頁籤選單縮合
題名 | 金屬奈米粒子的吸收光譜=The Syntheses and Absorption Spectra of Several Metal Nanoparticle Systems |
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作者 | 張仕欣; 王崇人; | 書刊名 | 化學 |
卷期 | 56:3 1998.09[民87.09] |
頁次 | 頁209-222 |
分類號 | 343.16 |
關鍵詞 | 金屬奈米粒子; 奈米圓柱; 核層奈米結構; 古典靜電場理論; Mie/drude理論; Metal nanoparticles; Nanorods; Core-shell sturcture; Classical electrostatic model; |
語文 | 中文(Chinese) |
中文摘要 | 我們探討不同種金屬奈米結構粒子的吸收光譜特性,光譜中的特性吸收波帶(即 所謂之表面電漿共振波帶 ) 的性質分別以理論及實驗兩方面來作說明, 並相互印證與比較 。在理論方面,是以古典靜電場理論 (即 Mie/Drude 理論 ) 為主,加以與粒徑大小的有關 的修正項,分別對球形、扁長橢圓形以及核層結構之金屬奈米粒子系統作計算,求得吸收截 面積光譜。實驗方面,介紹電化學法及及雷射侵蝕法分別製備金奈米圓柱以及鈀奈米球,同 時介紹玻璃奈米鍍層於金奈米球及奈米圓柱的製備。在比較實驗所得之吸收光譜以及理論所 預測之後,顯示出古典理論在預測金屬奈米結構的吸收光譜方面的一般可信度。 |
英文摘要 | We demonstrate the general features of the absorption spectra for a metal nanoparticle, which were predicted by the classical electrostatic model (Mie/Drude formalism) and measured experimentally. The size-dependent correction was introduced into the calculations for the cases of metal nanospheres, prolate nanospheroids and coated nanospheres. Two methodologies for preparing metal nanostructures are described: an electrochemical method for the synthesis of suspended gold nanorod aqueous solutions and a laser ablation technique for preparing Pd nanoparticles in water. Also, a coreshell structure for nano-thickness silica coated gold nanospheres and gold nanorods are. fabricated. The absorption spectral features of all of these metal nanostructures are compared to the classical model predictions. A general agreement on both theory and experiments is illustrated. |
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