Controlled morphogenesis and self-assembly of bismutite nanocrystals into three-dimensional nanostructures and their applications
Controlled morphogenesis and self-assembly of bismutite nanocrystals into three-dimensional nanostructures and their applications
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DOI：
10.1039/c3ta14587e
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发表时间：
2014-01
影响因子：
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通讯作者：
Xinyi Zhang;Yuanhui Zheng;D. McCulloch;L. Yeo;J. Friend;D. Macfarlane
中科院分区：
文献类型：
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作者：
Xinyi Zhang;Yuanhui Zheng;D. McCulloch;L. Yeo;J. Friend;D. Macfarlane
我们报道了具有完全可调形貌的铋铁矿纳米晶的形态发生和自组装，从正方形平板、八角形薄片和圆形圆盘到三维分级纳米结构。结果表明，铋纳米晶的成核、生长和自组装强烈依赖于氢氧化物和柠檬酸根离子之间的协同作用。三维层状纳米结构是通过铋纳米晶沿<001>方向定向附着而形成的。铋矿分级纳米结构可用于高效、选择性的吸附分离。研制了一种基于铋/金纳米粒子核壳结构的表面增强拉曼光谱平台，用于芳香族分子的超灵敏检测，检测下限可达1 nm。
We report the morphogenesis and self-assembly of bismutite nanocrystals with fully tunable morphologies from square plates, octagonal sheets, and round disks into three-dimensional hierarchical nanostructures. The results show that the nucleation, growth and self-assembly of bismutite nanocrystals strongly depend on the synergistic effect between hydroxide and citrate ions. The three-dimensional hierarchical nanostructures are formed through an oriented-attachment of bismutite nanocrystals along the 〈001〉 directions. The bismutite hierarchical nanostructures can be utilized for efficient and selective adsorption and separation. A novel surface-enhanced Raman spectroscopy platform based on a bismutite/gold nanoparticles core–shell structure has been developed for ultrasensitive detection of aromatic molecules with a detection limit down to 1 nM.