Preparation of a Novel Three-Dimensional TiO2 Macroporous/TiO2 Nanorods/Ag Nanoparticles Composite Nanostructure and its Use as SERS Substrates

A novel composite nanostructure which is made up of TiO 2 three dimensionally ordered macroporous (3DOM) nanostructure and TiO 2 nanorods (NRs) has been successfully synthesized through a combination of colloidal crystal template technology and hydrothermal method, then we achieved its combination with Ag nanoparticles (NPs) via a silver mirror reaction. We studied the SERS (Surface-Enhanced Raman Scattering) performance of the obtained structure, the results show that our samples are very sensitive substrates when being used to detect dye R6G molecules, with a low detection concentration of 10 − 1 1 M. This proves that it is a promising material in the area of analyzing and molecule-level detecting as a kind of novel and low-cost SERS substrate.