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Synthesis and Characterization of Red‐Luminescent Graphene Oxide Functionalized with Silica‐Coated Eu 3+ Complex Nanoparticles
Author(s) -
Zhao Chao,
Feng Lingyan,
Xu Bailu,
Ren Jinsong,
Qu Xiaogang
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201003712
Subject(s) - luminescence , graphene , nanoparticle , materials science , nanomaterials , oxide , fluorescence , quantum yield , covalent bond , nanotechnology , carbodiimide , photochemistry , chemical engineering , chemistry , polymer chemistry , organic chemistry , optoelectronics , optics , physics , engineering , metallurgy
Traditional dye‐doped fluorescent graphene oxide (GO) reveals a low quantum yield and a short life expectancy. Herein, red‐luminescent silica‐coated Eu 3+ complex nanoparticles were synthesized and covalently coupled to GO nanosheets by means of a carbodiimide‐mediated amidation process. SEM and TEM studies demonstrated successful attachment of the silica‐coated Eu 3+ complex nanoparticles onto the GO surface. Spectroscopic studies showed that the GO–nanoparticle conjugates exhibit strong luminescence, long lifetimes, as well as good photostability, which suggests that this new type of luminescent nanomaterial has the potential for highly sensitive time‐resolved fluorescence cyto‐ and histochemistry imaging.