K Soga et al 2009 J. Phys.: Conf. Ser. 191 012003 doi:10.1088/1742-6596/191/1/012003
K Soga1,2, Y Okumura1, K Tsuji1 and N Venkatachalam2
Show affiliationsErbium-doped yttrium oxide nanoparticle is one of the most important for fluorescence bioimaging under near infrared excitation. Particle size of it below 100 nm is an important requirement for a cellular bioimaging. However, the synthesis with such small particles is difficult at the calcination temperature above 1200 °C due to the sintering and crystal growth of the particles. In this study, yttrium oxide nanoparticles with average size of 30 nm were successfully synthesized by using K3PO4 as a sintering inhibitor during the calcination. A single phase of cubic Y2O3 as the resultant material was confirmed by XRD, which was also confirmed to emit a bright upconversion emission under 980-nm excitation. Improvement of chemical durability due to the introduction of phosphate group on the surface of the Y2O3 particles is also reported.
81.16.-c Methods of nanofabrication and processing
87.85.Qr Nanotechnologies-design
Optics, quantum optics and lasers
Issue 1 (2009)
K Soga et al 2009 J. Phys.: Conf. Ser. 191 012003
Rakesh Choubisa and K K Sud 2008 J. Phys. B: At. Mol. Opt. Phys. 41 208002
Changhao Liang et al 2007 Nanotechnology 18 485202
G Lanzara and F-K Chang 2009 Smart Mater. Struct. 18 125001
Davide Gaiotto and Alessandro Tomasiello 2009 J. Phys. A: Math. Theor. 42 465205
M Meyyappan 2009 J. Phys. D: Appl. Phys. 42 213001
Herschel Rabitz 2009 New J. Phys. 11 105030
J Mark Heinzle and Hans Ringström 2009 Class. Quantum Grav. 26 145001
Fabrizio Colombo 2009 Inverse Problems 25 105007
J C Phillips 2007 J. Phys.: Condens. Matter 19 455213