Rapid Large-Scale Assembly and Pattern Transfer of One-Dimensional Gold Nanorod Superstructures
Rana NMN Ashkar, Michael J. A. Hore, Xingchen Ye, Bharath NMN Natarajan, Nicholas J. Greybush, Thomas Lam, Christopher B. Murray
The utility of gold nanorods for plasmonic applications largely depends on the relative orientation and proximity of the nanorods within a material. Through previous studies have demonstrated methods that can generate side-by-side or chain-like nanorod morphologies, a simple reliable method to obtain high-yield oriented gold nanorod assemblies remains a significant challenge to date. Here, we present a scalable, facile approach which exploits meniscus drag, evaporative self-assembly and van der Waals interactions to precisely orient gold nanorods, over macroscopic areas, on 1D nanostructured substrates. By adjusting the ratio of the nanorod diameter to the groove width of the nanochannels, various translationally ordered nanorod patterns can be obtained. Specifically, when the nanorod diameter to the groove width of the nanochannels, various translationally ordered nanorod patterns can be obtained. Specifically, when the nanorod diameter is commensurate with the channel width, superstructures of end-to-end aligned nanorods form under the right conditions. We further demonstrate a method to transfer the aligned nanorods to a polymer substrate, which will allow for rapid fabrication and deployment of flexible optical and electronic materials in future nanoscale devices.
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Rapid Large-Scale Assembly and Pattern Transfer of One-Dimensional Gold Nanorod Superstructures, ACS Applied Materials and Interfaces, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=919606
(Accessed November 29, 2023)