Direct Patterning of Carbon Nanotube via Stamp Contact Printing Process for Stretchable and Sensitive Sensing Devices

Binghao Liang,Wenjun Chen,Zikang Tang,Leilei Yang,Rongliang Yang,Hai Zhu,Dongwei Lu,Zian Zhang,Xuchun Gui

doi:10.1007/s40820-019-0323-8

Binghao Liang, Wenjun Chen + Show 7 more

Open Access

https://doi.org/10.1007/s40820-019-0323-8

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Journal: Nano-Micro Letters	Publication Date: Oct 23, 2019
Citations: 59	License type: open-access

Affiliation: Sun Yat-sen University, University of Macau

Abstract

HighlightsA dry transfer method for the mass production of transparent conductive carbon nanotube (CNT) films inspired by typography has been proposed.The strain sensors based on the CNT films have high stretchability and repeatability (gauge factor up to 9960 at 85% strain).These ultrathin strain sensors can detect human motion, sound, and pulse, suggesting promising application prospects in wearable devices.

Highlights

Flexible electronic devices have a wide range of needs and attracted tremendous attention in wearable electronics, soft robots and implantable medical devices [1,2,3,4,5]
The carbon nanotube (CNT) seals were synthesized by chemical vapor deposition (CVD) method using ferrocene and 1,2-dichlorobenzene as the catalyst precursor and carbon source, as reported in our previous work [35]
Due to the thickness of CNT can be adjusted by controlling the transfer pressure or transfer times (Fig. S7), the sensitivity of the strain sensor can be improved by increasing the transfer pressure or repeating the dry transfer process

Summary

Introduction

Flexible electronic devices have a wide range of needs and attracted tremendous attention in wearable electronics, soft robots and implantable medical devices [1,2,3,4,5]. A high-efficiency, eco-friendly, and low-cost method for fabricating strain sensors with excellent performance has not been explored, especially for the sensors with high sensitivity and stretchability. We proposed a simple, low-cost, environmentally friendly stamp contact printing method for the mass production of transparent conductive carbon nanotube (CNT) film. Inspired by stamp, a versatile stamp contact printing technology to prepare transparent CNT film on polymer substrate was developed. In this stamping method, a porous CNT block was used as both the seal and the solid ink. To excavate the potential application of our sensors, pulse detection, motion monitoring, and voice recognition are demonstrated

Fabrication of CNT Film and Strain Sensor

Device Characterization

Findings

Result and Discussion

Conclusions