Do something that really works and is useful !
Yi-Fei (Ethan) Wang, Ph.D
Project Asst. Prof @ Yamagata University
Email: dr.wangyf [at] hotmail (dot) com
Google Scholar / Lab Page / Linkedin
I am currently a Project Assistant Professor at Innovation Center for Organic Electronics (INOEL) of Yamagata University with Prof. Shizuo Tokito and Prof. Daisuke Kumaki.

Research Focuses
NEWs
2024. 7. 15 A paper titled 'Facile printing of liquid-metal-based stretchable conductor using EGaIn/Ga2O3 composite' has been published by Flexible Printed Electronics (IF: 3.1).
2024. 06. 19 I delivered a talk titled ' Fully Printed Soft Mechanical Sensors Using Self-Segregated Porous Conductive Composites ' at the M&BE 11th in Matsue, Japan.
2024. 06. 19 I delivered a talk titled ' Facile printing of liquid-metal-based stretchable conductor using
EGaIn/Ga2O3 composite' at the JSAP 2024 Spring Meeting in Tokyo, Japan.
2023. 9. 19 I delivered a talk at the JSAP Autumn conference in Kumamoto, Kyushu, Japan.
2023. 7. 12 A paper entitled "Printed Bilayer Liquid Metal Soft Sensors for Strain and Tactile Perception in Soft Robotics" has been published by Advanced Materials Technologies.
2023. 5. 25 A paper entitled "Printed Directional Bending Sensor with High Sensitivity and Low Hysteresis for Human Motion Detection and Soft Robotic Perception” has been published by Sensors .
2023. 2. 28 I got the Grant-in-Aid for Early-Career Scientists from Japan Society for the Promotion of Science (JSPS).
Selected Publications
Takeru Kaneko, Yi-Fei Wang *, Mayuka Hori, Tomohito Sekine, Ayako Yoshida, Yasunori Takeda, Daisuke Kumaki, Shizuo Tokito *. “Printed Bilayer Liquid Metal Soft Sensors for Strain and Tactile Perception in Soft Robotics” Adv. Mater. Technol., 2300436 (2023).
Ayako Yoshida, Yi-Fei Wang *, Tomohito Sekine, Yasunori Takeda, Daisuke Kumaki, Shizuo Tokito *. “Printed Low-Hysteresis Stretchable Strain Sensor Based on a Self-Segregating Conductive Composite” ACS Appl. Eng. Mater, 1, 50-58 (2023).
Shogo Tachibana, Yi-Fei Wang *, Tomohito Sekine, Yasunori Takeda, Jinseo Hong, Ayako Yoshida, Daisuke Kumaki, Takeo Shiba, Shizuo Tokito *. “A Printed Flexible Humidity Sensor with High Sensitivity and Fast Response Using a Cellulose Nanofiber/Carbon Black Composite” ACS Appl. Mater. Interfaces, 14, 5721-5728 (2022).
Yi‐Fei Wang *, Tomohito Sekine, Yasunori Takeda, Jinseo Hong, Ayako Yoshida, Daisuke Kumaki, Takeo Shiba, Shizuo Tokito *. “Deep Eutectic Solvent Induced Porous Conductive Composite for Fully Printed Piezoresistive Pressure Sensor” Adv. Mater. Technol., 6, 2100731 (2021).
Yi-Fei Wang *, Tomohito Sekine, Yasunori Takeda, Jinseo Hong, Ayako Yoshida, Hiroyuki Matsui, Daisuke Kumaki, Takao Nishikawa, Takeo Shiba, Tadahiro Sunaga, Shizuo Tokito*. “Printed Strain Sensor with High Sensitivity and Wide Working Range Using a Novel Brittle-Stretchable Conductive Network” ACS Appl. Mater. Interfaces, 12, 35282-35290 (2020).
Yi-Fei Wang *, Tomohito Sekine, Yasunori Takeda, Koji Yokosawa, Hiroyuki Matsui, Daisuke Kumaki, Takeo Shiba, Takao Nishikawa, Shizuo Tokito *. “Fully Printed PEDOT: PSS-based Temperature Sensor with High Humidity Stability for Wireless Healthcare Monitoring.” Scientific Reports, 10, 2467 (2020).
Yi-Fei Wang, Hiroaki Iino, Jun-ichi Hanna *. “Fabrication of planarly-oriented polycrystalline thin films of smectic liquid crystalline organic semiconductors” Soft Matter, 13, 6499-6505 (2017).
Yi-Fei Wang, Hiroaki Iino, Jun-ichi Hanna *. “Solution processed nanogap organic diode based on liquid crystal materials” Applied Physics Letter, 111, 133301 (2017).
Yi-Fei Wang, Chun-Xiu Zhang *, Hao Wu, Ao Zhang, Jian-Chuang Wang, Shuai-Feng Zhang, Jia-Ling Pu. “Modulation of phase behaviors and charge carrier mobilities by linkage length in discotic liquid crystal dimers” Soft Matter, 11, 712-718 (2015).
Yifei Wang, Chunxiu Zhang *, Hao Wu, Jialing Pu. “Synthesis and mesomorphism of triphenylene-based dimers with highly ordered columnar plastic phase” Journal of Materials Chemistry C, 2, 1667-1674 (2014).