Ultrasensitive, Stretchable Strain Sensors Based on Fragmented Carbon Nanotube Papers

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• 作者：Jian ZhouHu Yu ; Xuezhu Xu ; Fei Han ; Gilles Lubineau
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2017
• 出版时间：February 8, 2017
• 年：2017
• 卷：9
• 期：5
• 页码：4835-4842
• 全文大小：616K
• ISSN：1944-8252

文摘

The development of strain sensors featuring both ultra high sensitivity and high stretchability is still a challenge. We demonstrate that strain sensors based on fragmented single-walled carbon nanotube (SWCNT) paper embedded in poly(dimethylsiloxane) (PDMS) can sustain their sensitivity even at very high strain levels (with a gauge factor of over 10⁷ at 50% strain). This record sensitivity is ascribed to the low initial electrical resistance (5–28 Ω) of the SWCNT paper and the wide change in resistance (up to 10⁶ Ω) governed by the percolated network of SWCNT in the cracked region. The sensor response remains nearly unchanged after 10 000 strain cycles at 20% proving the robustness of this technology. This fragmentation based sensing system brings opportunities to engineer highly sensitive stretchable sensors.