Pencil-on-paper strain sensor for flexible vertical interconnection
There has been an increasingly interest in the use of paper as inexpensive, foldable and disposable substrate material. In this paper, a novel pencil-on-paper strain sensor for flexible vertical interconnection is proposed. Graphite traces were used to fabricate the device. The strain changes would result in resistance changes depending on the graphite particles movement, thus, rotation strain can be detected. The sensor can also differentiate compressive and tensile signals. The proposed method presents a further expansion of fast and simple solution for realizing the full potential of paper substrate.
This work was supported by the Fundamental Research Funds for the Central Universities and National Natural Science Foundation of China (Grant no. 61674218, Grant no. 61731019). The author would like to thank the Animal Science Experimental Teaching Center of Zhejiang University for SEM characterization. The author would also like to thank the anonymous reviewer for the valuable judgment of this paper.
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