Microstructure and H2 gas sensing properties of undoped and Pd-doped SnO2 nanowires Yanbai Shen, Toshinari Yamazaki, Zhifu Liu, Dan Meng, Toshio Kikuta, Noriyuki Nakatani, Mitsufumi Saito, Masayuki Mori Sens. Actuator. B, 135, 524-529 (2009). 15-Jan-09