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Fig. 4 | Nanoscale Research Letters

Fig. 4

From: A Resumable Fluorescent Probe BHN-Fe3O4@SiO2 Hybrid Nanostructure for Fe3+ and its Application in Bioimaging

Fig. 4

a Schematic show of BHN-Fe3O4@SiO2 with Fe3+. b Reversibility of BHN-Fe3O4@SiO2 towards Fe3+. Inset: the photograph of BHN-Fe3O4@SiO2 with Fe3+ by treatment of EDTA (2.5 × 10−5 M) under 415-nm UV light. c Plot of the fluorescence of BHN-Fe3O4@SiO2 (0.2 g/L) with alternate adding of 2.5 × 10−5 M Fe3+ (“off”) and EDTA (“on”). d BHN-Fe3O4@SiO2 (0.2 g/L) was dispersed to an external magnet in CH3CN/H2O 1:1 (HEPES buffer pH 7.36)

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