[1] Northeastern Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China
[2] Univ Nevada, Howard R Hughes Coll Engn, Nevada Nanotechnol Ctr, Las Vegas, NV 89154 USA
[3] Univ Nevada, Dept Elect & Comp Engn, Las Vegas, NV 89154 USA