Figure 4.

XPS spectra of the YVO4:Eu3+/YBO3heteronanostructures (SR = 1/2) YVO4:Eu3+nanocrystals and YBO3powder in range ofa135–210 eV andb495–555 eV

Zhu et al. Nanoscale Research Letters 2009 4:1009   doi:10.1007/s11671-009-9349-z