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Preparation of NaCl Nanoparticles in Nonaqueous Reverse Microemulsion

Zhang Li Cheng Hu Min Ma Ji Ming (College of Chemistry and Molecular Engineering,Peking University,Beijing 100871)  
Water soluble NaCl nanoparticles were prepared by reacting NaAc with HCl in ethanol/Brij 30/hexadecane microemulsion.The particles obtained are crystalline spheres with an average particle size of about 60 nm.In the case of using formamide/AOT/n heptane microemulsion as the reaction medium,NaCl particles can only be obtained by adding precipitant after the reaction.The latter particles are crystalline cubes with a much larger particle size(1 μm).The results show that nonaqueous reverse microemulsion may provide a new medium for the preparation of water soluble nanoparticles and the choice of the polar solvent is critical to obtain nanosized materials.
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