title: Facile synthesis of multifunctional beta-NaGdF4:Yb3+/Er3+ nanoparticles in oleylamine.
abstract: Multifunctional beta-NaGdF4:Yb3+/Er3+ nanoparticles (NPs) were successfully synthesized using oleylamine as both solvent and stabilizer via the thermolysis method. They have uniform morphology with a mean size of 12.7 nm and show efficient up-conversion emission when excited by a 980 nm laser. The up-conversion NPs demonstrated a nearly quadratic dependence of the photoluminescence intensity on the excitation power, which indicated a two-photon induced process. In addition, these NPs exhibit paramagnetic characteristics at both 300 and 77 K. The magnetic properties of beta-NaGdF4:Yb3+/Er3+ NPs are intrinsic to the Gd3+ ions. The measured mass magnetic susceptibility value of 0.79 x 10(-4) em mu/g x Oe at room temperature is close to reported values of other NPs for bioseparation and optical-magnetic dual modal nanoprobes in biomedical imaging.
authors: School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.
authors: Qian
authors: Q
authors: Cheng
authors: Jiehe
authors: J
authors: Sui
authors: Yu
authors: Y
authors: Li
authors: Ziqiao
authors: Z
authors: Zhou
authors: Wei
authors: W
authors: Cai
mesh_terms: D000588:Amines / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D005682:Gadolinium / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012969:Sodium Fluoride / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000588:Amines; D046911:Macromolecular Substances; D012969:Sodium Fluoride; D005682:Gadolinium; C008703:oleylamine