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Strain-Insensitive Stretchable Fiber Conductors Based on Highly Conductive Buckled Shells for Wearable Electronics

Strain-Insensitive Stretchable Fiber Conductors Based on Highly Conductive Buckled Shells for Wearable Electronics
Yoon, KukroLee, SanghyeonShim, DonghunLee, MinkyuCho, SungjoonKwon, ChaebeenWon, ChihyeongLee, SeungminLee, JinhanJung, Han HeeJang, Kyung-InLee, JaehongLee, Taeyoon
Issued Date
ACS Applied Materials & Interfaces, v.15, no.14, pp.18281 - 18289
Author Keywords
stretchable fiber conductorsstrain insensitivitybuckled structurewearable electronicspH sensor
Based on their high applicability to wearable electronics, fiber-based stretchable electronics have been developed via different strategies. However, the electrical conductivity of a fiber electrode is severely degraded, following deformation upon stretching. Despite the introduction of conductive buckled structures to resolve this issue, there still exist limitations regarding the simultaneous realizations of high conductivity and stretchability. Here, we exploit the dense distribution of the Ag nanoparticle (AgNP) network in polyurethane (PU) to fabricate a strain-insensitive stretchable fiber conductor comprising highly conductive buckled shells via a facile chemical process. These buckled AgNPs/PU fibers exhibit stable and reliable electrical responses across a wide range (tensile strain = ∼200%), in addition to their high electrical conductivity (26,128 S/m) and quality factor (Q = 2.29). Particularly, the negligible electrical hysteresis and excellent durability (>10,000 stretching-releasing cycles) of the fibers demonstrate their high applicability to wearable electronics. Furthermore, we develop buckled fiber-based pH sensors exhibiting stable, repeatable, and highly distinguishable responses (changing pH is from 4 to 8, response time is 5-6 s) even under 100% tensile strain. The buckled AgNPs/PU fibers represent a facile strategy for maintaining the stable electrical performances of fiber electrodes across the strain range of human motion for wearable applications. © 2023 American Chemical Society.
American Chemical Society
Related Researcher
  • 장경인 Jang, Kyung-In 로봇및기계전자공학과
  • Research Interests Extreme mechanics; Stand-alone electronics; Heterogeneous materials; Biocompatible interfaces
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Appears in Collections:
Department of Robotics and Mechatronics Engineering Soft Biomedical Devices Lab 1. Journal Articles
Department of Robotics and Mechatronics Engineering Bio-integrated Electronics Lab 1. Journal Articles


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