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. 2014 Mar 25;9(1):146. doi: 10.1186/1556-276X-9-146

Figure 4.

Figure 4

FTIR spectra. (a) OCMCS, (b) OCMCS-FA, (c) Fe3O4@SiO2, and (d) Fe3O4@SiO2-OCMCS-FA.