金奈米粒子的合成與其光譜特性

The Synthesis of Gold Nanoparticle and Spectral Property

10.29688/MHJ.200902.0011

陳秀娘(Hsiu-Liang Chen)；陳文貴(Wen-Kang Chen)；林孟姿(Meng-Tzu Lin)；陳怡樺(Yi-Hua Chen)

金奈米粒子 ； 光譜性質 ； 化學還原法 ； Gold nanoparticle ； Spectral property ； Chemistry reduction method

明新學報

35卷1期（2009 / 02 / 01）

119 - 134

繁體中文

本研究主要是描述金奈米粒子的最大表面電漿吸收光譜特性及其最大吸收波長，而金奈米粒子的合成是利用四氯金酸(HAuCl4)與還原劑在陽離子界面活性劑(CTAB)的溶液當保護劑中，利用化學還原法直接生成金奈米粒子，文中探討四氯金酸的濃度、還原劑的濃度、界面活性劑的濃度及反應溫度，對金奈米粒子生成之影響，另外也探討金奈米粒子的穩定性。有關金奈米粒子的光譜特性則利用UV/Vis光譜儀測試。研究結果發現在相同的條件下，利用冰浴，以NaBH4當還原劑所合成出的金奈米粒子之平均粒徑為11.70 nm，而以N2H5OH當還原劑所合成出的金奈米粒子之平均粒徑為20.25 nm，有關金奈米粒子之結構及大小藉由穿透式電子顯微鏡(TEM)拍攝出的影像得以驗證。

This study mainly focused on the properties of the maximum surface plasmon absorption of gold nanoparticles and their wavelengths. The synthesis of gold nanoparticles made use of HAuCl4 aqueous solution and reducing agent, through the chemistry reduction method, with reductant in the presence of the cetytrimethylammonium bomide (CTAB ) aqueous solution as protecting agent. The influence of concentration of HAuCl4, reductant, surfactant, and temperature on the synthesis of gold nanoparticles were explored. In addition, the stability of the gold nanoparticles was also explored. Measurements of spectral properties of gold nanoparticles were done by UV/Vis spectrometer. When NaBH4 was used as a reductant, the average diameter of gold nanoparticles was 11.70 nm. When N2H5OH was used as a reductant, the average diameter of the synthesized gold nanoparticles was 20.25 nm. The structures and sizes could be identified by the transmission of electron micrograph (TEM) images.

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