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 Fe3+from Fe2+and other metal ions through electron transfer-induced fluorescence quenching. The quenching of AGO fluorescence is linearly proportional to Fe3+concentration in a wide range of 0-120μM (correlation coefficient R2=0.9994). Moreover, AGO can be used to construct a combinational three-input logic gate to discriminate Fe3+and Fe2+. The logic gate works well in intracellular fluorescence imaging, which shows a potential as a promising platform for biosensing analysis.
| Original language | English |
|---|---|
| Pages (from-to) | 69-73 |
| Number of pages | 5 |
| Journal | Biosensors and Bioelectronics |
| Volume | 70 |
| DOIs | |
| Publication status | Published - 5 Aug 2015 |
Keywords
- Cell imaging
- Electron buffer
- Graphene oxide
- Logic gate
- Nanosensor
ASJC Scopus subject areas
- Biotechnology
- Biophysics
- Biomedical Engineering
- Electrochemistry
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