論文雑誌「Advanced Functional Materials 」のカバーピクチャーを制作しました［北海道大学］

Solid-State Electrochemical Thermal Transistors (Adv. Funct. Mater. 19/2023)
Qian Yang, Hai Jun Cho, Zhiping Bian, Mitsuki Yoshimura, Joonhyuk Lee, Hyoungjeen Jeen, Jinghuang Lin, Jiake Wei, Bin Feng, Yuichi Ikuhara, Hiromichi Ohta

In article number 2214939, Hiromichi Ohta and co-workers demonstrate solid-state thermal transistors that control the thermal conductivity (κ) of strontium cobaltite by electrochemical redox treatment. Oxidized SrCoO₃ shows a higher κ of 3.8 W m⁻¹ K⁻¹ while reduced SrCoO₂ shows a lower κ of 0.95 W m⁻¹ K⁻¹. The on/off ratio is 4, and it plays like the shutter of heat flow.