Large-Scale Silica Overcoating of Gold Nanorods with Tunable Shell Thicknesses.

ABSTRACT: Gold nanorods (GNRs) overcoated with SiO₂ are of interest for enhancing the shape stability of GNRs during photo-thermal heating, for further functionalization with silanes, and for biomedical applications. While methods have recently been developed for synthesizing GNRs on a large scale, SiO₂ overcoating of GNRs is still conducted on a small reaction scale. Here, we report a method for large-scale synthesis of SiO₂-overcoated GNRs (SiO₂-GNRs), which gives ~190 mg of SiO₂-GNRs. SiO₂ is deposited onto and encapsulates the cetyltrimethylammonium bromide (CTAB) coatings that stabilize GNRs by adding tetraethoxysilane (TEOS) via syringe pump. Control over the CTAB concentration is critically important for obtaining uniform overc

SUBMITTER: Wu WC 

PROVIDER: S-EPMC4486371 | biostudies-literature | 2015 Apr

REPOSITORIES: biostudies-literature