A wearable and highly sensitive pressure sensor with ultrathin gold nanowires

Shu Gong, Willem Schwalb, Yongwei Wang, Yi Chen, Yue Tang, Jye Si, Bijan Shirinzadeh and Wenlong Cheng ()
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Shu Gong: Monash University
Willem Schwalb: Mechanical and Aerospace Engineering, Faculty of Engineering, Monash University
Yongwei Wang: Monash University
Yi Chen: Monash University
Yue Tang: Monash University
Jye Si: Monash University
Bijan Shirinzadeh: Mechanical and Aerospace Engineering, Faculty of Engineering, Monash University
Wenlong Cheng: Monash University

Nature Communications, 2014, vol. 5, issue 1, 1-8

Abstract: Abstract Ultrathin gold nanowires are mechanically flexible yet robust, which are novel building blocks with potential applications in future wearable optoelectronic devices. Here we report an efficient, low-cost fabrication strategy to construct a highly sensitive, flexible pressure sensor by sandwiching ultrathin gold nanowire-impregnated tissue paper between two thin polydimethylsiloxane sheets. The entire device fabrication process is scalable, enabling facile large-area integration and patterning for mapping spatial pressure distribution. Our gold nanowires-based pressure sensors can be operated at a battery voltage of 1.5 V with low energy consumption ( 1.14 kPa−1) and high stability (>50,000 loading–unloading cycles). In addition, our sensor can resolve pressing, bending, torsional forces and acoustic vibrations. The superior sensing properties in conjunction with mechanical flexibility and robustness enabled real-time monitoring of blood pulses as well as detection of small vibration forces from music.

Date: 2014
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DOI: 10.1038/ncomms4132

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