Journal
LANGMUIR
Volume 26, Issue 14, Pages 11774-11778Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la101714q
Keywords
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Funding
- National Natural Science Foundation of China [20904003]
- Ministry of Education of China [NCET-08-0725]
- Fundamental Research Funds for the Central Universities of China
- State Key Lab of Advanced Metals and Materials of China [2009ZD-04]
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A novel fluorescent nanoparticle was prepared via a simple self-assembly technique based on water-soluble conjugated polymers (CPs) and Ag@SiO2 core-shell nanoparticles. Core-shell nanoparticles with silver NPs core show a unique property referred to as metal-enhanced fluorescence (MEF). In the present work, the cationic conjugated polymer poly[9,9'-bis(6 ''-(N,N,N-trimethylammonium)-hexyl) fluorene-2,7-ylenevinylene-co-alt-1,4-phenylene dibromide] (PFV) was hybridized with Ag@SiO2 NPs via simple self-assembly procedure, and given high stability, monodispersity. The fluorescence intensity of PFV after assembling on Ag@SiO2 core-shell NPs is enhanced 1.3-fold compared with the fluorescence intensity of PFV assembled on silica NPs without silver cores for the M El: property of the Ag@SiO2 nanostructure. Nanocomposite with bright fluorescence was obtained. Moreover, the nanocomposition exhibits good monodispersity and low cytotoxicity, which promote their application in cellular imaging. Furthermore, fluorescent nanoparticles with amendable peripheral surfaces can also be potentially obtained because of the easy modification property of CPs and give potential application in selective biological sensing and imaging.
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