title: Sheath-Core Graphite/Silk Fiber Made by Dry-Meyer-Rod-Coating for Wearable Strain Sensors.
abstract: Recent years have witnessed the explosive development of flexible strain sensors. Nanomaterials have been widely utilized to fabricate flexible strain sensors, because of their high flexibility and electrical conductivity. However, the fabrication processes for nanomaterials and the subsequent strain sensors are generally complicated and are manufactured at high cost. In this work, we developed a facile dry-Meyer-rod-coating process to fabricate sheath-core-structured single-fiber strain sensors using ultrafine graphite flakes as the sheath and silk fibers as the core by virtue of their flexibility, high production, and low cost. The fabricated strain sensor exhibits a high sensitivity with a gauge factor of 14.5 within wide workable strain range up to 15%, and outstanding stability (up to 3000 cycles). The single-fiber-based strain sensors could be attached to a human body to detect joint motions or easily integrated into the multidirectional strain sensor for monitoring multiaxial strain, showing great potential applications as wearable strain sensors.
authors.affiliation: Department of Chemistry and Center for Nano and Micro Mechanics (CNMM), Tsinghua University , Beijing 100084, People's Republic of China.
authors.forename: Mingchao
authors.initials: M
authors.lastname: Zhang
authors.affiliation: Department of Chemistry and Center for Nano and Micro Mechanics (CNMM), Tsinghua University , Beijing 100084, People's Republic of China.
authors.forename: Chunya
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Chemistry and Center for Nano and Micro Mechanics (CNMM), Tsinghua University , Beijing 100084, People's Republic of China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Department of Chemistry and Center for Nano and Micro Mechanics (CNMM), Tsinghua University , Beijing 100084, People's Republic of China.
authors.forename: Muqiang
authors.initials: M
authors.lastname: Jian
authors.affiliation: Department of Chemistry and Center for Nano and Micro Mechanics (CNMM), Tsinghua University , Beijing 100084, People's Republic of China.
authors.forename: Yingying
authors.initials: Y
authors.lastname: Zhang
keywords: dry-Meyer-rod-coating; flexible electronics; graphite flakes; sheath-core structure; silk fiber; strain sensor