Achieving exceptional water-repellency and reliable reversible adhesion is crucial for the development of wearable flexible electronics. However, simultaneously achieving these properties presents a significant challenge, as water-repellency requires maximizing the presence of air while robust adhesion necessitates enhancing the solid fraction. In this study, we present a flexible and transparent conductive patch that addresses this challenge by offering simultaneous robust superhydrophobicity and strong adhesion in both dry and wet conditions. The device incorporates a unique combination of overhang micropillars, microgrids and a percolating network of carbon nanotubes. The proposed patch demonstrates outstanding water repellency with a contact angle exceeding 150°, while delivering impressive dry adhesion (>200 kPa) and wet adhesion (>150 kPa) performance. Furthermore, the device exhibits tunable electrical conductivity and optical transmittance.
Water-repellent and self-attachable flexible conductive patch
Seongjin Park, Jaeil Kim, Sang-Hyeon Lee, Jinseo Kim, Dong Kwan Kang, Somi Kim, Ho-Sup Jung, Hoon Eui Jeong; Water-repellent and self-attachable flexible conductive patch. Appl. Phys. Lett. 14 August 2023; 123 (7): 071601. https://doi.org/10.1063/5.0160217
Download citation file: