Quantification of neomycin in rubella vaccine by off/on metal ion mediated photoluminescence from functionalized graphene quantum dots

The paper reports the synthesis of nickel-silver-graphene quantum dot-graphene hybrid. Histidine-functionalized graphene quantum dots (His-GQDs) were bonded to graphene oxide (GO) and then combined with Ni2+ and Ag+ to form...

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Red-fluorescent graphene quantum dots from guava leaf as a turn-off probe for sensing aqueous Hg(ii)

New Journal of Chemistry ◽

10.1039/d0nj06259f ◽

2021 ◽

Vol 45 (10) ◽

pp. 4617-4625

Author(s):

Rahul V. Khose ◽

Goutam Chakraborty ◽

Mahesh P. Bondarde ◽

Pravin H. Wadekar ◽

Alok K. Ray ◽

...

Keyword(s):

Quantum Dots ◽

Metal Ion ◽

Leaf Extract ◽

Graphene Quantum Dots ◽

Toxic Metal ◽

Guava Leaf

In this work, we have prepared red-fluorescent graphene quantum dots and utilized as a highly selective and sensitive fluorescence turn-off probe for detection of the toxic metal ion Hg2+ from guava leaf extract.

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Photoluminescence suppression effect caused by histamine on amino-functionalized graphene quantum dots with the mediation of Fe 3+ , Cu 2+ , Eu 3+ : Application in the analysis of spoiled tuna fish

Microchemical Journal ◽

10.1016/j.microc.2017.04.013 ◽

2017 ◽

Vol 133 ◽

pp. 448-459 ◽

Cited By ~ 14

Author(s):

Carlos A.T. Toloza ◽

Sarzamin Khan ◽

Renan L.D. Silva ◽

Eric C. Romani ◽

Dunieskys G. Larrude ◽

...

Keyword(s):

Quantum Dots ◽

Graphene Quantum Dots ◽

Functionalized Graphene ◽

Tuna Fish ◽

Suppression Effect

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Tumor Cell-Specific Nuclear Targeting of Functionalized Graphene Quantum Dots In Vivo

Bioconjugate Chemistry ◽

10.1021/acs.bioconjchem.7b00466 ◽

2017 ◽

Vol 28 (10) ◽

pp. 2608-2619 ◽

Cited By ~ 11

Author(s):

Chenjie Yao ◽

Yusong Tu ◽

Lin Ding ◽

Chenchen Li ◽

Jiao Wang ◽

...

Keyword(s):

Quantum Dots ◽

Tumor Cell ◽

Graphene Quantum Dots ◽

Functionalized Graphene ◽

Nuclear Targeting

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The electron-transfer based interaction between transition metal ions and photoluminescent graphene quantum dots (GQDs): A platform for metal ion sensing

Talanta ◽

10.1016/j.talanta.2013.08.055 ◽

2013 ◽

Vol 117 ◽

pp. 152-157 ◽

Cited By ~ 73

Author(s):

Hongduan Huang ◽

Lei Liao ◽

Xiao Xu ◽

Mingjian Zou ◽

Feng Liu ◽

...

Keyword(s):

Quantum Dots ◽

Electron Transfer ◽

Transition Metal ◽

Metal Ions ◽

Metal Ion ◽

Graphene Quantum Dots ◽

Transition Metal Ions ◽

Ion Sensing ◽

Metal Ion Sensing

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L-cysteine functionalized graphene quantum dots for sub-ppb detection of As (III)

Nanotechnology ◽

10.1088/1361-6528/ac353b ◽

2021 ◽

Author(s):

Md. Farhan Naseh ◽

Neelam Singh ◽

Jamilur R. Ansari ◽

Ashavani Kumar ◽

Tapan Sarkar ◽

...

Keyword(s):

Electron Microscopy ◽

Quantum Dots ◽

Room Temperature ◽

Graphene Quantum Dots ◽

Optical Characterization ◽

Functionalized Graphene ◽

Transmission Electron ◽

Sensitivity And Selectivity ◽

Structural Characterizations

Abstract Here, we report functionalized graphene quantum dots (GQDs) for the optical detection of arsenic at room temperature. GQDs with the fluorescence of three fundamental colors (red, green, and blue) were synthesized and functionally capped with L-cysteine (L-cys) to impart selectively towards As (III) by exploiting the affinity of L-cys towards arsenite. The optical characterization of GQDs was carried out using UV-Vis absorption spectroscopy, Fourier transform infrared spectroscopy, and fluorescence spectrometry and the structural characterizations were performed using transmission electron microscopy. The fluorescence results showed instantaneous quenching in intensity when the GQDs came in contact with As (III) for all test concentrations over a range from 0.025 ppb to 25 ppb, which covers the permissible limit of arsenic in drinking water. The experimental results suggested excellent sensitivity and selectivity towards As (III).

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