[1] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia
[2] Cent China Normal Univ, Coll Chem, Wuhan 430079, Hubei, Peoples R China
[3] Univ Wollongong, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2522, Australia
[4] Univ New S Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia