Rapid Large-Scale Assembly and Pattern Transfer of One-Dimensional Gold Nanorod SuperstructuresClick to copy article linkArticle link copied!
- Rana Ashkar
- Michael J. A. Hore
- Xingchen Ye
- Bharath Natarajan
- Nicholas J. Greybush
- Thomas Lam
- Cherie R. Kagan
- Christopher B. Murray
Abstract

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 nanostructured 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.
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