Oriented growth behavior of Ag nanoparticles using SDS as a shape director

We report a chemical approach for synthesizing shape-controlled Ag nanoparticles by using the surfactant SDS as a soft template. The experimental approach includes a two-step reaction: the first step is quickly generating Ag seed clusters by a chemical reaction using sodium borohydride as a reducing reagent; the second is the slow growth of controllable Ag nanoparticles by a mild chemical reaction using hydroxylamine hydrochloride as a reducing reagent. Spherical, polyhedral, and fibrous Ag nanoparticles are synthesized successfully in aqueous solution having SDS concentrations of 0.01, 0.02, and 0.2 wt.%, respectively. Size, morphology, and dispersion stability of these Ag nanoparticles depend on the concentrations of both SDS and AgNO3.

Control over the shape of Ag nanoparticles using SDS micelles as soft templates.Figure optionsDownload high-quality image (52 K)Download as PowerPoint slide