探討金奈米立方體自組裝基板之表面增強拉曼散射效應於農藥檢測之應用

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研究生：	蔡苡娸 I-Chi Tsai
論文名稱：	探討金奈米立方體自組裝基板之表面增強拉曼散射效應於農藥檢測之應用 Surface-Enhanced Raman Scattering of Self-assembly Gold Nanocubes for Selective Pesticide Detection
指導教授：	黃炳照 Bing-Joe Hwang 郭俊宏 Chun-Hong Kuo
口試委員:	陳祺 Chi Chen
學位類別：	碩士 Master
系所名稱：	工程學院 - 化學工程系 Department of Chemical Engineering
論文出版年：	2016
畢業學年度：	104
語文別：	英文
論文頁數：	81
中文關鍵詞：	表面增強拉曼散射、農藥
外文關鍵詞：	SERS, Pesticide
相關次數：	點閱：273 下載：10
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光學感測是檢測分子的一個新興研究領域。其中，基於奈米結構表面的特性表面增強拉曼散射技術廣泛被研究。表面拉曼散射效應通常與金屬奈米結構的電磁場分布強度有關，而電磁場的強弱和奈米粒子的幾何形狀相關。除了幾何形狀之外，二聚體之間的間隙也是提升電磁場強度的策略之一，而在奈米粒子擁有很強電磁場效應的區域我們稱為熱點。在本文中，我們的目標是利用來自這兩種現象的熱點，建立一個以奈米結構增強表面拉曼散射效應並根據親和力選擇性的偵測氨基甲酸酯類農藥的方法。

Optical sensing is an emerging research field for molecule detection. Among them, nanostructure-based SERS sensing is so far the most investigated technique. The performance of SERS effect usually relies on the strength and distribution of plasmonic electromagnetic fields (PEFs) of the metallic nanostructures, which is geometry-dependent in a shaped nanostructure. Apart from the geometry, plasmonic coupling in-between the gap of a dimer is also a strategy for raising the strength of PEFs. When the strength of PEF is very strong locally where could be called hot spots. In this thesis, we aim to utilize the hot spots from the two phenomena together to compose a nanostructure-based SERS sensor with affinity selectivity in the detection of Carbamate pesticides.

摘要	I
ABSTRACT	III
TABLE OF CONTENT	VI
LIST OF FIGURES	IX
LIST OF SCHEMES	XVIII
LIST OF TABLES	XIX
CHAPTER 1 OVERVIEW	1
1	Research Background	1
2	Recent Developments	2
3	Research Motivation	3
CHAPTER 2 INTRODUCTION	4
1	Surface-Enhanced Raman Scattering (SERS)	4
1.1 Raman scattering development	4
1.2 Principle of SERS	4
1.3 Self-assembled monolayers (SAMs)	5
2 Carbamate pesticides	6
3 Literature Review	7
3.1 Monodispersive Gold Nanoprisms	7
3.2 Vertically Gold Nanorod Monolayer on Substrates and Detection of Food contaminants	10
3.3 Gold Nanocube-Nanosphere Dimers Plasmon Coupling	12
3.4 Gold or Silver Nanocubes Plasmonic Mechanism	15
3.5 SERS Detection of Pesticides by Dithiol-Functionalized Nanoparticle	19
3.6 Gold Nanoisland Film as SERS Substrate for Detection of Fungicides	22
CHAPTER 3 EXPERIMENTAL SECTION	26
1 Chemicals	26
2 Instrumentation	26
3 Procedure	27
3.1 Synthesis of 45 nm Gold nanocube (AuNCs)	27
3.2 Synthesis of Gold nanocube dimers	27
3.3 Synthesis of Gold nanocube Monolayer Film (Au NCs-MLF)	28
3.4 Dithiol molecules functionalized on Au NC MLF	29
3.5 SERS Experiments	29
4 Characterization	30
4.1 Scanning Electron Microscopy (SEM)	30
4.2 Transmission Electron Microscope (TEM)	30
4.3 Powder X-Ray Diffraction (p-XRD)	30
5 Numerical Simulation	30
5.1 FDTD simulation parameter	31
CHAPTER 4 RESULTS AND DISCUSSION	34
1 Au Nanocubes	34
2 Au Nanocube Dimers	36
2.1 Linking of Au Nanocubes	36
2.2 Finite-Difference Time-Domain (FDTD) Simulation of Au NC Dimers	43
2.3 SERS Detection of Pesticide Using Au NC Dimer	48
3 Gold Nanocube Monolayered Films (Au NC MLFs)	50
3.1 Fabrication of Au NC MLF	50
3.2 Finite-Difference Time-Domain (FDTD) simulation of Au NC MLF	53
3.3 SERS Detection of Pesticide Using Au NC MLF	56
CONCLUSION	76
REFERENCES	77

                                

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