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种子生长法制备长径比为2-5的金纳米棒
Preparation of Gold Nanorods with Aspect Ratio 2-5 by Using Seed Mediated Growth Method
【摘要】 报道了种子生长法合成金纳米棒。以氯金酸(HAuCl4)为原料,以硼氢化钠(NaBH4)为还原剂,首先还原金离子(Au3+)得到直径为3-4nm的金种子。以银离子(Ag+)为辅助离子,以十六烷基溴化铵(CTAB)为表面活性剂,以抗坏血酸为弱还原剂,加入金种子溶液之后可以获得纳米棒。研究表明,通过改变银离子的用量可以控制金纳米棒长径比为2-5。TEM和UV-vis光谱的表征证实了金纳米棒的形貌和光谱特征,并深入探讨了金纳米棒的生长机理。
【Abstract】 The studies on the synthesis of gold nanorods by a seed mediated growth method were reported.The seeds chosen for these studies have average diameter of 3-4nm.A dependence of the nanorod aspect ratio on the amount of silver ion is observed.Increasing the silver ion amount results in higher of the gold nanorod aspect ratios.The gold nanorods synthesized were characterized by transmission electron microscopy(TEM) and UV-vis spectroscopy.
【关键词】 低维金属材料;
金纳米棒;
种子生长法;
形貌控制;
【Key words】 low dimensional metal materials; gold nanorod; seed mediated growth method; shape control;
【Key words】 low dimensional metal materials; gold nanorod; seed mediated growth method; shape control;
【基金】 国家重大基础研究发展“973”计划资助项目(2005CB724300-G);国家自然科学基金资助项目(30471599);上海市科委资助项目(054119527)
- 【文献出处】 材料科学与工程学报 ,Journal of Materials Science and Engineering , 编辑部邮箱 ,2007年03期
- 【分类号】TB383.1
- 【被引频次】41
- 【下载频次】1933