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Iron oxide magnetic nanoparticles were covalently modified by a fluorescent 8-aminoquinoline derivative and formed an optical sensor to be used as a highly sensitive and selective Zn2+ ions fluorescent nanosensor in aqueous solution at pH 7.0. The nanosensor was sufficiently characterized by physicochemical methods. The sensor can detect Zn2+ ions in aqueous solution with a submicromolar sensitivity of 0.1μM, and the interfering metal ions can not influence its selectivity. MTT assay experiments indicated that the sensor showed no apparent cytotoxicity.
| Journal: | Sensors and Actuators B: Chemical | |
| Year: | 2011 | |
| Publication date: | 25-08-2011 |
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