A novel graphene oxide-based fluorescent nanosensor for selective detection of Fe(3+) with a wide linear concentration and its application in logic gate

Biosensors & Bioelectronics
Liang HeJohn H Xin

Abstract

A graphene oxide-based fluorescent nanosensor AGO has been designed and synthesized by covalent grafting allylamine onto GO surface. In aqueous media, AGO displays a highly selective and sensitive discrimination of Fe(3+) from Fe(2+) and other metal ions through electron transfer-induced fluorescence quenching. The quenching of AGO fluorescence is linearly proportional to Fe(3+) concentration in a wide range of 0-120μM (correlation coefficient R(2)=0.9994). Moreover, AGO can be used to construct a combinational three-input logic gate to discriminate Fe(3+) and Fe(2+). The logic gate works well in intracellular fluorescence imaging, which shows a potential as a promising platform for biosensing analysis.

References

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Citations

Jul 26, 2017·Chemistry, an Asian Journal·Peng Zheng, Nianqiang Wu
Jan 27, 2021·Materials·Jeong-Woo ChoiSang-Nam Lee
Oct 24, 2020·Scientific Reports·Yasaman EsmaeiliChun Cheng
Feb 23, 2021·Frontiers in Chemistry·Xiao-Guang GaoFei Xing
Jan 21, 2017·Analytical Chemistry·Jungho KimDal-Hee Min

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