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研究生： 陳秋樺
Chiu-Hua Chen
論文名稱： 一、水相加熱法合成極小三角金奈米片狀結構 二、以植晶法製備具雙錐狀金奈米結構及其形狀轉換成多分支楊桃狀金奈米粒子
I. Thermal Aqueous Solution Approach for the Synthesis of Ultra-Small Gold Nanoplates II. Controlled Synthesis of Bipyramid-Shaped Gold Nanoparticles by Seed-Mediated Growth and Their Transformation into Star Fruit-Shaped Branched Nanocrystals
指導教授： 黃暄益
Michael H. Huang
口試委員:
學位類別： 碩士
Master
系所名稱： 理學院 - 化學系
Department of Chemistry
論文出版年： 2007
畢業學年度： 95
語文別： 英文
論文頁數： 74
中文關鍵詞： 植晶 、奈米粒子 、奈米晶體 、分支 、截面 、硝酸銀
外文關鍵詞： seeding growth, branch, nanoparticle, nanocrystal, faceted
相關次數： 點閱：2  下載：0 
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    • 本篇論文包含兩個不同的研究主題，第一個部份利用水相加熱合成極小的三角片狀結構，而第二部份則是利用植晶法合成出雙錐狀和具五個分支的楊桃狀金奈米粒子。
    本篇論文第一部份在水相加熱的系統中，利用氯金酸；檸檬酸鈉(trisodium citrate) 溴化十六烷三甲基銨 (cetyltrimethylammonium bromid) 且同時控制反應物濃度、時間，即可還原合成出極小的三角片狀結構，由於三角片狀結構的大小和形狀相似，導致有2D自組裝的排列現象產生。
    本篇論文第二部份藉由傳統植晶法的合成方式，在合成過程中加入硝酸銀，促使產生雙錐狀的金奈米粒子和同時亦可成具五個分支的楊桃狀金奈米粒子。在整個實驗中，改變硝酸銀所加入的量，可以去控制多分支結構的金奈米晶體形狀結構。為了去了解其結構，我們亦做了穿透式電子顯微鏡以及高解析穿透式電子顯微鏡的鑑定。

    Thermal Aqueous Solution Approach for the Synthesis of
    Ultra-Small Gold Nanoplates

    We report a study on the thermal aqueous solution approach of ultrasmall triangular gold nanoplates with average widths of 40 ± 7 and 58 ± 10 nm. Because of their relatively uniform sizes, these tiny nanoplates can spontaneously self-assemble into some ordered 2-dimensional structures such as the hexagonally arranged pattern. UV-vis absorption spectroscopy showed that these nanoplates exhibit a strong absorption band at 590-602 nm and a weak and broadband centered at ~775-900 nm.

    Controlled Synthesis of Bipyramid-Shaped Gold Nanoparticles by Seed-Mediated Growth and Their Transformation into Star Fruit-Shaped Branched Nanocrystals

    We report a study on the synthesis of bipyramid-shaped gold nanoparticles by a seed-mediated approach and their transformation into star fruit-shaped branched nanocrystals by adding a certain amount of Ag+ ions to different solutions in the process. The colloidal of AgCl and AgBr nearby the side surfaces of gold seeds make the growth slowly, and gold atoms deposit at the twin boundaries and led to their unsymmetrical growth, all of which is the source of forming star fruit-shaped branched nanocrystals.

    Abstract i Acknowledgements iii Table of contents iv List of Figures vi List of Tables viii CHAPTER 1 A SURVEY ON GOLD NANOPLATES AND BRANCHED NANOCRYSTALS 1.1 Introduction 1 1.2 Synthesis and Applications of Gold Nanostructures with Size and Shape Control 3 1.3 Synthesis of Gold Nanoplates Using Various Approaches 9 1.3.1 Seed-Mediated Growth Method 9 1.3.2 Polyol Process Using PVP 11 1.3.3 Biological Synthesis of Gold nanoplates 12 1.4 Investigation of Branched Gold Nanocrystals 14 1.4.1 pH-Controlled Growth of Branched Gold Nanocrystals 14 1.4.2 Reducing Agent and Surfactant Assisted Growth of Gold Nanocrystals 16 1.4.3 Silver(I)-Assisted Growth of Gold Nanocrystals 18 1.5 References 24 CHAPTER 2 THERMAL AQUEOUS SOLUTION APPROACH FOR THE SYNTHESIS OF ULTRA-SMALL GOLD NANOPLATES 2.1 Introduction 27 2.2 Experimental Section 28 2.3 Results and Discussion 30 2.4 Conclusion 38 2.5 References 39 CHAPTER 3 GOLD NANORODS WITH NITRIC ACID CONTROLLED SYNTHESIS OF BIPYRAMID-SHAPED GOLD NANOPARTICLES BY SEED-MEDIATED GROWTH AND THEIR TRANSFORMATION INTO STAR FRUIT-SHAPED BRANCHED NANOCRYSTALS 3.1 Introduction 41 3.2 Experimental Section 44 3.2.1 Preparation of Gold Seeds 44 3.2.2 Preparation of Growth Solution 45 3.2.3 Synthesis of Branched Gold Nanocrystals. 45 3.3 Results and Discussion 48 3.4 Conclusion 70 3.5 References 72

    CHAPTER 1
    A Survey on Gold Nanoplates and Branched Nanocrystals

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    CHAPTER 2
    Thermal Aqueous Solution Approach for the Synthesis of
    Ultra-Small Gold Nanoplates

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    CHAPTER 3
    Controlled Synthesis of Bipyramid-Shaped Gold Nanoparticles by Seed-Mediated Growth and Their Transformation into Star Fruit-Shaped Branched Nanocrystals

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