1. Research Center for Organic Electronics (ROEL) Graduate School of Science and Engineering Yamagata University 3-4-16, Jonan Yonezawa Yamagata 992-8510 Japan
2. Department of Robotics Ritsumeikan University 1-1-1 Noji-higashi Kusatsu Shiga 525-8577 Japan
3. Piezotech S. A. S. Arkema-CRRA Rue Henri Moissan Pierre-Benite Cedex 63493 France
4. Arkema Kyoto Technical Center 93, Chudoji, Awatacho Shimogyo-ku Kyoto 600-8815 Japan