抄録
Yttrium hydroxyl carbonate (Y(OH)CO3) precursor nanoparticles were synthesized by the homogeneous precipitation method with the presence of polyacrylic acid (PAAc). Resultant precursor particle size is about 20-30 nm with narrow distribution whereas the particle size is smaller than those acquired by the absence of PAAc. The particle size of the precipitated precursor without the PAAc addition has 230 nm with wide distributions. It was demonstrated that calcination of precursor materials at 1100 0C eventually removes the organic residues and inorganic anions from the precursors and subsequently provided well crystalline Y2O3 nanoparticles which was evident from FT-IR, XRD, FE-SEM and TEM analysis. Likewise, Er3+ doped Y2O3 nanoparticles obtained by the above method gives bright green (550 nm) and red (660 nm) upconversion emission under 980 nm excitation which are useful as bio-imaging probe.
