Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371, Singapore.
Nano Lett. 2013 Sep 11;13(9):4562-8. doi: 10.1021/nl402741j. Epub 2013 Aug 28.
High-quality metal oxide/conducting polymer (CP) heterostructured nanoarrays are fabricated by controllable electrochemical polymerization of CP shells on preformed metal oxides nanostructures for both electrochromic and electrochemical energy storage applications. Coaxial and branched CP shells can be obtained on different backbones (nanowire, nanorod, and nanoflake) simply by controlling the electrodeposition time. "Solvophobic" and "electrostatic" interactions are proposed to account for the preferential growth of CP along metal oxides to form core/shell heterostructures. The coaxial TiO2/polyaniline core/shell nanorod arrays exhibit remarkable electrochromic performance with rich color changes, fast optical modulation, and superior cycling stability. In addition, the Co3O4/polyaniline core/shell nanowire arrays are evaluated as an anode material of Li ion battery and exhibit enhanced electrochemical property with higher and more stable capacity than the bare Co3O4 nanowires electrode. These unique organic-inorganic heterostructures with synergy pave the way for developing new functional materials with enhanced properties or new applications.
通过在预先形成的金属氧化物纳米结构上可控电化学聚合 CP 壳，制备了高质量的金属氧化物/导电聚合物 (CP) 异质结构纳米阵列，可用于电致变色和电化学储能应用。通过简单地控制电沉积时间，可以在不同的骨架（纳米线、纳米棒和纳米片）上获得同轴和分支 CP 壳。提出了“疏溶剂”和“静电”相互作用来解释 CP 优先沿着金属氧化物生长以形成核/壳异质结构。同轴 TiO2/聚苯胺核/壳纳米棒阵列表现出显著的电致变色性能，具有丰富的颜色变化、快速的光学调制和优异的循环稳定性。此外，Co3O4/聚苯胺核/壳纳米线阵列被评估为锂离子电池的阳极材料，与裸 Co3O4 纳米线电极相比，表现出增强的电化学性能，具有更高和更稳定的容量。这些具有协同作用的独特有机-无机异质结构为开发具有增强性能或新应用的新型功能材料铺平了道路。
