| Title | Tactile Sensing System Based on Arrays of Graphene Woven Microfabrics: Electromechanical Behavior and Electronic Skin Application |
| Authors | Yang, Tingting Wang, Wen Zhang, Hongze Li, Xinming Shi, Jidong He, Yijia Zheng, Quan-shui Li, Zhihong Zhu, Hongwei |
| Affiliation | Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China. Tsinghua Univ, Ctr Nano & Micro Mech, Beijing 100084, Peoples R China. Tsinghua Univ, Dept Engn Mech, Beijing 100084, Peoples R China. Peking Univ, Inst Microelect, Natl Key Lab Sci & Technol Micro Nano Fabricat, Beijing 100871, Peoples R China. Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China. |
| Keywords | graphene strain sensor e-skin interface crack woven fabrics PRESSURE SENSORS STRAIN SENSORS LARGE-AREA SENSITIVITY TRANSISTORS NETWORK FILMS |
| Issue Date | 2015 |
| Publisher | ACS NANO |
| Citation | ACS NANO.2015,9,(11),10867-10875. |
| Abstract | Nanomaterials serve as promising candidates for strain sensing due to unique electromechanical properties by appropriately assembling and tailoring their configurations. Through the crisscross interlacing of graphene microribbons in an over-and-under fashion, the obtained graphene woven fabric (GWF) indicates a good trade-off between sensitivity and stretchability compared with those in previous studies. In this work, the function of woven fabrics for highly sensitive strain sensing is investigated, although network configuration is always a strategy to retain resistance stability. The experimental and simulation results indicate that the ultrahigh mechanosensitivity with gauge factors of 500 under 2% strain is attributed to the macro-woven-fabric geometrical conformation of graphene, which induces a large interfacial resistance between the interlaced ribbons and the formation of microscale-controllable, locally oriented zigzag cracks near the crossover location, both of which have a synergistic effect on improving sensitivity. Meanwhile, the stretchability of the GWF could be tailored to as high as over 40% strain by adjusting graphene growth parameters and adopting oblique angle direction stretching simultaneously. We also demonstrate that sensors based on GWFs are applicable to human motion detection, sound signal acquisition, and spatially resolved monitoring of external stress distribution. |
| URI | http://hdl.handle.net/20.500.11897/417470 |
| ISSN | 1936-0851 |
| DOI | 10.1021/acsnano.5b03851 |
| Indexed | SCI(E) EI PubMed |
| Appears in Collections: | 信息科学技术学院 |
