Detecting Mercury (II) and Thiocyanate Using "Turn-on" Fluorescence of Graphene Quantum Dots.
J Fluoresc
; 30(5): 1181-1187, 2020 Sep.
Article
in En
| MEDLINE
| ID: mdl-32691262
ABSTRACT
In this work, 1.8 nm graphene quantum dots (GQDs), exhibiting bright blue fluorescence, were prepared using a bottom-up synthesis from citric acid. The fluorescence of the GQDs could be almost completely quenched (about 96%) by adding Hg2+. Quenching was far less efficient with other similar heavy metals, Tl+, Pb2+ and Bi3+. Fluorescence could be near quantitatively restored through the introduction of thiocyanate. This "turn-on" fluorescence can thus be used to detect both or either environmental and physiological contaminants mercury and thiocyanate and could prove useful for the development of simple point-of-care diagnostics in the future. Graphical Abstract.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Thiocyanates
/
Quantum Dots
/
Fluorescent Dyes
/
Graphite
/
Mercury
Language:
En
Journal:
J Fluoresc
Journal subject:
BIOFISICA
Year:
2020
Type:
Article
Affiliation country:
Iran