Intense X-ray luminescence from CdTe nanoparticles is observed when CdTe particles are encapsulated into BaFBr:Eu2+ phosphors. In contrast, negligible X-ray luminescence is observed from the unencapsulated nanoparticles, either in solution or in solid form. The origin of the X-ray luminescence is attributed to the effective energy transfer from Eu2+ ions to CdTe nanoparticles in the nanocomposite materials. The X-ray luminescence of these nanocomposites is dose dependent and the emission wavelength is size-adjustable which may allow use as a new type of dosimeter for both in vitro and in vivo applications.
Revised: March 29, 2006 |
Published: February 1, 2006
Citation
Chen W., J. Zhang, S.L. Westcott, A.G. Joly, J. Malm, and J. Bovin. 2006.The Origin of X-ray Luminescence from CdTe Nanoparticles in CdTe/BaFBr:Eu2+ Nanocomposite Phosphors.Journal of Applied Physics 99, no. 3:Art. No. 034302.PNNL-SA-45966.