About the Authors

Ken Okada

okadak@mls.eng.osaka-u.ac.jp

Affiliation Department of Material and Life Science, Graduate School of Engineering, Osaka University, Osaka, Japan

Clement Angkawidjaja

Affiliation Department of Material and Life Science, Graduate School of Engineering, Osaka University, Osaka, Japan

Yuichi Koga

Affiliation Department of Material and Life Science, Graduate School of Engineering, Osaka University, Osaka, Japan

Kazufumi Takano

Affiliations Department of Material and Life Science, Graduate School of Engineering, Osaka University, Osaka, Japan, Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Osaka, Japan

Shigenori Kanaya

Affiliation Department of Material and Life Science, Graduate School of Engineering, Osaka University, Osaka, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KO. Performed the experiments: KO. Analyzed the data: KO CA. Contributed reagents/materials/analysis tools: YK KT SK. Wrote the paper: KO SK. Helped in interpretation of data and discussion of results: YK KT SK. Reviewed the manuscript: KO CA YK KT SK.