1. Pencil-trace on printed silver interdigitated electrodes for paper-based NO2 gas sensors
- Author
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Lu Chen, Leo Shen, Jiankun Zhang, Lei Huang, Youjie Lin, Qi Chen, Ziyan Zeng, and Wangzhou Shi
- Subjects
Rapid prototyping ,Materials science ,Physics and Astronomy (miscellaneous) ,Graphene ,Nanoparticle ,Nanotechnology ,Paper based ,engineering.material ,Pencil (optics) ,law.invention ,Coating ,Nanosensor ,law ,engineering ,Interdigitated electrode - Abstract
The pencil-drawn sensor is expected to enable a simple, low-cost, and reproducible paper-based sensor platform for widely deployed wireless environmental monitoring of NO2. Herein, we demonstrated a rapid prototyping of chemiresistor-type NO2 sensor by mechanical abrasion of an 8B pencil to form a stripe of uniform graphitic coating on printed silver interdigitated electrodes (IDEs). The Ag IDEs not only offer a low resistance but also provide the assembly of Ag nanoparticles into exfoliated graphene sheets for the paper-based NO2 gas sensors in order to realise much higher sensitivity and better reproducibility comparing with pencil-drawn sensors directly on weighing paper.
- Published
- 2015