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Fluorescence and Sensing Applications of Graphene Oxide and Graphene Quantum Dots: A Review
Author(s) -
Zheng Peng,
Wu Nianqiang
Publication year - 2017
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201700814
Subject(s) - graphene , quantum dot , förster resonance energy transfer , oxide , materials science , fluorescence , photoluminescence , nanotechnology , quenching (fluorescence) , biosensor , photoinduced electron transfer , optoelectronics , electron transfer , photochemistry , chemistry , optics , physics , metallurgy
Graphene oxide and graphene quantum dots are attractive fluorophores that are inexpensive, nontoxic, photostable, water‐soluble, biocompatible, and environmentally friendly. They find extensive applications in fluorescent biosensors and chemosensors, in which they serve as either fluorophores or quenchers. As fluorophores, they display tunable photoluminescence emission and the “giant red‐edge effect”. As quenchers, they exhibit a remarkable quenching efficiency through either electron transfer or Förster resonance energy transfer (FRET) process. In this review, the origin of fluorescence and the mechanism of excitation wavelength‐dependent fluorescence of graphene oxide and graphene quantum dots are discussed. Sensor design strategies based on graphene oxide and graphene quantum dots are presented. The applications of these sensors in health care, the environment, agriculture, and food safety are highlighted.