title: Synthesis and characterization of a new trifunctional magnetic-photoluminescent-oxygen-sensing nanomaterial.
abstract: Magnetic Fe(2)O(3) nanoparticles coated with SiO(2) chemically doped with a Ru(II) complex were prepared using a simple solution based method. Field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) showed that the Fe(2)O(3) nanoparticles with a mean diameter of ∼115 nm were successfully coated with Ru(II) complex-chemically doped SiO(2) shell with a thickness of ∼30 nm. The obtained nanocomposite material showed a strong magnetic response to a varying magnetic field, exhibited the bright red triplet metal-to-ligand charge transfer ((3)MLCT) emission, and its photoluminescent intensity was sensitive to oxygen concentration. Compared with the Ru(II) complex in silica gels, the Ru(II) complex in the magnetic-optical-oxygen-sensing nanocomposite demonstrated improved thermodynamic stability of emissions. These nanocomposites are also nontoxic and easily conjugated with biomolecules. Their magnetic, photoluminescent and oxygen-sensing properties make them promising candidates for cell separation, biomarkers and optical oxygen sensors, which can measure the O(2) concentration in biological bodies.
authors: Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 16 Eastern South-Lake Road, Changchun 130033, People's Republic of China. Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100039, People's Republic of China.
authors: Lina
authors: L
authors: Liu
authors: Bin
authors: B
authors: Li
authors: Jun
authors: J
authors: Ying
authors: Xiudong
authors: X
authors: Wu
authors: Haifeng
authors: H
authors: Zhao
authors: Xinguang
authors: X
authors: Ren
authors: Dongxia
authors: D
authors: Zhu
authors: Zhongmin
authors: Z
authors: Su