- 學位論文
金屬鹽類添加對金銀奈米粒子合成之影響
The influence of metal salt additive to the synthesis of Gold-Silver Nanoparticle
摘要
本文主要是在探討奈米金在不同金屬鹽類的添加下成長的情況。本實驗主要在探討以金奈米棒以及啞鈴形之金奈米棒作為核心，來合成金銀核殼的奈米粒子；本實驗主要使用兩種保護劑，包含陽離子型的Cetyltrimethylammonium bromide (CTAB)以及陰離子型的Sodium dodecyl sulfate (SDS)做為反應的環境，先在CTAB的條件下，將金奈米棒合成出來以後，藉由系統轉移把金奈米棒置換到SDS的陰離子系統當中，最後再進行包銀。實驗中主要分成金奈米棒(GNRs)以及啞鈴型金奈米棒(AuDBs)去進行包銀，分別在室溫條件進行逐次包銀及高溫條件下的一次性包銀，亦發現若添加金屬鹽類物質(如 NaBr、NaCl)，會對反應時間發生變化；甚至會影響金銀核殼奈米粒子的形狀的比例。藉由改變添加的金屬鹽類、溫度變化、EDTA修飾等處理，進而合成出矩形、雙四角錐、不規則等多樣形態，也對型態控制及均勻度控制做進一步的了解。
並列摘要
In this research we pay attention on the synthesis of Gold Nanorods (GNRs) and Au Dumbbells (AuDBs) as core to format Au-Ag core-shell nanoparticles. At experiment we use two different type of surfactants, Cetyltrimethylammonium bromide (CTAB) and Sodium dodecyl sulfate (SDS), as the reaction environment. We make GNRs in CTAB system and then use system transform to move GNRs to the System of SDS, in the end we coated silver as shell. In the experiment, we separate in two part to coated silver shell one is GNRs another one is AuDBs each one with high temperature condition and Room temperature condition. We found that if we add metal salt like NaBr or NaCl in high temperature condition, it will have influence to reaction time. Even more will affect the ratio of the shape of gold-silver nanoparticle. Through use the difference meatal salt, and the change of temperature, we could synthesis rectangular, bipyramid and irregular shape, we also have more realize for the shape control and the homogeneity improve.