Room Temperature Synthesis of Gold Nanokites in Polyvinyl Alcohol-Sodium Dodecyl Sulfate Aggregations Aqueous Solution

摘要

Controlled synthesis of asymmetrical gold nanokites was realized by reducing HAuCl₄ with polyvinyl alcohol (PVA) in PVA-sodium dodecyl sulfate (SDS) aggregations aqueous solution at room temperature without any additional reducing agents. The crystal structures, optical property and growth process of the gold nanokites were investigated by X-ray diffraction (XRD), Vis-NIR spectrum and transmission electron microscope (TEM). HAuCl₄ concentration dramatically influenced the morphologies of the products. When HAuCl₄ concentration was increased from 0.5 mmol·L?1 to 2.2 mmol·L?1, the products changed from network-like nanostructures to nanokites, nanoleaves and microplates. SDS was indispensable for the formation of gold nanokites and without SDS super-branched structures became the dominant products.