Label-free approach for electrochemical ferritin sensing using biosurfactant stabilized tungsten disulfide quantum dots

2020 ◽  
Vol 151 ◽  
pp. 111979 ◽  
Author(s):  
Mayank Garg ◽  
Mary Chatterjee ◽  
Amit L. Sharma ◽  
Suman Singh
Keyword(s):  
Quantum Dots ◽  
Tungsten Disulfide ◽  
Label Free

scholarly journals Label-Free Electrochemical Aptasensor for Sensitive Detection of Malachite Green Based on Au Nanoparticle/Graphene Quantum Dots/Tungsten Disulfide Nanocomposites

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 229 ◽  
Author(s):  
Qianqian Wang ◽  
Xiaofei Qin ◽  
Liping Geng ◽  
Yan Wang
Keyword(s):  
Quantum Dots ◽  
Malachite Green ◽  
Au Nanoparticles ◽  
Graphene Quantum Dots ◽  
Tungsten Disulfide ◽  
Electrochemical Sensing ◽  
Au Nanoparticle ◽  
Label Free ◽  
Electrochemical Aptasensor ◽  
Fish Samples

A label-free electrochemical aptasensor was fabricated to sensitively determine malachite green (MG) based on Au nanoparticles/graphene quantum dots-tungsten disulfide nanosheet composite film modified glassy carbon electrode (AuNPs/GQDs-WS2/GCE). A facial strategy for the self-assembly of graphene quantum dots (GQDs) on tungsten disulfide nanosheets (WS2) was developed to fabricate 0D/2D nanocomposites. As-prepared GQDs-WS2 hybrids exhibited significantly enhanced electrocatalytic properties, and were first used as electroactive materials to construct electrochemical aptasensor. The AuNPs/GQDs-WS2/GCE was prepared through depositing Au nanoparticles on the surface of the GQDs-WS2 film, which acted as the electrochemical sensing matrix to covalently immobilize the aptamers of MG via the Au–S bond. In this label-free proposal, the aptasensor was applied to detect MG by monitoring voltammetric signal resulted from electrochemical oxidation of the MG captured by the aptamer. Under the optimized conditions, the aptasensor showed a wide linear range from 0.01 to 10 μM for MG detection with a low detection limit of 3.38 nM (S/N = 3). The method was applied to determination of MG in spiked fish samples and gave satisfactory results.

H2O2-sensitive quantum dots for the label-free detection of glucose

Talanta ◽  
2010 ◽  
Vol 82 (3) ◽  
pp. 997-1002 ◽  
Author(s):  
Mei Hu ◽  
Jing Tian ◽  
Hao-Ting Lu ◽  
Li-Xing Weng ◽  
Lian-Hui Wang
Keyword(s):  
Quantum Dots ◽  
Label Free ◽  
Label Free Detection

One-step hydrothermal synthesis of down/up-conversion luminescence F-doped carbon quantum dots for label-free detection of Fe3+

2019 ◽  
Vol 151 ◽  
pp. 104217 ◽  
Author(s):  
Dan Hong ◽  
Xiaoyan Deng ◽  
Jiaman Liang ◽  
Jiayu Li ◽  
Yi Tao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Hydrothermal Synthesis ◽  
Carbon Quantum Dots ◽  
Label Free ◽  
Label Free Detection ◽  
One Step

scholarly journals Peptide-Functionalized Quantum Dots for Rapid Label-Free Sensing of 2,4,6-Trinitrotoluene

2020 ◽  
Vol 31 (5) ◽  
pp. 1400-1407 ◽  
Author(s):  
Takumi Komikawa ◽  
Masayoshi Tanaka ◽  
Abiral Tamang ◽  
Stephen D. Evans ◽  
Kevin Critchley ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Label Free

Biogenic Quantum Dots for Sensitive, Label-Free Detection of Mercury Ions

2019 ◽  
Vol 2 (6) ◽  
pp. 2661-2667 ◽  
Author(s):  
Li-Jiao Tian ◽  
Yuan Min ◽  
Xue-Meng Wang ◽  
Jie-Jie Chen ◽  
Wen-Wei Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Label Free ◽  
Mercury Ions ◽  
Label Free Detection
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