International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan.
Nanoscale. 2012 Apr 21;4(8):2658-62. doi: 10.1039/c2nr11835a. Epub 2012 Feb 1.
Based on the self-ordering behavior of ionic liquids on solid surface, a gold ion containing ionic liquid was employed to obtain a uniform pattern of gold nanoparticles on Si substrate. Using this catalytic pattern, super-dense, centimetre long, well-crystallized and vertically-aligned ZnS nanowire arrays were then generated. It was found that the densely-packed gold nanoparticles played a key role in the nanowire alignment. Furthermore, the field-emission measurements show that the present ultralong ZnS nanowires arrays possess a low turn-on field of 3.69 V μm(-1) and a high field-enhancement factor of 1215.4, indicating they are valuable field emitters.
基于离子液体在固体表面的自组装行为，我们采用一种含金离子的离子液体，在硅衬底上获得了金纳米粒子的均匀图案。利用这种催化图案，我们进一步生成了超密集、厘米长、结晶良好且垂直排列的 ZnS 纳米线阵列。研究发现，密集排列的金纳米粒子在纳米线的排列中起着关键作用。此外，场发射测量表明，本研究中超长的 ZnS 纳米线阵列具有低的开启电场（3.69 V μm(-1)）和高的场增强因子（1215.4），表明它们是有价值的场发射体。
