Jeong-Hoon Jeun, Kyu-Young Park, Dai-Hong Kim, Won-Sik Kim, Hong-Chan Kim, Byoung-Sun Lee, Honggu Kim, Woong-Ryeol Yu, Kisuk Kang and Seong-Hyeon Hong*, “SnO2@TiO2double-shell nanotubes for a lithium ion battery anode with excellent high rate cyclability” Nanoscale 5 (2013) 8480-8483