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系統識別號 U0026-1102201003254900
論文名稱(中文) 含磺酸根癸烷硫醇自組裝單分子膜之研究
論文名稱(英文) Studies of Self-Assembled Monolayers of 10-Mecaptodecanesulfonic Acid
校院名稱 成功大學
系所名稱(中) 化學工程學系碩博士班
系所名稱(英) Department of Chemical Engineering
學年度 98
學期 1
出版年 99
研究生(中文) 彭朝驛
研究生(英文) Chao-Yi Peng
學號 n3696133
學位類別 碩士
語文別 中文
論文頁數 63頁
口試委員 指導教授-林睿哲
口試委員-陳炳宏
口試委員-李澤民
口試委員-王詩涵
中文關鍵字 自我聚集單分子層  10-磺酸根癸烷硫醇  循環伏安法  交流阻抗圖譜 
英文關鍵字 self-assembled monolayers  10-mercaptodecanesulfonic acid  cyclic voltammetry  electrochemical impedance spectroscopy 
學科別分類
中文摘要 自組裝單分子層具有一緻密且排列良好之特性,且製備相當容易,尤其末端官能基亦可改質,近年來有廣泛的研究,在本實驗中使用十個碳的硫醇,末端修飾為磺酸根做為官能基,形成自組裝單分子膜。
先前的研究為得到品質較好的金基材,為去除表面汙染物,對金基材做表面預處理參數已有最佳的結果,也做過動力學分析,但無一定論。先前發現0.01 mM符合Langmuir動力學吸附模式相似,但是2 mM的高濃度下,卻不遵循此吸附模式。
本實驗參照先前的預處理參數成長自組裝單分子層,使用接觸角做初步鑑定看再現性,更進一步使用不同帶電性的氧化還原對(redox couple)作循環伏安法(CV)及交流阻抗分析(EIS)作定性分析,來研究不同濃度磺酸根癸烷硫醇的成長機制。
由電化學實驗中發現無論0.01 mM或是2 mM,隨成長時間增加,表面排列趨於緊密,推翻先前有脫附情形的推測。而2 mM成長濃度下自組裝單分子層的緻密程度比0.01 mM來的更好,另外2 mM在長時間的成長下,推論由於排列的緣故,可能導致為烷鏈露出的情形,因此接觸角有上升的趨勢。
英文摘要 Self-assembled monolayers (SAMs) have been recognized as the surface being able to form a well-defined structure. In addition to their ease of preparation, the terminal functionality of these SAMs can be tailored in preparing surfaces with different surface properties. In this study, a novel SAM was prepared by the 10-mercaptodecanesulfonic acid on gold substrate.
In our group’s previous study, a proper cleaning method has been developed for the gold substrate prior to the SAM formation by the 10-mercaptodecanesulfonic acid ethanolic solution. In addition, the kinetic of the SAM formation with this sulfonic acid-terminated alkanethiol was analyzed with Langmuir model. It was noted the formation of sulfonic acid terminated SAM from 0.01 mM ethanolic solution could be successfully fitted with Langmuir kinetics while that from the 2mM ethaolic solution cannot.
In this study, a further evaluation on these sulfonic acid-terminated SAMs was attempted using electrochemical analysis methods. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) with different electrical redox couple were used to further analyze the growth mechanism of these sulfonic acid terminated SAMs that were prepared from different ethanolic solutions.
Based on these electrochemical analyses results, the surface of sulfonic acid terminated SAMs were becoming more filled with the alkanethiols as the immersion time increase, irrespective of the alkanethiol concentration. This is contradictory to what was proposed in our group’s previous study that part of the adsorbed alkanethiols might be desorbed as the immersion time increase. Besides, for the SAMs prepared from the 2 mM solution, the surface density of the sulfonic acid terminated alkanethiol was higher than that on the SAMs prepared from the 0.01 mM ethanolic solution in the short immersion time. However, as the immersion time further increased (e.g. 24 hours), the SAMs prepared from 2 mM solution would become less well organized as indicated by the increase of surface contact angle. This is likely attributed to the exposure of the alkyl chain on the surface following the reorientation of the alkanethiol on the SAMs.
論文目次 中文摘要…………………………………………………………………… I

英文摘要…………………………………………………………………… II
致 謝…………………………………………………………………….... III
目 錄…………………………………………………………………….... IV
表 目 錄…………………………………………………………………….. VI
圖 目 錄…………………………………………………………………….. VII
主 文
第一章、前言…………………………………………..……………….. 1
第二章、文獻回顧………………………………………..…………… 2
2.1負電性官能基對血液相容性之影響……………..……...... 2
2.2有機單分子層的簡介……………………………..…………...... 3
2.3金基材的預處理……………………………..…………………..... 9
2.4研究動機與目的……………………………..….……………….... 10
第三章、實驗及分析儀器原理及應用簡介……………...….. 11
3.1實驗儀器原理……………………………..…………………......... 11
3.1.1真空蒸鍍法……………………………..………………….......... 11
3.2分析儀器原理及其應用................................................. 12
3.2.1接觸角(Contact angle)………………………………......... 12
3.2.2循環伏安法(Cyclic Voltammetry, CV)……….......... 13
3.2.3電化學交流阻抗分析
(Electrochemical Impedance spectroscopy, EIS)....... 14
第四章、實驗方法……………………………………………………... 22
4.1 實驗藥品與儀器……………………………..………………........ 23
4.2 實驗步驟..................................................……………........ 25
4.2.1 10-硫醇癸烷基磺酸之合成....................................... 25
4.2.2黃金基材(Gold substrate)的製備............................ 26
4.2.3金基材表面於形成單分子層前的前處理……............ 27
4.2.4自我聚集單分子層成長機制分析方法………….......... 27
4.2.5送測樣本的保存與測量方法…………………………........ 28
第五章、結果與討論………………………………………………….. 30
5.1 接觸角之量測…………………………………………………....... 30
5.2 電化學分析的結果……………………………………………..... 32
5.2 綜合比較…………………………………………………………...... 36
第六章、結論與未來展望…………………………………………… 39
參考文獻………………………………………………………………….... 58
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