Fig. 19From: Classification, Synthesis, and Application of Luminescent Silica Nanoparticles: a Reviewa Confocal microscopy and OM (inset) images of silica@EuCP microspheres. b Luminescence spectra with different Cu (NO3)2 in MeCN; luminescence intensity changes (c) and photograph (d) with different metal ion solutions (5 mM) [37]Back to article page