Preparation of Aunanorods@B-SiO2

Herein, a simple method for etching Au_nanorods@SiO₂ surface to obtain Au_nanorods@B-SiO₂ material is reported, which is used for the theoretical study of drug loading and release of composite materials by microcalorimetry. In the presence of surfactant cetyltrime-thylammonium bromide (CTAB), the Au_nanorods@SiO₂ is etched under the strong acid environment with pH of about 2 to obtain the ideal material Au_nanorods@B-SiO₂. Relevant experimental results show that after etching, Au_nanorods@B-SiO₂ still retains the morphology, structure, and composition of a single material, and its LSPR absorption is almost consistent with Au nanorods. The successful preparation of Au_nanorods@B-SiO₂ combines the properties of Au nanorods and silicon dioxide to provide a basic material for medical cancer diagnosis and treatment.