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Facile synthesis of multifunctional beta-NaGdF4:Yb3+/Er3+ nanoparticles in oleylamine.
|Title||Facile synthesis of multifunctional beta-NaGdF4:Yb3+/Er3+ nanoparticles in oleylamine.|
|Publication Type||Journal Article|
|Year of Publication||2013|
|Authors||Cheng Q, Sui J, Li Y, Zhou Z, Cai W|
|Journal||Journal of nanoscience and nanotechnology|
|Date Published||2013 Jan|
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.
|Alternate Journal||J Nanosci Nanotechnol|