Jing Chen, Changrun Guo, Meng Wang, Lei Huang, Liping Wang, Congcong Mi, Jing Li, Xuexun Fang, Chuanbin Mao, Shukun Xu
β-NaYF(4) : Yb,Er upconversion nanoparticles (UCNPs) can emit bright green fluorescence under near-infrared (NIR) light excitation which is safe to the body and can penetrate deeply into tissues. The application of UCNPs in biolabeling and imaging has received great attention recently. In this work, β-NaYF(4) : Yb,Er UCNPs with an average size of 35 nm, uniformly spherical shape, and surface modified with amino groups were synthesized by a one-step green solvothermal approach through the use of room-temperature ionic liquids as the reactant, co-solvent and template...
February 28, 2011: Journal of Materials Chemistry