Fig. 2From: Magnetic Assembly Route to Construct Reproducible and Recyclable SERS SubstrateThe XRD patterns of (a) Fe3O4, (b) Fe3O4@SiO2, (c) Fe3O4@SiO2@TiO2, and (d) Fe3O4@SiO2@TiO2@Ag, respectivelyBack to article page