Xingke Cai, Hongtao Cong *, Chang Liu，Synthesis of vertically-aligned carbon nanotubes without a catalyst by hydrogen arc discharge，Carbon 2012, 50 (8), 2726-2730.Shi CX, Cong HT*, Tuning the coercivity of Fe-filled carbon-nanotube arrays by changing the shape anisotropy of the encapsulated Fe nanoparticles，J. Appl. Phys. 2008, 104: 034307-1-5Y.B. Tang, H.T. Cong*, Z.G.. Chen，H.M. Cheng, \
