Laboratory study demonstrates photo-induced synthesis of silver nanoplates into gold nanorings via galvanic replacement, highlighting a novel approach to hollow nanomaterials.
Key Points
Synthesize triangular silver nanoplates using light irradiation and use them as sacrificial templates to generate triangular gold nanorings.
Irradiated aqueous dispersions of spherical silver colloids with visible light in the presence of poly(vinyl pyrrolidone) and sodium citrate to induce triangular nanoplate formation.
Conducted a galvanic displacement reaction by introducing aqueous hydrogen tetrachloroaurate (HAuCl4) to the silver nanoplate suspension.
Characterized the resulting nanostructures using transmission electron microscopy (TEM).