s):  
Nur Afifah Ahmad Nazri ◽  
Nur Hidayah Azeman ◽  
Yunhan Luo ◽  
Ahmad Ashrif A Bakar
Keyword(s):  
Quantum Dots ◽  
Optical Sensor ◽  
Carbon Quantum Dots ◽  
Sensor Applications

A Novel Bioinspired Carbon Quantum Dots based Optical Sensor for Ciprofloxacin Detection

2021 ◽  
pp. 131090
Author(s):  
Navneet Chaudhry ◽  
Damini Verma ◽  
Jai Gopal Sharma ◽  
Pratima R. Solanki
Keyword(s):  
Quantum Dots ◽  
Optical Sensor ◽  
Carbon Quantum Dots

scholarly journals Economical, Green Synthesis of Fluorescent Carbon Quantum Dots from Lac Extract

2020 ◽  
Vol 5 (3) ◽  
pp. 213-217 ◽  
Keyword(s):  
Quantum Dots ◽  
Green Synthesis ◽  
Water Solubility ◽  
Low Cost ◽  
Hydrothermal Process ◽  
Synthesis Method ◽  
Photovoltaic Cell ◽  
Carbon Quantum Dots ◽  
Sensor Applications ◽  
Fluorescent Carbon

Fluorescent carbon quantum dots (FCDs) have attracted tremendous interest because of their advantageous characteristics of cost effectiveness and fluorescent nature. In this study, we developed a simple, economical and effective method for the green synthesis of fluorescent carbon quantum dots (FCDs) from Lac of Butea monosperma host tree, a renewable and sustainable resource. The synthesis method involves the low cost hydrothermal process using the Lac extract as a carbon source. The as-synthesized FCDs were characterized by Xray diffraction (XRD), Transmission electron microscopy (TEM) and Spectrofluorophotometer. The synthesized FCDs possess stable good water solubility as well as high quantum yield. The results suggest that the proposed FCDs could be utilized for photovoltaic cell, bio imaging, drug delivery and bio-sensor applications.

LUMINESCENT DETERMINATION OF SUGAR IN NATURAL HONEY

2020 ◽  
Vol 0 (4) ◽  
pp. 29-32
Author(s):  
B.M. GAREEV ◽  
◽  
A.M. ABDRAKHMANOV ◽  
G.L. SHARIPOV ◽  
◽  
...  
Keyword(s):  
Quantum Dots ◽  
Laboratory Test ◽  
Aqueous Solutions ◽  
Analytical Method ◽  
Sugar Content ◽  
Carbon Quantum Dots ◽  
Photoluminescence Intensity ◽  
Sucrose Content ◽  
Natural Honey

The photoluminescence of carbon quantum dots synthesized from natural honey and mixtures of honey and sugar has been studied. An increase in the sugar content leads to a decrease in the photoluminescence intensity without changing the shape of the luminescence spectrum of these quantum dots aqueous solutions, which is associated with a decrease in the yield of their synthesis in the sugar presence. The discovered effect can be used to detect sugar in honey. When examining five different market samples of flower honey using this method, two of them showed a significant decrease in the photoluminescence intensity. A laboratory test for compliance with GOST 19792-2017 Standard requirements established an excess of the sucrose content in these samples. Luminescent determination of sugar in honey does not require complicated equipment and can be used to develop a new analytical method for determining the sugar content in counterfeit natural honey.

Enhanced reduction of p-nitrophenol by zerovalent iron modified with carbon quantum dots

2021 ◽  
Vol 285 ◽  
pp. 119829
Author(s):  
Peng Fan ◽  
Xuanjun Zhang ◽  
Huanhuan Deng ◽  
Xiaohong Guan
Keyword(s):  
Quantum Dots ◽  
Carbon Quantum Dots ◽  
Zerovalent Iron
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