title: Novel bifunctional magnetic-near-infrared luminescent nanocomposites: near-infrared emission from Nd and Yb.
abstract: Two kinds of bifunctional architectures combining the useful functions of a superparamagnetic nanoparticle and a near-infrared luminescent lanthanide complex into one material (denoted as Fe(3)O(4)@SiO(2)@Ln-PABI, PABI = N-(4-benzoic acid-yl)-N'-(propyltriethoxysilyl)urea, Ln = Nd and Yb) have been prepared via two main steps by a modified Stöber method and the layer-by-layer assembly technique. The two obtained architectures have been characterized by FTIR spectra, X-ray diffraction, transmission electron microscopy, emission spectroscopy, and vibrating sample magnetometer. These bifunctional nanocomposites exhibit superparamagnetic behaviour, high fluorescence intensity and color purity. Such materials with superparamagnetic and lanthanide-based near-infrared luminescence properties have potential applications in the field of biological luminescent labels.
authors.affiliation: College of Chemistry & Chemical Engineering, Inner Mongolia University, Hohhot, 010020, Inner Mongolia, PR China.
authors.forename: Shiyong
authors.initials: S
authors.lastname: Yu
authors.forename: Lianshe
authors.initials: L
authors.lastname: Fu
authors.forename: Yingjie
authors.initials: Y
authors.lastname: Zhou
authors.forename: Haiquan
authors.initials: H
authors.lastname: Su