Son, Wonkyeong Lee, Jae Myeong Choi, Jin Hyeong Kim, Juwan Noh, Junho Oh, Myoungeun Sim, Hyeon Jun Jeong, Chang Kyu Chun, Sungwoo Kim, Seon Jeong Choi, Changsoon 2024-04-24T07:35:28Z 2024-04-24T07:35:28Z 2024-03-21 2024-07 1616-301X https://pubs.kist.re.kr/handle/201004/149696 Soft and elastic fiber-based electronic devices exhibiting high electromechanical stability are highly desirable for sustainable and continuous utilization in various applications. However, effectively assembling the cathode and anode in a single body without unwanted interconnections and realizing an intimate contact interface between the electrode and substrate remain challenging. Here, an electrical shortage-free one-body fiber system with double-helix buckle electrodes created by torsion- and strain-mismatch between carbon nanotube (CNT) ribbons and a rubber substrate is reported. The as-used CNT ribbons serve as the strain-insensitive electrode, while the rubber mandrel-core fiber acts as the key matrix in the following three aspects: as an elastic substrate that ensures reversible structural changes during mechanical deformations; as a dielectric layer for capacitive strain sensing; and as an electrothermal expansion element for tensile contraction. Moreover, because of the mismatch-induced torque-balance structure, the helically wrapped CNT buckle electrodes can effectively absorb the applied stresses without noticeable delamination and electrical conductance loss. Consequently, the double-helix buckle fiber system can reliably provide multiple functions, viz. detection of various deformations (e.g., stretching, twisting, and pressing), electrochemical energy storage with excellent strain tolerance, and reversible electrothermal tensile actuation. A double-helix buckle (DHB)-based one-body fiber system is prepared by torsion- and strain-mismatch between carbon nanotube ribbons and a rubber substrate. The torque-balance structure and resultant intimate interface contact between the electrode and the mandrel-core are critical in withstanding the applied stress without an electrical short circuit. Consequently, the DHB fiber system can reliably provide multiple functions under various deformations. image English John Wiley & Sons Ltd. Double-Helical Carbon Nanotube-Wrapped Elastomeric Mandrel for Electrical Shortage-Free, One-Body Multifunctional Fiber Systems Article 10.1002/adfm.202312033 1 Advanced Functional Materials, v.34, no.30 Advanced Functional Materials 34 30 N scie scopus 001181552000001 2-s2.0-85187155253 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article WEARABLE ELECTRONICS SUPERCAPACITORS SENSORS STROKE ARRAYS carbon nanotube buckles double-helix electrodes elastomeric mandrel multifunctionalities one-body systems