Vertically aligned and ordered hematite hierarchical columnar arrays for applications in field-emission, superhydrophilicity, and photocatalysis
Vertically aligned and ordered hematite hierarchical columnar arrays for applications in field-emission, superhydrophilicity, and photocatalysis
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DOI：
10.1039/b922322c
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发表时间：
2010-03
影响因子：
--
通讯作者：
Liang Li;N. Koshizaki
中科院分区：
文献类型：
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作者：
Liang Li;N. Koshizaki
利用脉冲激光沉积(PLD)技术，以聚苯乙烯(PS)胶体微球为模板，制备了垂直排列、有序排列的赤铁矿层状柱状阵列。结晶赤铁矿六方密排柱状阵列是在室温下制备的，在450°C的热处理温度下可以转变为六方非密排柱状阵列。层次化的柱状阵列由组装的纳米板或纳米颗粒组成，取决于PLD过程中的氧分压。赤铁矿层状柱状阵列的场发射、表面润湿和光催化性能的提高归功于其独特的超结构和受控成分。
We achieved the vertically aligned and ordered hematite hierarchical columnar arrays using pulsed laser deposition (PLD) with polystyrene (PS) colloid spheres as templates. Crystallized hematite hexagonal-close-packed columnar arrays are fabricated at room temperature and can be transformed to hexagonal-non-close-packed columnar arrays at an annealing temperature of 450 °C. The hierarchical columns consist of assembled nanoplates or nanoparticles, depending on the oxygen pressures during the PLD process. The improved performance in field emission (FE), surface wetting, and photocatalytic properties of the hematite hierarchical columnar arrays is due to the unique morphology of the superstructures and controlled compositions.