Rapid Large-Scale Assembly and Pattern Transfer of One-Dimensional Gold Nanorod Superstructures
Rapid Large-Scale Assembly and Pattern Transfer of One-Dimensional Gold Nanorod Superstructures
复制标题
DOI：
10.1021/acsami.7b06273
复制
发表时间：
2017-08-02
影响因子：
9.5
通讯作者：
Murray, Christopher B.
中科院分区：
文献类型：
--
作者：
Ashkar, Rana;Hore, Michael J. A.;Murray, Christopher B.
金纳米棒在等离子体中的应用很大程度上取决于纳米棒的相对取向和接近度。虽然以前已经证明了并排或链状纳米棒的形态，但获得高产量定向金纳米棒组件的简单可靠方法仍然是一个重大挑战。我们提出了一种简单、可扩展的方法，利用半月板阻力、蒸发自组装和范德华相互作用，在一维纳米结构衬底的宏观区域上精确定位和定向金纳米棒。通过调整纳米棒直径与纳米通道宽度的比例，我们展示了两种高度期望的平移有序纳米棒图案的形成。我们进一步展示了一种将对齐的纳米棒转移到具有各向异性光学特性的聚合物基体中的方法，从而允许在未来的纳米级器件中快速制造和部署柔性光学和电子材料。
The utility of gold nanorods for plasmonic applications largely depends on the relative orientation and proximity of the nanorods. Though side-by-side or chainlike nanorod morphologies have been previously demonstrated, a simple reliable method to obtain high-yield oriented gold nanorod assemblies remains a significant challenge. We present a facile, scalable approach which exploits meniscus drag, evaporative self assembly, and van der Waals interactions to precisely position and orient gold nanorods over macroscopic areas of 1D nano structured substrates. By adjusting the ratio of the nanorod diameter to the width of the nanochannels, we demonstrate the formation of two highly desired translationally ordered nanorod patterns. We further demonstrate a method to transfer the aligned nanorods into a polymer matrix which exhibits anisotropic optical properties, allowing for rapid fabrication and deployment of flexible optical and electronic materials in future nanoscale devices.