Figure 1From: FITC and Ru(phen)3 2+ co-doped silica particles as visualized ratiometric pH indicator Preparation of FITC and Ru(phen) 3 2+ co-doped silica particles and TEM images of the Ru(phen) 3 2+ -doped particles. (A) Procedures for preparation of the FITC (green) and Ru(phen)3 2+ (red) co-doped silica particles. TEM images of the Ru(phen)3 2+-doped particles (B) before and (C) after the shell growth and graft of FITC.Back to article page