[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea
[2] Elect & Telecommun Res Inst, Convergence Components & Mat Lab, Taejon 305700, South Korea
[3] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA
[4] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA