Entropy-Assisted Flexible Nanofibrous Dielectrics Enable High-performance Strain Sensing

TY - JOUR

T1 - Entropy-Assisted Flexible Nanofibrous Dielectrics Enable High-performance Strain Sensing

AU - Dou, Lvye

AU - Pu, Xianglei

AU - Yang, Bingbing

AU - Zhang, Chi

AU - Zhang, Yujun

AU - Xu, Wei

AU - Li, Lei

AU - Li, Jianqiang

AU - Wu, Hui

AU - Nan, Ce Wen

AU - Lin, Yuan Hua

N1 - Publisher Copyright: © 2025 Wiley-VCH GmbH.

PY - 2026/1/5

Y1 - 2026/1/5

N2 - Ceramics possess notable attributes including high-temperature stability, strong chemical tolerance, and exceptional wear resistance, rendering them highly promising for various applications. Nevertheless, the brittleness of ceramics presents a substantial hurdle in harnessing their full potential for applications in wearable devices and unconfined loading environments. In this study, an entropy-assisted strategy is proposed to realize the flexibility of Bi4Ti3O12-based dielectric nanofibers. The findings illustrate that augmented atomic configurational entropy within the nanofibers instigates favorable structural changes, including the development of refined grains and a substantial amorphous component, thereby leading to the notable improvement in the flexibility of ceramic nanofibers with functional properties. The flexible high-entropy nanofibers enable the development of a high-performance capacitive strain sensor with remarkable response sensitivity (1.62 kPa−1), wide temperature range adaptability over 25–350 °C, and excellent fatigue resistance over 3000 cycles. Importantly, this entropy-driven approach holds promise for the advancement of flexible functional ceramics, extending beyond simple oxides such as amorphous silica and alumina.

AB - Ceramics possess notable attributes including high-temperature stability, strong chemical tolerance, and exceptional wear resistance, rendering them highly promising for various applications. Nevertheless, the brittleness of ceramics presents a substantial hurdle in harnessing their full potential for applications in wearable devices and unconfined loading environments. In this study, an entropy-assisted strategy is proposed to realize the flexibility of Bi4Ti3O12-based dielectric nanofibers. The findings illustrate that augmented atomic configurational entropy within the nanofibers instigates favorable structural changes, including the development of refined grains and a substantial amorphous component, thereby leading to the notable improvement in the flexibility of ceramic nanofibers with functional properties. The flexible high-entropy nanofibers enable the development of a high-performance capacitive strain sensor with remarkable response sensitivity (1.62 kPa−1), wide temperature range adaptability over 25–350 °C, and excellent fatigue resistance over 3000 cycles. Importantly, this entropy-driven approach holds promise for the advancement of flexible functional ceramics, extending beyond simple oxides such as amorphous silica and alumina.

KW - brittle-to-flexible

KW - dielectric nanofibers

KW - entropy engineering

KW - strain sensor

UR - https://www.scopus.com/pages/publications/105010697005

U2 - 10.1002/adfm.202507617

DO - 10.1002/adfm.202507617

M3 - Article

AN - SCOPUS:105010697005

SN - 1616-301X

VL - 36

JO - Advanced Functional Materials

JF - Advanced Functional Materials

IS - 2

M1 - e07617

ER -