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標題: | 溶液老化對奈米碳管/聚 (3,4-乙烯二氧噻吩) 聚苯乙烯磺酸之溫度靈敏度影響 Solution Aging Effect on Temperature Sensitivity of CNT/PEDOT:PSS |
作者: | 蔡定緯 Ting-Wei Tsai |
指導教授: | 陳建彰 Jian-Zhang Chen |
關鍵字: | 奈米碳管(CNT),聚 (3,4-乙烯二氧噻吩) 聚苯乙烯磺酸 (PEDOT:PSS),電阻溫度係數,熱指標,溶液老化, carbon nanotube (CNT),poly(3,4- ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS),temperature coefficient of resistance (TCR),thermal index (TI),aging, |
出版年 : | 2023 |
學位: | 碩士 |
摘要: | 本研究以奈米碳管 (CNT)/ 聚 (3,4-乙烯二氧噻吩) 聚苯乙烯磺酸 (PEDOT:PSS)製作不同比例的溫度感測層混合溶液(CNT/PEDOT:PSS 1/5, 1/9, 1/13)滴定於PDMS基板和奈米銀線電極上並烤乾,製作可撓性溫度感測器。經銅膠電極連接並使用線性掃描伏安法(LSV)及熱電偶溫度計量測電阻溫度係數(TCR)及熱指標(TI),證實1/5、1/9、1/13三種比例的混合溶液經過長時間的老化0、3、6天後TCR由-1.97、-1.99、-2.15 (%/°C)改善至-2.80、-2.61、-2.51 (%/°C);TI也由2242.5、2249.1、2503.8 (K)增加至3530.1、3085.7、3002.5 (K)。使用X射線光電子能譜(XPS)分析可知,混合薄膜隨著老化時間的增加PSS-H鍵逐漸轉換為PSS-Na鍵,也就是PEDOT:PSS被去摻雜,透過自製的賽貝克係數量測平台量測薄膜的賽貝克係數,薄膜的賽貝克係數由52.4增加至114.5 μV K−1同樣說明了去摻雜現象的產生。因此本實驗提出一種簡便的溶液老化製程,能夠大幅增加CNT/PEDOTPSS溫度感測器的溫度靈敏度及賽貝克係數,應用於34-42°C下小範圍高精度的人體溫度量測。 In this study, flexible temperature sensors were fabricated using a mixture of carbon nanotubes (CNT) and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) at different ratios (CNT/PEDOT:PSS 1/5, 1/9, 1/13). The mixture solution was drop-cast onto PDMS substrates with silver nano wires (AgNWs) electrodes and dried. The temperature coefficient of resistance (TCR) and thermal index (TI) were measured using linear sweep voltammetry (LSV) and a thermocouple thermometer. The results showed that after aging for 0, 3, and 6 days, the absolute value of TCR increased from 1.97, 1.99, 2.15 (%/°C) to 2.80, 2.61, 2.51 (%/°C) for the 1/5, 1/9, and 1/13 ratios, respectively. The TI values increased from 2242.5, 2249.1, 2503.8 (K) to 3530.1, 3085.7, 3002.5 (K) for the corresponding ratios. X-ray photoelectron spectroscopy (XPS) analysis revealed that with increasing aging time, the PSS-H bonds in the mixed films gradually transformed into PSS-Na bonds, indicating the dedoping of PEDOT:PSS. The Seebeck coefficient of the films, measured using a homemade Seebeck coefficient measurement platform, increased from 52.4 to 114.5 μV K−1, further confirming the dedoping treatment. Therefore, this study presents a facile aging process that significantly enhances the temperature sensitivity and Seebeck coefficient of CNT/PEDOT:PSS temperature sensors, making them suitable for high-precision human body temperature measurements within a small range of 34-42°C. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/88320 |
DOI: | 10.6342/NTU202301308 |
全文授權: | 同意授權(全球公開) |
顯示於系所單位: | 應用力學研究所 |
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