Shape Control Of Inorganic Nanocrystal By Surfactant

Owing to its special function and effect, nanoparticle not only play an important role in progress of science, but also has great potential in application. It breaks a new way for advance materials. Nanoparticles that have ideal morphology, size and structure are more excellent than those synthesized by artificial mineral in capability. The synthesis of bionic mineral through organic template has become an active research field. It is an important research field of colloid and interface science. Many kinds of ordered aggregation of amphiphilic surfactant have been considered the efficient "soft template" to prepare nanoparticles. In this article, different soft templates formed by sodium bis (2-ethylhexyl) sulf-osuccinate (AOT), nonyl phenol polyethyleneoxy ether (OÏ€-10) and cetyltrimethyla- mmonium bromide (CTAB) were used to fabricate CaCO₃, BaCO₃ and CeO₂/CuO nanoparticles with different morphology. After studying the transformation of the nanoparticles via changing surfactant style and concentration, we obtained the control theory. Furthermore, we discussed the effect of water pool, reaction time and concentration of reactant on the morphology of inorganic nanoparticles. In CTAB/cyclohexane/water reverse micelle, nanoparticles of CaCO₃ and BaCO₃ with special shape were synthesized through solvent hydrothermal method. In this article, we use CTAB as "soft template" to synthesize variety morphology of SnO2 nanoparticle in low temperature hydrothermal condition, and we discuss the effect concentration of CTAB on nanoparticles morphology and formation mechnism. Also, we synthesized PS/ZnO core-shell using soft and solid template separately. The products were characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), infrared spectra (IR), Raman spectra (Raman) and X-ray diffraction (XRD).