Figure 7.

a Phase contrast image of NP-labeled HeLa cells. b Nanophosphor emission captured by FITC long-pass emission filter, which includes the red spectral region. c DAPI emission identifying cell nuclei. d overlay of b and c.

Sun et al. Nanoscale Res Lett 2011 6:24   doi:10.1007/s11671-010-9768-x