摘要
Nearly monodisperse spherical amorphous Se colloids are prepared by the dismutation of Na_(2)SeSO_(3)solution at room temperature;by altering the pH of the solution,amorphous Se colloid spheres with sizes of about 120 nm,200 nm,300 nm,and 1μm can be obtained.Se@Ag2Se core/shell spheres are successfully synthesized by using the obtained amorphous Se(a-Se)spheres as templates,indicating the potential applications of these Se nanomaterials in serving as soft templates for other selenides.Meanwhile,selenium nanowires are obtained through a“solid-solution-solid”growth process by dispersing the prepared Se spheres in ethanol.This simple and environmentally benign approach may offer more opportunities in the synthesis and applications of nanocrystal materials.
基金
This work was supported by NSFC(90606006)
the State Key Project of Fundamental Research for Nanoscience and Nanotechnology(2006CB932300)
the Key Grant Project of Chinese Ministry of Education.(NO.306020).
