Fig. 8From: The Preparation of Au@TiO2 Yolk–Shell Nanostructure and its Applications for Degradation and Detection of Methylene Blue a The SERS spectra of 1.0 × 10−5 M MB solution collected on the substrates with different Au-x@TiO2. b The SERS spectra of MB with different concentrations collected on the Au-30@TiO2 substrateBack to article page