篇題：Miniaturized Flexible Piezoresistive Pressure Sensors: Poly(3,4- ethylenedioxythiophene):Poly(styrenesulfonate) Copolymers Blended with Graphene Oxide for Biomedical Applications
文章出處：
ACS Applied Materials & Interfaces, vol. 11, no. 37, pp. 34305–34315, 18 Sept. 2019.
DOI: 10.1021/acsami.9b10575
作者： Jer-Chyi Wang*, Rajat Subhra Karmakar, Yu-Jen Lu, Shun-Hsiang Chan, Ming-Chung Wu, Kun-Ju Lin, Chin-Kuo Chen, Kuo-Chen Wei, and Yung-Hsin Hsu
任職單位及部門：長庚大學電子工程學系
Piezoresistive pressure sensors have garnered significant attention because of their wide applications in automobiles, intelligent buildings,
and biomedicine. For in vivo testing, the size of pressure sensors is a vital factor to monitor the pressure of specific portions of a human body.
Therefore, the primary focus of this study is to miniaturize piezoresistive pressure sensors with graphene oxide (GO)-incorporated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)
(PEDOT:PSS) composite films on a flexible substrate for biomedical applications. Prior to the fabrication of pressure sensors, a comprehensive material analysis was applied to
identify the horizontal placement of GO flakes within the PEDOT:PSS copolymers, revealing a reduction in variable range hopping distance and an enhancement in carrier mobility. For devices scaled to 0.2 cm,
the sensitivity of PEDOT:PSS pressure sensors was conspicuously decreased owing to the late response, which can be effectively solved by GO incorporation. Using technology computer-aided design simulations,
the current crowded at the PEDOT:PSS film surface and in the vicinity of an indium−tin−oxide electrode corner was found to be responsible for the changes in piezoresistive behaviors of the scaled devices.
The miniaturized flexible piezoresistive pressure sensors with PEDOT:PSS/GO composite films are capable of monitoring the brain pressure of intracranial surgery of a rat and discerning different styles of music for a potential application in hearing aids.
文章摘要：
壓阻式壓力傳感器由於在汽車，智能建築和生物醫學中的廣泛應用而備受關注。對於體內測試的應用，壓力傳感器的尺寸是監測人體特定部位壓力的非常重要因素。
因此，這項研究的主要重點是在生物醫學應用的柔性基板上，採用氧化石墨烯(GO)摻雜到聚(3,4-乙撐二氧噻吩):聚(苯乙烯磺酸鹽)(PEDOT:PSS)複合膜來使壓阻壓力傳感器微型化。
在製造壓力傳感器之前，進行了完整的材料分析以確定GO薄片在PEDOT:PSS共聚物中的水平放置，造成了可變範圍跳躍距離的減小以及載子遷移率的提高。對於尺寸為0.2公分的元件，
由於響應延遲效應的發生，PEDOT:PSS壓力傳感器的靈敏度顯著降低，這可以透過摻雜GO來有效解決。另外，我們使用TCAD模擬發現電流主要聚集在PEDOT：PSS膜表面以及銦錫氧化物電極角落附近，
這是微縮後的元件壓阻性能變差的原因。因此，具有PEDOT:PSS/GO複合膜的微型柔性壓阻式壓力傳感器能夠用來監視大鼠顱內手術的腦壓，並識別出不同風格的音樂，可應用在未來助聽器當中。
