[1] Natl Inst Mat Sci, World Premier Int WPI Res Ctr Mat Nanoarchitecton, Tsukuba, Ibaraki 3050044, Japan
[2] Japan Sci & Technol Agcy JST, Tsukuba, Ibaraki 3050044, Japan
[3] Texas A&M Univ, Dept Biomed Engn, Zachry Engn Ctr 337, College Stn, TX 77843 USA
[4] Texas A&M Univ, Mat Sci & Engn Program, Zachry Engn Ctr 337, College Stn, TX 77843 USA
[5] Louisiana Tech Univ, Inst Micromfg, Ruston, LA 71272 USA
[6] Univ Queensland, AIBN, Brisbane, Qld 4072, Australia