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(A) HRTEM image and (B) EDP analysis of Fe3O4-CdSe heterodimers. (C) The UV-Vis and fluorescence spectra of Fe3O4-CdSe NPs in hexane solution. (D) The fluorescence images of the hexane solution of Fe3O4-CdSe NPs before and after attraction by a small magnet (excited by a UV lamp, λex = 365 nm). Reproduced with permission from Ref. 42. Copyright (2008) American Chemical Society.
