Hexagonal trumpet-like sodium hexafluorosilicate(SFS) flowers,grown on an ordered porous polystyrene film(OPPF),were prepared via a synchronous dissolution/regrowth process.Their formation process can be divided into several steps:first,the dissolution of the silica spheres induced the crystallization of SFS onto the OPPF;second,some pores emerged on the closely packed bumps when being blown by the SiF_4 gas;third,when the crystal was blown by continuous gas from the pores,the span of the top became larger than that of the bottom.
Li-Guo SunZheng JinDong-Mei ZhaoShu-Hong WangCheng Wang
