三维结构金纳米花的快速可控合成及其分析应用研究

Fast and Controllable Synthesis of Three-dimensional Gold-nanoflowers and Their Analytical Applications

以多巴胺(DA)为还原剂和包被剂,与氯金酸(HAuCl4)作用,一步合成得到具有高度复杂三维结构的金纳米花(AuNFs)。合成方法简单、可控、操作性强,只需70℃水浴反应10 min。实验发现,多巴胺溶液的新鲜程度和浓度是决定AuNFs形貌的关键因素,而4-(2-羟乙基)-1-哌嗪乙烷磺酸(HEPES)可用于调节AuNFs的尺寸,引入常用表面活性剂如Triton X-100、Tween-80、CTAB等会影响其形貌。由于AuNFs具有复杂的三维结构,在棱角处可能存在强电场,在催化、光热治疗等方面有较广阔的应用前景。

A simple,controllable and feasible method to prepare gold nanoflowers（AuNFs） with a highly complex three-dimensional structure was developed by using dopamine（DA） as reducing agent and capping agent to react with gold chloride acid（HAuCl4） in 70 ℃ within 10 min.It was found that the freshness and concentration of dopamine solution were the key factors in controlling the morphology of AuNFs,while the concentration of 4-（2-hydroxyethyl）-1-piperazineethanesulfonic acid（HEPES） could be used to adjust the size of AuNFs,and the introduction of the common surfactants such as Triton X-100,Tween-80,CTAB could also affect the morphology of AuNFs.Because of the complex three-dimensional structure,AuNFs may have strong electric field at edges and corners,which makes AuNFs have potential applications in catalysis,photothermal therapy.