Fabrication strategies that pursue “simplicity” for the production process and “functionality” for a device, in general, are mutually exclusive. Therefore, strategies that are less expensive, less equipment-intensive, and consequently, more accessible to researchers for the realization of omnipresent electronics are required. Here, this study presents a conceptually different approach that utilizes the inartificial design of the surface roughness of paper to realize a capacitive pressure sensor with high performance compared with sensors produced using costly microfabrication processes. This study utilizes a writing activity with a pencil and paper, which enables the construction of a fundamental capacitor that can be used as a flexible capacitive pressure sensor with high pressure sensitivity and short response time and that it can be inexpensively fabricated over large areas. Furthermore, the paper-based pressure sensors are integrated into a fully functional 3D touch-pad device, which is a step toward the realization of omnipresent electronics.
Bibliographical noteFunding Information:
K.L. and J.L. contributed equally to this work. This work was supported by the Small Grant for Exploratory Research (SGER) (NRF-2014R1A1A2A16055867); the Priority Research Centers Program (2009-0093823) through the National Research Foundation (NRF) of Korea; Midcareer Researcher Program through NRF grant funded by the MEST (2014R1A2A2A09053061); Yonsei University Future-leading Research Initiative of 2015 (2016-22-0062); National Research Foundation (NRF) of Korea Grant funded by the Korean Government (ERC-2015R1A5A1037668).
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All Science Journal Classification (ASJC) codes
- Materials Science(all)