Song Shuyan, Wang Xiao, Li Sheling, Wang Zhuo, Zhu Qi, Zhang Hongjie
State Key Laboratory of Rare Earth Resource Utilization , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China . Email:
School of Material Science and Engineering , Changchun University of Science and Technology , Changchun , 130022 , P. R. China.
Chem Sci. 2015 Nov 1;6(11):6420-6424. doi: 10.1039/c5sc01686j. Epub 2015 Jul 23.
Recent studies have further demonstrated that the conjugation of noble metal helical nanostructures could alter their optical and catalytic activities. However, the intrinsic isotropic crystal growth of Pt makes the synthesis of high-quality Pt NCs with unique porous or branched nanostructures difficult. In this work, a new, powerful capping agent, ,-dimethyloctadecylammonium bromide acetate sodium, was synthesized and used to coordinate Pt ions, slowing down the reaction rate. As a result, in aqueous solution, Pt nanohelices with highly ordered horizontal pore channels were successfully fabricated. Importantly, the Pt nanohelices were composed of several sub-2 nm Pt nanowires coiled together around a central point. The as-obtained samples exhibited enhanced photothermal properties compared with the classic Pt nanoparticles.
最近的研究进一步表明，贵金属螺旋纳米结构的共轭可以改变其光学和催化活性。然而，铂的固有各向同性晶体生长使得合成具有独特多孔或分支纳米结构的高质量铂纳米晶体变得困难。在这项工作中，合成了一种新型的、强大的封端剂，即溴化二甲基十八烷基铵乙酸钠，并用于配位铂离子，减缓反应速率。结果，在水溶液中成功制备了具有高度有序水平孔道的铂纳米螺旋。重要的是，铂纳米螺旋由几根围绕中心点缠绕在一起的亚2纳米铂纳米线组成。与经典的铂纳米颗粒相比，所获得的样品表现出增强的光热性能。
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