臺灣博碩士論文加值系統

本研究以剪力水平表面聲波感測器量測與分析自我組裝單分子膜吸附於金屬基板表面之動力學模式。剪力水平表面聲波感測器具有小體積、低成本、製程簡單等優點，因此本裝置用於液體上之感測具有相當大之潛力；加上元件本身具有微量感測獨特性質，因此將此裝置用於自我組裝單分子膜量測。文獻報導相當多的研究分析自我組裝單分子膜的特性與其應用，但關於自我組裝單分子膜形成之動力學機制尚未有完整的定義。本研究設計之聲波感測器的中心頻率介於26MHz至103MHz的範圍，而感測器的感測區上蒸鍍金膜來作為自我組裝單分子膜的吸附層，即時偵測自我組裝單分子膜吸附質量變化，並推論單分子成膜動力學。我們利用烷基二硫代羧酸和烷基硫醇來作為自我組裝單分子膜之化學分子，期望藉由剪力水平表面聲波感測器來提供自我組裝單分子膜簡單的吸附動力學模式。

In this study, we propose to develop a shear-horizontal surface acoustic wave (SH-SAW) sensor for self-assembled monolayers (SAMs) adsorption measurement. SH-SAW sensor is small, inexpensive, and easy to fabricate for liquid sensing. These provide us an opportunity to study SAM systems in the laboratory conditions. Although the properties and applications of SAMs on gold are well studied, the fundamental kinetic mechanism of SAM formation remains poorly defined. To our best knowledge, the adsorption kinetics of ADTCA SAMs has never been studied. In this study, we aim to measure the SAM mass loading by SH-SAW and network analyzer. This technique acquires sequential data in frequency domain that makes it possible to investigate the adsorption mechanism of self-assembled monolayer in real time. The central frequency of the sensor devices was set from 26 to 103 MHz. The sensitive area of SH-SAW sensor was coated with Au as an adsorptive layer. Then the aliphatic dithiocarboxylic acids (ADTCA) as well as alkanethiols SAMs were used as analyte. We tend to obtain a simple kinetic model for adsorption of SAMs by using SH-SAW sensors. It is hoped that this study will provide a further understanding of the dynamics of SAM formation by using a compact and inexpensive sensor device.

摘 要 I
Abstract II
Table of Contents III
List of Illustrations V
List of Tables VIII
Chapter 1 Introduction 1
1.1 Literatures Survey 1
1.2 Motivation 4
Chapter 2 Theory and Analysis 7
2.1 Piezoelectricity and Surface Acoustic Waves 7
2.1.1 Piezoelectricity 7
2.1.2 The Theory of Surface Acoustic Wave 9
2.2 SH-Type Wave Sensors 12
2.3 Self-Assembled Monolayer (SAMs) 15
2.3.1 Organic Monolayer Films 15
2.3.2 Various Self-Assembled Monolayer systems 18
Chapter 3 Experimental Section 24
3.1 SH-SAW Materials 24
3.2 Configuration of SH-Wave Devices 24
3.2.1 Crystal Cut of Piezoelectric Substrate 24
3.2.2 Design of the IDT 26
3.3 Fabrication Process 29
3.3.1 The Pretreatment Process of Piezoelectric Substrate 29
3.3.2 Photolithography 29
3.3.3 The Matching Circuit of SAW Sensor Device 36
3.4 Synthesis Materials 37
3.5 Synthesis and Purification 37
Chapter 4 Result and Discussion 41
4.1 The Frequency Response of SH-SAW Sensor Device 41
4.2 VEE Program for Real Time Measurement 46
4.3 Liquid Loading Effect 52
Chapter 5 Conclusion 54
References 55

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