探討P(VDF-TrFE-CTFE)固/液體介面效應的影響

Study of Solid/ Liquid Interface Effect on P(VDF-TrFE-CTFE)

陳嘉漢(Kenrick Chin Kar Han)

指導教授 ： 林致廷

國立臺灣大學/電機資訊學院/電子工程學研究所/碩士(2019年)

https://doi.org/10.6342/NTU201904455

摘要

定點照護檢驗系統(POCT)是下一代醫療保健系統的未來趨勢之一。因此，為定點照護檢驗系統開發的感測器應具有低成本，快速，方便使用，可攜帶和易於製造的特點。由於可攜帶和方便使用的目的，可繞式電化學感測器已經成為一個受矚目的發展方向。 在可繞式電化學感測器發展的各個方面中，固/液介面是其中一個應該著重探討的特性。為了探索固/液介面特性，本研究中使用了基於聚偏氟乙烯-三氟乙烯-三氟氯乙烯P（VDF-TrFE-CTFE）的電解質-絕緣體-半導體結構。實驗結果表明，P（VDF-TrFE-CTFE）EIS感測器存在漂移和磁滯現象，pH響應信號已被漂移反應所覆蓋。漂移和磁滯現象可歸因於電化學充電效應。 這可以解釋為當感測器與溶液接觸時，P（VDF-TrFE-CTFE）反應區與溶液中的陽離子進行質子化反應。此外，我們還研究了暴露時間，陽離子類型，離子濃度對磁滯現象的影響。 基於這項研究，評估材料反應區處於固/液介面狀態下的特性對於感測器應用上尤為重要。

關鍵字

聚偏氟乙烯-三氟乙烯-三氟氯乙烯（P(VDF-TrFE-CTFE)) ； 電化學充電效應 ； 磁滯現象 ； 反應區

並列摘要

Point-of-Care Testing (POCT) is one of the future trends in the next-generation healthcare system. Therefore, sensors developed for POCT should have characteristics of low-cost, rapid, user-friendly, portable and ease of fabrication. Due to the portable and user-friendly purposes, the flexible electrochemical sensor has become an interesting direction. In various aspects flexible electrochemical sensor development, solid/liquid interfaces are one of the important characteristics to be understood. To explore the solid/liquid interfaces in this study, P(VDF-TrFE-CTFE) based Electrolyte-Insulator-Semiconductor structure is used. The experiment results show that the P(VDF-TrFE-CTFE) EIS sensor existing drift and hysteresis phenomenon and the pH response signal has been covered by the drift. The drift and hysteresis phenomenon may be attributed to the electrochemical charging effect. This can be explained as the P(VDF-TrFE-CTFE) reaction sites having protonation by reacting with the cations in the exposure solution. In addition, we also investigated the exposed time, cation type, ion concentration effects on the hysteresis phenomenon. Based on this work, it is important to evaluate the material reaction-site characteristics at the solid/solution interface for sensor applications.

並列關鍵字

P(VDF-TrFE-CTFE) ； electrochemical charging effect ； hysteresis phenomenon ； reaction sites

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