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.
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14 August 2023
Research Article|
August 17 2023
Water-repellent and self-attachable flexible conductive patch
Special Collection:
Superhydrophobic Surfaces
Seongjin Park
;
Seongjin Park
(Conceptualization, Investigation, Methodology, Writing – original draft)
1
Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST)
, Ulsan 44919, Republic of Korea
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Jaeil Kim
;
Jaeil Kim
(Conceptualization, Methodology, Writing – original draft)
1
Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST)
, Ulsan 44919, Republic of Korea
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Sang-Hyeon Lee;
Sang-Hyeon Lee
(Conceptualization, Methodology)
1
Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST)
, Ulsan 44919, Republic of Korea
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Jinseo Kim
;
Jinseo Kim
(Investigation, Methodology)
1
Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST)
, Ulsan 44919, Republic of Korea
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Dong Kwan Kang
;
Dong Kwan Kang
(Investigation, Methodology)
1
Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST)
, Ulsan 44919, Republic of Korea
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Somi Kim
;
Somi Kim
(Investigation, Methodology)
1
Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST)
, Ulsan 44919, Republic of Korea
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Ho-Sup Jung
;
Ho-Sup Jung
a)
(Supervision, Writing – review & editing)
2
Department of Food Science and Biotechnology, Seoul National University
, Seoul 08826, Republic of Korea
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Hoon Eui Jeong
Hoon Eui Jeong
a)
(Conceptualization, Funding acquisition, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing)
1
Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST)
, Ulsan 44919, Republic of Korea
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Appl. Phys. Lett. 123, 071601 (2023)
Article history
Received:
May 31 2023
Accepted:
August 04 2023
Citation
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
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