TY - DATA T1 - Fluorescent Magnetic Nanocrystals by Sequential Addition of Reagents in a One-Pot Reaction:  A Simple Preparation for Multifunctional Nanostructures PY - 2007/10/03 AU - Jinhao Gao AU - Bei Zhang AU - Yuan Gao AU - Yue Pan AU - Xixiang Zhang AU - Bing Xu UR - https://acs.figshare.com/articles/journal_contribution/Fluorescent_Magnetic_Nanocrystals_by_Sequential_Addition_of_Reagents_in_a_One_Pot_Reaction_A_Simple_Preparation_for_Multifunctional_Nanostructures/2982535 DO - 10.1021/ja0731017.s001 L4 - https://ndownloader.figshare.com/files/4683142 KW - Simple Preparation KW - sequence KW - reaction mixture KW - multifunctional nanostructures KW - core KW - spongelike nanostructures KW - area electron diffraction KW - quantum yields KW - cadmium precursor KW - fluorescence spectroscopy KW - transmission electron microscopy KW - FePt nanoparticles KW - semiconducting chalcogenides KW - Sequential Addition KW - room temperature N2 - Core−shell nanostructures consisting of FePt magnetic nanoparticles as the core and semiconducting chalcogenides as the shell were synthesized by a series of reactions in a one-pot procedure. Adding Cd(acac)2 as the cadmium precursor to a reaction mixture containing FePt nanoparticles afforded FePt@CdO core−shell intermediates. The subsequent addition of chalcogens yielded FePt@CdX core−shell nanocrystals (where X was S or Se). The reverse sequence of addition, i.e., adding X before Cd, resulted in spongelike nanostructures because the chalcogens readily formed nanowires in the solution. Transmission electron microscopy, energy-dispersive X-ray spectrometry, selected area electron diffraction, fluorescence spectroscopy, and SQUID were used to characterize the nanostructures. These core−shell nanostructures displayed superparamagnetism at room temperature and exhibited fluorescence with quantum yields of 2.3−9.7%. The flexibility in the sequence of addition of reagents, combined with the compatibility of the lattices of the different materials, provides a powerful yet convenient strategy for generating sophisticated, multifunctional nanostructures. ER -