Synthesis and Manipulation of High Aspect Ratio Gold Nanorods Grown Directly on Surfaces

摘要

Here we describe the synthesis of Au nanorods directly on glass surfaces using seed-mediated deposition of Au from AuCL_4~- onto surface-attached 3-5 nm diameter Au nanoparticles (AuNPs) in the presence of cetyltrimethylammonium bromide (CTAB).The average length (200 nm to 1.2mum) and aspect ratio (6-22) of the nanorods increases with increasing AuCl_4~- concentration.Short,low aspect ratio Au nanorods are manipulated with an atomic force microscopy (AFM) tip,while longer,high aspect ratio nanorods are bent and broken with the AFM tip.