Fig. 11. (a) Synthetic scheme of CdS decorated FePt heterocrystalline nanoparticle (b) TEM image of FePt@CdS core–shell nanocrystals (inset: magnified image of HRTEM image) (c) TEM image of FePt@CdSe core–shell nanocrystals (inset: magnified image of HRTEM image). Reproduced from ref. 105 with permission from American Chemical Society, copyright 2007. (d) HRTEM image and (e) SAED pattern of Fe₃O₄–CdSe heterodimers (f) the UV-visible and fluorescence spectra of Fe₃O₄–CdSe nanoparticles in hexane solution (g) fluorescence images of Fe₃O₄–CdSe nanoparticles in hexane solution before and after attraction by a small magnet (excited at 365 nm). Reproduced with permission from ref. 148 with permission from American Chemical Society, copyright 2008. (h) Schematic illustration for synthesis of CdS/FePt core–shell magnetic quantum dots and formation of heterodimer (i) TEM image of heterodimer (j) magnified HRTEM image of heterodimer showing surface attachment of quantum dots. Reproduced with permission from ref. 103 with permission from American Chemical Society, copyright 2004.