Interfacial Capillary Spooling of Conductive Polyurethane-Silver Core-Sheath (PU@Ag) Microfibers for Highly Stretchable Interconnects
- Authors
- Son, Hyo Jung; Kim, Hae-Jin; Jeong, Seongsik; Ahn, Yooseong; Yang, Hoichang; Park, Minwoo
- Issue Date
- May-2023
- Publisher
- AMER CHEMICAL SOC
- Keywords
- stretchable interconnects; core-sheath fibers; capillary force; droplet-fiber interface; in-drop spooling
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.15, no.18, pp 22574 - 22579
- Pages
- 6
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 15
- Number
- 18
- Start Page
- 22574
- End Page
- 22579
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/151877
- DOI
- 10.1021/acsami.3c03309
- ISSN
- 1944-8244
1944-8252
- Abstract
- Conductive fibers are core materials in textile electronics for the sustainable operation of devices under mechanical stimuli. Conventional polymer-metal core-sheath fibers were employed as stretchable electrical interconnects. However, their electrical conductivity is severely degraded by the rupture of metal sheaths at low strains. Because the core-sheath fibers are not intrinsically stretchable, designing a stretchable architecture of interconnects based on the fibers is essential. Herein, we introduce nonvolatile droplet-conductive microfiber arrays as stretchable interconnects by employing interfacial capillary spooling, motivated by the reversible spooling of capture threads in a spider web. Polyurethane (PU)-Ag core-sheath (PU@Ag) fibers were prepared by wet-spinning and thermal evaporation. When the fiber was placed on a silicone droplet, a capillary force was generated at their interface. The highly soft PU@ Ag fibers were fully spooled within the droplet and reversibly uncoiled when a tensile force was applied. Without mechanical failures of the Ag sheaths, an excellent conductivity of 3.9 x 104 S cm-1 was retained at a strain of 1200% for 1000 spooling-uncoiling cycles. A light-emitting diode connected to a multiarray of droplet-PU@Ag fibers exhibited stable operation during spooling- uncoiling cycles.
- Files in This Item
-
Go to Link
- Appears in
Collections - 공과대학 > 화공생명공학부 > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.