AI Article Synopsis
- Researchers created ideal dimers of gold nanoparticles with smooth surfaces and high sphericity using a unique assembly strategy that efficiently removes cetyltrimethylammonium bromide.
- These dimers exhibit exceptional structural and plasmonic uniformity at the single-particle level, eliminating inconsistencies caused by variations in particle gaps.
- Analysis via polarization-resolved dark-field scattering spectroscopy allowed for the distinction of different plasmon coupling modes, with supporting evidence from computer simulations.
Article Abstract
Ideal dimers comprising gold nanoparticles with a smooth surface and high sphericity are synthesized by a substrate-based assembly strategy with efficient cetyltrimethylammonium bromide removal. An unprecedented structural and plasmonic uniformity at the single-particle level is observed since inhomogeneities resulting from variations in gap morphology are eliminated. Single ideal dimers are analyzed by polarization-resolved dark-field scattering spectroscopy. Contributions from transverse as well as quadrupolar and octupolar longitudinal plasmon coupling modes can be discriminated because of their orthogonal polarization behavior. The assignment of these higher order coupling modes is supported by computer simulations.
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| http://dx.doi.org/10.1002/smll.201702754 | DOI Listing |
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