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Fluorescent mesoporous silica nanoparticles functionalized graphene oxide: A facile FRET-based ratiometric probe for Hg2+.
- Source :
-
Sensors & Actuators B: Chemical . Jan2015, Vol. 206, p181-189. 9p. - Publication Year :
- 2015
-
Abstract
- This paper reported a facile method for fabricating a functionalized fluorescent graphene oxide (GO) by covalently grafting the amine-modified mesoporous silica nanoparticles (MSNs) containing poly(p-phenylenevinylene) (PPV) and lactam of Rhodamine 6G (SRh6G) inside the channel of MSNs. The resulted GO-PPV@MSN-NH 2 @SRh6G fluorescent hybrid nanoparticles had a good dispersion and strong green fluorescence in aqueous solution. This hybrid material can be used as a fluorescent ratiometric probe to detect Hg 2+ in the water through fluorescence resonance energy transfer (FRET). Upon the addition of only Hg 2+ ions, the mission corresponding to the ring-opened form of rhodamine appeared at 550 nm with a simultaneous emission quenching of PPV at 494 nm. This ratiometric fluorescence change indicated that an FRET from the PPV to rhodamine was triggered by Hg 2+ ions. The hybrid nanoparticles of GO-PPV@MSN-NH 2 @SRh6G could be used as a novel fluorescent probe to carry out the quantitative detection of Hg 2+ with a detection limit of 7.1 × 10 −8 M. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09254005
- Volume :
- 206
- Database :
- Academic Search Index
- Journal :
- Sensors & Actuators B: Chemical
- Publication Type :
- Academic Journal
- Accession number :
- 99508228
- Full Text :
- https://doi.org/10.1016/j.snb.2014.09.051