A highly order-structured membrane electrode assembly with vertically aligned carbon nanotubes for ultra-low Pt loading PEM fuel cells - Chua, Daniel.; Feng, Yuan Ping.; Lim, San Hua.; Lin, Jianyi.; Luo, Zhiqiang.; Poh, Chee Kok.; Shen, Pei Kang.; Shen, Zexiang.; Tang, Zhe.; Tian, Zhi Qun.; Xia, Zetao.