Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 30, Pages 25513-25521Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b06273
Keywords
gold nanorods; end-to-end assembly; controlled positional order; plasmonics; polymer nanocomposites
Funding
- National Science Foundation (NSF) [DMR-0944772]
- Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy
- ORNL's Neutron Sciences Directorate Clifford G. Shull Fellowship program
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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.
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