Fig. 4From: The Preparation of Au@TiO2 Yolk–Shell Nanostructure and its Applications for Degradation and Detection of Methylene BlueHRTEM images of a TiO2 and b Au-30@TiO2, in which the top right inset in b shows the SAED patterns of Au-30@TiO2 nanostructure. High-resolution XPS of c Ti 2p and d Au 4f of Au-30@TiO2 Back to article page