Lin Cheng-Wei, Zhao Zhibo, Kim Jaemyung, Huang Jiaxing
1] Department of Materials Science and Engineering, Northwestern University 2220 Campus Drive, Evanston, IL, 60208, USA [2].
Department of Materials Science and Engineering, Northwestern University 2220 Campus Drive, Evanston, IL, 60208, USA.
Sci Rep. 2014 Jan 22;4:3812. doi: 10.1038/srep03812.
Pencil traces drawn on print papers are shown to function as strain gauges and chemiresistors. Regular graphite/clay pencils can leave traces composed of percolated networks of fine graphite powders, which exhibit reversible resistance changes upon compressive or tensile deflections. Flexible toy pencils can leave traces that are essentially thin films of graphite/polymer composites, which show reversible changes in resistance upon exposure to volatile organic compounds due to absorption/desorption induced swelling/recovery of the polymer binders. Pencil-on-paper devices are low-cost, extremely simple and rapid to fabricate. They are light, flexible, portable, disposable, and do not generate potentially negative environmental impact during processing and device fabrication. One can envision many other types of pencil drawn paper electronic devices that can take on a great variety of form factors. Hand drawn devices could be useful in resource-limited or emergency situations. They could also lead to new applications integrating art and electronics.
打印纸上绘制的铅笔痕迹被证明可作为应变仪和化学电阻器。普通的石墨/粘土铅笔能留下由精细石墨粉末的渗滤网络组成的痕迹，这些痕迹在压缩或拉伸变形时会呈现可逆的电阻变化。柔性玩具铅笔能留下本质上是石墨/聚合物复合材料薄膜的痕迹，由于聚合物粘合剂的吸收/解吸引起的膨胀/恢复，这些痕迹在暴露于挥发性有机化合物时会显示出可逆的电阻变化。纸上铅笔装置成本低、极其简单且制造迅速。它们轻便、灵活、便携、一次性使用，并且在加工和器件制造过程中不会产生潜在的负面环境影响。人们可以设想许多其他类型的铅笔绘制纸电子器件，它们可以呈现出各种各样的外形。手绘器件在资源有限或紧急情况下可能会很有用。它们还可能带来将艺术与电子学相结合的新应用。
