 The spectroscopy of Er3+ electronic transitions in host crystals lattices of nanoparticles combined with ultrasonically formed geometries in aqueous solution of carbon nanotubes is of great interest for synthesis of photoluminescence nanoparticles in 'green' chemistry.Erbium oxide is among the most important rare earth metals used in biomedicine.The photoluminescence property of erbium oxide nanoparticles on carbon nanotubes makes them useful in biomedical applications.