Ultrastrong yet Ductile 2D Titanium Nanomaterial for On-Skin Conformal Triboelectric Sensing

作者：Park, Minhyuk; Yu, Qing; Wang, Qing; Chen, Chaojie; Zhang, Zhibo; Yang, Ziyin; Chen, Huan; Zeng, Qiaoshi; Zi, Yunlong; Fan, Jun^*; Yang, Yong^*

来源：Nano Letters, 2023, 23(12): 5802-5810.

DOI：10.1021/acs.nanolett.3c01776

• titanium
• 2D nanomaterial
• mechanical properties
• triboelectric sensing

Conventional titanium (e.g., bulk or thin films) is well-knownfor its relatively high mechanical strength, excellent corrosion resistance,and superior biocompatibility, which are suitable for biomedical engineeringand wearable devices. However, the strength of conventional titaniumoften trades off its ductility, and their use in wearable deviceshas not been explored yet. In this work, we fabricated a series oflarge-sized 2D titanium nanomaterials with the method of polymer surfacebuckling enabled exfoliation (PSBEE), which possess a unique heterogeneousnanostructure containing nanosized titanium, titanium oxide, and MXene-likephases. As a result, these 2D titaniums exhibit both superb mechanicalstrength (6-13 GPa) and remarkable ductility (25-35%)at room temperature, outperforming all other titanium-based materialsreported so far. More interestingly, we demonstrate that the 2D titaniumnanomaterials also showed good performance in triboelectric sensingand can be used to fabricate self-powered, on-skin conformal triboelectricsensors with good mechanical reliability.

• 单位
  上海大学; y