Figure 10.

UV-Vis spectra. (A) Absorption spectra of (a) DTH-APTES (1.0 × 10-5 M), (b) DTH-APTES + Zn2+ (1.0 × 10-4 M), (c) DTH-Fe3O4@SiO2 (0.3 g/L), and (d) DTH-Fe3O4@SiO2 (0.3 g/L) + Zn2+ (1.0 × 10-4 M) in ethanol. (B) UV-Vis spectra of DTH-Fe3O4@SiO2 (0.3 g/L) in ethanol in the presence of different amounts of Zn2+ (0 to 240 μM).

Wang et al. Nanoscale Research Letters 2012 7:86   doi:10.1186/1556-276X-7-86
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