Additional file 1.

Supporting information. Table S1. Experimental results at different reaction conditions. Table S2. Different Re3+ ion (Re = Y, Eu, La, Sm, Tb, Pr) influence on the product during synthesis process. Figure S1. TEM images of different reaction temperatures, [Eu3+] = 0.06 mol/L, 12 h. Figure S2. TEM images of different Eu3+ concentrations, 250°C, 12 h. Figure S3. TEM images of different pH values of solutions, 250°C, [Eu3+] = 0.06 mol/L, 12 h. Figure S4. TEM images of SiO2 · Re2O3 HSs prepared by different Re 3+ assistance: T = 250°C, pH = 4, [Re3+] = 0.06 mol/L, t = 12 h (Re = Y, Eu, La, Sm, Tb, Pr).

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Li et al. Nanoscale Research Letters 2013 8:435   doi:10.1186/1556-276X-8-435