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首页> 外文期刊>Chemistry: A European journal >One-step synthesis of large-aspect-ratio single-crystalline gold nanorods by using CTPAB and CTBAB surfactants
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One-step synthesis of large-aspect-ratio single-crystalline gold nanorods by using CTPAB and CTBAB surfactants

机译：CTPAB和CTBAB表面活性剂一步法合成大纵横比单晶金纳米棒

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Gold nanorods were prepared in high yields by using a one-step seed-mediated process in aqueous cetyltripropylammonium bromide (CTPAB) and cetyltributylammonium bromide (CTBAB) solutions in the presence of silver nitrate. ne diameters of the nanorods range from 3 to 11 nm, their lengths are in the range of 1.5 to 350 nm, and their aspect ratios are in the range of 2 to 70. The diamers of the Au nanorods obtained from one growth batch in CTPAB solutions decrease as their lengths increase, and their volumes decrease as the aspect ratios increase. The diameters of the Au nanorods obtained from one growth batch in CTBAB solutions first decrease and then slightly increase as their lengths increase, and their volumes increase as the aspect ratios increase. These An nanorods are single-crystalline and are seen to be oriented in either the [100] or [110] direction under transmission electron microscopy imaging, irrespective of their sizes. To the best of our knowledge, this is the first report of the preparation by using wet-chemistry methods of single-crystalline Au nanorods with aspect ratios larger than 15.
机译：在硝酸银存在下，通过在十六烷基三丙基溴化铵水溶液（CTPAB）和十六烷基三丁基溴化铵（CTBAB）溶液中使用一步式种子介导的方法，可以高收率制备金纳米棒。纳米棒的直径为3至11nm，长度为1.5至350nm，并且长径比为2至70。从CTPAB中的一个生长批次获得的金纳米棒的二聚体。解决方案随着长度的增加而减小，其体积随着纵横比的增加而减小。从一个生长批次在CTBAB溶液中获得的Au纳米棒的直径先减小，然后随着长度的增加而略有增加，其体积随着长径比的增加而增加。这些纳米棒是单晶的，在透射电子显微镜成像下，不论其尺寸大小，都可以在[100]或[110]方向上取向。据我们所知，这是使用湿化学方法制备的长宽比大于15的单晶金纳米棒的首次报道。

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