Fig. 4From: Fucoidan with three functions extracted from Sargassum aquifolium integrated rice-husk synthesis dual-imaging mesoporous silica nanoparticlea The fluorescence characteristics of rMSN-EuGd; b IVIS observes the fluorescence signals of rMSN and rMSN-EuGd at an excitation wavelength of 430Â nm; c rMSN-EuGd doped with different proportions of Eu3+ and Gd3+ SQUID analysis chart: d T1 MRI image of rMSN-EuGdBack to article page