GRAM-SCALE SYNTHESIS OF WELL-DEFINED GOLD NANORODS

摘要

A method of making gold nanorods wherein the total mass of gold nanorods is more than one gram includes (1) adding a seed solution containing gold nanostructures and/or residual NaBH4 reducing agent to an aqueous growth solution to form a nanorod solution; and (2) adding ascorbic acid solution slowly in small incremental portions to the nanorod solution. Gold nanorods made by this process according have an aspect ratio typically from about 1.1 to about 100, an average diameter in a range from about 5-50 nm, and an average length in a range from about 50 to about 200 nm.