Figure 7.

Fluorescence response of DTH-Fe3O4@SiO2 (A) and DTH (B) to various cations. Excitation wavelength was 397 nm. Spectra were recorded every 25 min after adding Zn2+.

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