Skip to main content
. Author manuscript; available in PMC: 2008 Sep 29.
Published in final edited form as: J Am Chem Soc. 2007 Feb 9;129(9):2669–2675. doi: 10.1021/ja0680257

Figure 6.

Figure 6

Two-photon excited fluorescence spectra of the same amount of water-dispersed silica nanoparticles, entrapping (a) 1.1 wt% HPPH, (b) 1.1 wt% HPPH/10 wt% BDSA, and (c) 1.1 wt% HPPH/20 wt% BDSA. The excitation wavelength is 850 nm.