Ultrasensitive and wide-range MXene/PDMS piezoresistive sensors inspired by rose petals

• Published in: Nano energy Vol. 131; p. 110285
• Main Authors: Chen, Jiangtao, Song, Tiancheng, Wang, Xinyi, Zhou, Yarong, Wang, Ting, Zhang, Xuqiang, Zhao, Yun, Yang, Bingjun, Zhang, Yi, Chen, Jianbiao, Chen, Kai, Li, Yan, Han, Weihua
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2024
• Subjects: Handwriting recognition; Hierarchical array structure; MXene; Piezoresistive sensor; Handwriting recognition; Piezoresistive sensor; Hierarchical array structure; MXene
• ISSN: 2211-2855
• DOI: 10.1016/j.nanoen.2024.110285

Flexible pressure sensors are crucial in a variety of applications, including artificial intelligence (AI), the Internet of Things (IoT), and electronic skin (e-Skin), due to their ability to convert mechanical stimuli into electrical signals. However, achieving both high sensitivity and a wide detection range simultaneously remains challenging, often limiting their practical applications. To address this, we designed a three-dimensional contact interface with Ti3C2 MXene/polydimethylsiloxane (MP) inspired by rose petals, which allows for significant strain and resistance changes across a broad range of stress levels. The innovative design significantly extends the pressure detection range (0.033–535 kPa), enhances pressure sensitivity (0.432 kPa−1), offers a fast response/recovery times (57/4 ms), and ensures exceptional long-term durability (up to 2950 cycles). The structured MP sensor demonstrates the capability to detect human physiological movements, distinguish various voices and map real-time pressure distributions. Notably, it achieves real-time tracking of handwriting processes with high recognition accuracy through a machine learning module. The work offers a new strategy and inspiration for designing and manufacturing innovative structured pressure sensors with reliable performance, paving the way for their application in next-generation wearable and portable electronics. [Display omitted] •A 3D hierarchical array structure inspired by natural rose petals is developed to construct MXene/PDMS piezoresistive sensor.•The innovative design significantly advances the detection range, effectively boosts sensitivity and realizes fast response.•The sensor realizes real-time tracking of handwriting with high recognition accuracy through a machine learning module.