期刊
DYES AND PIGMENTS
卷 113, 期 -, 页码 102-109出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2014.07.040
关键词
Fluorescence nanomaterials; Mesoporous silica nanoparticles; Conjugated polymer; PPV@MSN@CdTe; FRET; Cu2+ detection
资金
- National Natural Science Foundation of China [21074019]
- Natural Science Foundation of Jilin Province [20101539]
This paper reported a facile method for fabricating CdTe quantum dots decorated fluorescent mesoporous silica nanoparticles containing poly(p-phenylenevinylene) by electrostatic interaction in aqueous solution. The resulted fluorescent hybrid nanomaterials showed the dual-emission centered at 500 nm and 717 nm, which can be used as a fluorescent probe to detect Cu2+ in water through fluorescence resonance energy transfer. Cu2+ can be captured by the amino groups of the polyethyleneimine to form an absorbent complex, resulting in a strong quenching of red-emission from CdTe quantum dots on the surface of nanoparticles via energy transfer. However, the green-emission of poly(p-phenylenevinylene) remained. Therefore the addition of Cu2+ induced the fluorescent evolution of the nanoprobe from red to green. The nanoprobe provided an efficient platform for the sensing of Cu2+ with a detection limit of 31.2 nM. Compared with pure quantum dots, the nanoprobe can distinguish Cu2+ from Hg2+. (C) 2014 Elsevier Ltd. All rights reserved.
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