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研究生:王炫仁
研究生(外文):Shiuann-Ren Wang
論文名稱:鎳核/金殼及鎳核/銀殼複合奈米粒子之製備
論文名稱(外文):Synthesis of Ni/Au and Ni/Ag core-shell nanoparticle
指導教授:陳東煌陳東煌引用關係
指導教授(外文):Dong-Hwang Chen
學位類別:碩士
校院名稱:國立成功大學
系所名稱:化學工程學系碩博士班
學門:工程學門
學類:化學工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:65
中文關鍵詞:奈米粒子
外文關鍵詞:nanoparticlescoreshell
相關次數:
  • 被引用被引用:7
  • 點閱點閱:514
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  • 下載下載:155
  • 收藏至我的研究室書目清單書目收藏:0
  本論文主要在乙二醇中在25℃下,在已製備的鎳奈米粒子表面上,成長具有光學特性的貴重金屬(金或銀)殼,使用兩種方式製備核/殼結構粒子,一為聯胺還原法,另一為氧化還原法。在聯胺還原法的部份,使用聯胺當還原劑,將金或銀的前驅鹽在鎳奈米粒子的表面上還原,生成具有光學特性的殼層。在氧化還原法的部份,利用氧化還原電位的差異,將金或銀離子溶液加入含鎳奈米粒子的乙二醇溶液,形成具有光學特性的殼層。
  使用TEM、EDX、XRD、電子繞射圖、ESCA及UV/VIS分析粒子的大小、成份、結構,並由實驗數據判斷殼層是否有緻密包覆核層,而且探討在以鎳為核、貴重金屬(金或銀)為殼的核/殼結構下粒子的吸收特性峰位置。
  以聯胺還原法製備的鎳核/金殼及鎳核/銀殼奈米粒子之特性吸收峰分別在565nm及420nm。以氧化還原法所得鎳核/金殼及鎳核/銀殼奈米粒子的特性吸收峰分別在582nm及451nm。
  由ESCA分析,得知以聯胺還原法我們可以製備出緻密包覆的殼層,但以氧化還原法卻不能製備出緻密包覆的核/殼結構奈米粒子。在XRD與電子繞射的部份,我們得知殼層結構為面心立方(f.c.c)結構。
  In this thesis, the precious metal shell that showed the optical properties were been prepared on the surface of nickel nanoparticles in the EG solution at 25℃ by two methods . One is using hydrazine as the reducing agent, and other is using difference of oxidation- reduction potential. In the part of using hydrazine, the gold(or silver) shell were prepared on the surface of nickel nanoparticles by using hydrazine as the reducing agent to reduce the precursor. In the part of using difference form oxidation- reduction potential between Au (or Ag)and Ni , the ion of Au(or Ag) were added into the ethylene glycol solution that were consist of Ni nanoparticles to form the core/shell structure nanoparticles.
  The composition, structure and size were characterized by mean of TEM, EDX, XRD ,ESCA and electron diffraction pattern . The optical properties of Ni/Au or Ni/ Ag (core/shell)nanoparticles were characterized by the position of wavelength from UV/VIS absorption spectra. Determine that core is coated with Au (or Ag )compactly by the experimental data.
  By the method of hydrazine reduction, the wavelength of UV/VIS absorption spectra for Ni/Au and Ni/Ag is 565nm and 420nm.By the method of oxidation- reduction, the wavelength of UV/VIS absorption spectra for Ni/Au and Ni/Ag is 582nm and 451nm.
  ESCA revealed that the Ni core is coated with Au (or Ag )compactly by the hydrazine reduction, but it is not by the oxidation-reduction. By the analyses of XRD and electron diffraction pattern, the shell of Ni/Au (or Ni/Ag)core/shell nanoparticles with face-centered cubic (f. c. c)structure.
中文摘要…………………………………………………………………...I
英文摘要………………………………………………………………….II
誌謝………………………………………………………………………III
總目錄……………………………………………………………………IV
表目錄…………………………………………………………………....VI
圖目錄…………………………………………………………………..VII
符號說明………………………………………………………………....IX

第一章 緒 論
1.1 前言…………………………………………………..………….…….1
1.2 奈米粒子之簡介……………………………...……………....……….1
1.3 核(core)/殼(shell)奈米粒子之簡介……………………………6
1.4 奈米粒子之應用……………………………………………………..11
1.5 研究內容與動機……………………………………………………..12

第二章 理論部份
2.1合成核/殼結構雙金屬奈米粒子之反應機構………………………..13
2.2磁性理論……………………………………………………………...14
2.3光學特性……………………………………………………………...17
2.4氧化還原電位………………………………………………………...21

第三章 實驗部分
3.1藥品、儀器與材料………………………………………….….…….22
3.2鎳核/金殼與鎳核/銀殼奈米粒子的製備及特性分析……………….24

第四章 結果與討論
4.1鎳奈米粒子之製備…………………………………………………...27
4.2聯胺還原法製備核/殼複合奈米粒子………………………………..29
4.3氧化還原法製備核/殼複合奈米粒子……………………………......49

第五章 結論……………………………………..……………………...61

參考文獻………………..……………………………...………………....62

自述……………………………………………………………………….65
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