| In core-shell materials,core and shell are made up of different materials ,they are connected with physical and chemical actions,they may be macromolecule,mineral and metal.This peculiarity cause core-shell materials have the excellence of both two composings. Core-shell materials are known to exhibit unique and advanced properties over single-component nanoparticles,making them attractive for use in a wide range of applications , and are therefore of extensive scientific and technological interest. Nano-dimension core-shell materials have good future in chemistry,physics,electronics,biological technology and material science.Nowadays,one of the most effective approachs to produce core-shell materials is hard template method. There are many merits such as simplicity,high repeating ratio and being foreseeable for this method.In this article,monodispersed silica particles templates were produced by St?ber method.Utilizing the silver mirror reaction,the well-dispersed silica particles are used as the template,the uniform ,well-dispersed SiO2/Ag composite microspheres and hollow Ag particles were produced,The morphology and structure of the particles were characterized by transmission electron microscopy and X-ray powder diffraction.In inorganic acid,organic acid,phenol or ester existing,monodispersed Cu2O particles were used as the template,Cu2O/Ag composite microspheres were produced. the morphology and structure of the particles were characterized by transmission electron microscopy and X-ray powder diffraction.Form transmission electron microscopy,we find the core-shell composite microspheres were cubic.When phenol joined into the reaction,the final productions were Ag hollow composite,when ester attended the reaction,afer removing the core,only small particles leaved.Their connection was leak,we can find cubic composite by carefully observing.The acidity of the reactant is a important role in the reaction.It cannot get core-shell composit when the acidity of the reactant is strong.
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