本文選題：晶種合成 + 納米金棒��； 參考：《華東師范大學(xué)》2015年碩士論文

【摘要】：納米材料具有量子尺寸效應(yīng)、表面效應(yīng)、小尺寸效應(yīng)等多種特殊性能,因而在材料制備領(lǐng)域受到廣泛關(guān)注。金材料包括納米微球、納米棒、納米片以及納米立方體等多種形貌。其中納米金棒能從橫向、縱向兩個方向上吸收和散射入射光,形成橫向表面等離子共振峰(TSP)和縱向表面等離子共振峰(LSP)。隨著納米金棒的縱橫比發(fā)生變化,縱向等離子共振峰會產(chǎn)生移動,該特性使其在化學(xué)、生物、醫(yī)藥等領(lǐng)域具有廣泛應(yīng)用前景。本文對傳統(tǒng)晶種合成法進行改良,制備縱橫比可調(diào)的納米金棒,同時探討不同因素對納米金棒形貌、尺寸等的影響。本文以晶種合成法為基礎(chǔ),主要研究內(nèi)容包括以下幾點：1.采用單種表面活性劑法,以十六烷基三甲基溴化銨(CTAB)為表面活性劑,成功制備了LSP從600 nm至800 nm可調(diào)的納米金棒。探討反應(yīng)中加入的CTAB質(zhì)量、晶種溶液體積、硝酸銀(AgNO3)溶液體積等對納米金棒縱橫比的影響。同時通過實驗微調(diào),制備出特定尺寸的納米金短棒(縱橫比小于4)。2.采用雙重表面活性劑法,以CTAB和油酸鈉(NaOL)作雙重表面活性劑,成功制備了LSP從800 nm至1200 nm可調(diào)的納米金棒。同時探討反應(yīng)中加入的CTAB質(zhì)量、NaOL質(zhì)量、晶種溶液體積、AgNO3溶液體積等對納米金棒縱橫比的影響。發(fā)現(xiàn)雙重表面活性劑制備的納米金棒尺寸均一,產(chǎn)率高。通過制備工藝改進,制備出特定尺寸,縱橫比大于4的納米金長棒。3.采用微波合成法,以CTAB作表面活性劑,以微波合成器為熱源,成功制備了縱橫比可調(diào)的納米金棒。此方法與傳統(tǒng)晶種合成法相比,通過微波加熱加速了金棒合成,減少了反應(yīng)時間。同時本文探討了反應(yīng)中CTAB質(zhì)量、晶種溶液體積、AgNO3溶液體積以及加熱溫度對納米金棒縱橫比的影響。
[Abstract]:Nanomaterials have many special properties, such as quantum size effect, surface effect, small size effect and so on. Gold materials include nanospheres, nanorods, nanochips and nanocubes. The nanocrystalline gold rods can absorb and scatter incident light in both transverse and longitudinal directions to form transverse surface plasmon resonance (TSPs) and longitudinal surface plasmon resonance (LSPs). With the change of aspect ratio of nanocrystalline gold rod, the longitudinal plasmon resonance summit is moving, which makes it widely used in chemistry, biology, medicine and other fields. In this paper, the traditional seed synthesis method is improved to prepare nanocrystalline gold rods with adjustable aspect ratio, and the effects of different factors on the morphology and size of nanocrystalline gold rods are discussed. This paper is based on the method of seed synthesis. The main research contents include the following points: 1. 1. Using cetyltrimethylammonium bromide (CTAB) as surfactant, the gold nanorods with LSP tunable from 600nm to 800nm were successfully prepared by a single surfactant method. The effects of the mass of CTAB, the volume of seed solution and the volume of silver nitrate Agno _ 3 solution on the aspect ratio of gold nanorods were investigated. At the same time, the nanocrystalline gold short rod with specific size (aspect ratio less than 4? 2) was prepared by experimental fine-tuning. The gold nanorods with adjustable LSP ranging from 800nm to 1200 nm were prepared by double surfactant method using CTAB and sodium oleate as double surfactants. At the same time, the effects of CTAB mass, seed solution volume and Agno _ 3 solution volume on the aspect ratio of gold nanorods were discussed. It was found that the gold nanorods prepared by double surfactants were uniform in size and high in yield. The gold nanorods with specific size and aspect ratio greater than 4 were prepared by improving the preparation process. Nanocrystalline gold rods with adjustable aspect ratio were successfully prepared by microwave synthesis with CTAB as surfactant and microwave synthesizer as heat source. Compared with the traditional seed synthesis method, this method accelerates the synthesis of gold rod by microwave heating and reduces the reaction time. At the same time, the effects of CTAB mass, seed solution volume, Agno _ 3 solution volume and heating temperature on the aspect ratio of gold nanorods were discussed.
【學(xué)位授予單位】：華東師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TG146.31;TB383.1

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