| 研究生: |
謝惠婷 Sei, Hei-Tin |
|---|---|
| 論文名稱: |
以奈米級模板製作不同形狀金奈米粒子與二氧化矽中空螢光奈米球 Nanotemplation forming particles︰ Au and fluorescent SiO2 nanoparticles |
| 指導教授: |
葉晨聖
Yeh, Chen-Sheng |
| 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: | 2009 |
| 畢業學年度: | 97 |
| 語文別: | 中文 |
| 論文頁數: | 84 |
| 中文關鍵詞: | 模板 、金奈米粒子 、二氧化矽 |
| 外文關鍵詞: | silica, gold nanoparticles, template |
| 相關次數: | 點閱:76 下載:1 |
| 分享至: |
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在本篇論文研究中以奈米級模板去製作不同形狀的金奈米粒子與二氧化矽中空螢光奈米球,在第一部分的研究中以軟性明膠奈米球作為模板,明膠奈米粒子具有很好的水溶性因此實驗中利用種子間接成長法(seed mediated growth method)的方式於模板上成長出金奈米棒、雙箭頭金奈米棒與四足狀金奈米粒子等三種形狀,明膠奈米球/金奈米棒藉由改變銀離子的濃度可具有光學可調性,並且金奈米棒還能夠在明膠模板上進行二次成長合成出具有雙箭頭形狀的金奈米棒,第三種形狀即是在明膠奈米球表面成長四足狀的金奈米粒子,從紫外光-可見光吸收光譜圖的量測結果中發現即使經過離心清洗後披覆在明膠奈米球表面的金粒子的吸收值幾乎沒有下降,表示沒有不可逆的聚集現象產生而仍然具有很好的光學穩定性。
第二部分研究中以Gd2O(CO)3‧H2O奈米粒子此硬性材質的模板合成二氧化矽空球,經由高溫鍛燒後二氧化矽空球結構本身的缺陷在給予激發能量後會產生螢光,其中以mol%APTES=6%的二氧化矽空球以升溫速率為2℃/min條件下鍛燒300℃並持溫1小時具有最好的量子產率。
In this study, nanoscale template approach was used to fabricate different shapes of gold nanoparticles and fluorescent hollow silica nanospheres. In partⅠ, gelatin nanoparticles was employed as a soft template, because of its excellent water-soluble property, therefore by use seed mediated growth method, we are able to grow the gold nanorods, gold arrow headed nanorods and gold nanotetrapods. Gelatin nanoparticle/Au nanorods would exist adjustable optical properties by varying the concentration of silver ion. Furthermore, it also allowed the synthesis of secondary growth with arrowhead shape of gold nanorods. In addition to, UV-Visble absorption of the Gelatin/Au nanoparticles were found unchanged even after several times of centrifugation. It proved that there is no irreversible aggregation phenomenon and still maintain an excellent optical stability.
In part Ⅱ, Gd2O(CO)3 ‧H2O nanoparticles as a hard template was used to synthesize hollow silica nanospheres. Calcination of hollow silica nanosphere created defects in the structure which can irradiated fluorescence. The results showed mol% APTES = 6% of hollow silica nanospheres were dried and subsequently calcined in air at 400oC for 1h at heating rate 2oC/min condition provided best quantum yield.
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