1. Advanced Materials Division Korea Research Institute of Chemical Technology Daejeon 34114 Republic of Korea
2. Sensors and Electron Devices Directorate CCDC Army Research Laboratory Adelphi MD 20783 USA
3. Department of Mechanical Engineering Seoul National University Seoul 08826 Republic of Korea
4. Department of Power Mechanical Engineering National Tsing Hua University Hsinchu City 30013 Taiwan
5. School of Mechanical Engineering Pusan National University Busan 46241 Republic of Korea
6. Institute of Advanced Machines and Design (IAMD) / Institute of Engineering Research Seoul National University Seoul 08826 Republic of Korea