a
Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
b
International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
c
Japan Science and Technology Agency (JST), ERATO Takahara Soft Interface Project, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
E-mail: takahara@cstf.kyushu-u.ac.jp
;
Fax: +81-92-802-2518
;
Tel: +81-92-802-2517