Modification of N,S co-doped graphene quantum dots with p-aminothiophenol-functionalized gold nanoparticles for molecular imprint-based voltammetric determination of the antiviral drug sofosbuvir

2019 ◽  
Vol 186 (9) ◽  
Author(s):  
Ashraf M. Mahmoud ◽  
Mohamed M. El-Wekil ◽  
Mater H. Mahnashi ◽  
Marwa F. B. Ali ◽  
Saad A. Alkahtani
Keyword(s):  
Quantum Dots ◽  
Gold Nanoparticles ◽  
Graphene Quantum Dots ◽  
Antiviral Drug ◽  
Voltammetric Determination ◽  
Functionalized Gold Nanoparticles ◽  
Molecular Imprint ◽  
Doped Graphene ◽  
Co Doped

scholarly journals A Fluorescence System Composed of Nitrogen-doped Graphene Quantum Dots and Gold Nanoparticles Coated With Phenylalanine for Selective and Sensitive Quantification of Piroxicam in Biological Samples

2022 ◽  
Author(s):  
Maryam Moallemi Bahmani ◽  
Ali Mohammad Haji Shabani ◽  
Shayessteh Dadfarnia ◽  
Roya Afsharipour
Keyword(s):  
Quantum Dots ◽  
Gold Nanoparticles ◽  
Limit Of Detection ◽  
Graphene Quantum Dots ◽  
Fluorescence Emission ◽  
Calibration Graph ◽  
Serum Samples ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Abstract In this study, a sensitive fluorimetric method is proposed for the determination of piroxicam using nitrogen graphene quantum dots (N-GQDs) and gold nanoparticles coated with phenylalanine. The fluorescence emission of N-GQDs at 440 nm decreases with the increase of gold nanoparticles coated with phenylalanine. However, the addition of piroxicam causes the release of gold nanoparticles from the surface of quantum dots followed by the retrieval of the fluorescence emission of N-GQDs. Under the optimum conditions, the calibration graph was linear in the concentration range of 2.0-35.0 nmol L-1 for piroxicam with a limit of detection of 0.11 nmol L-1. The developed method was successfully applied for the determination of piroxicam in urine and serum samples.

Electrolyzing synthesis of boron-doped graphene quantum dots for fluorescence determination of Fe3+ ions in water samples

Talanta ◽  
2017 ◽  
Vol 164 ◽  
pp. 100-109 ◽  
Author(s):  
Li Chen ◽  
Chuanli Wu ◽  
Pan Du ◽  
Xiaowei Feng ◽  
Ping Wu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Water Samples ◽  
Graphene Quantum Dots ◽  
Boron Doped ◽  
Fluorescence Determination ◽  
Doped Graphene

Mn, B, N Co-Doped Graphene Quantum Dots for Fluorescence Sensing and Biological Imaging

2021 ◽  
Author(s):  
Bingyang Li ◽  
Xiao Xiao ◽  
Menglei Hu ◽  
Yanxin Wang ◽  
Yiheng Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Biological Imaging ◽  
Fluorescence Sensing ◽  
Doped Graphene ◽  
Co Doped
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