Designing Hybrid Plasmonic Superlattices with Spatially Confined Responsive Heterostructural Units
Liu J. Luo H. Li Z. Peng Y. Zhang J. Khaniyev B. Mukhametkarimov Y. Ibraimov M. Xu Y.
15 January 2025American Chemical Society
Nano Letters
2025#25Issue 2754 - 761 pp.
Plasmonic superlattices enable the precise manipulation of electromagnetic fields at the nanoscale. However, the optical properties of static lattices are dictated by their geometry and cannot be reconfigured. Here, we present a surface-interface engineered plasmonic superlattice with confined polyelectrolyte-functionalized metal-organic framework (MOF) hybrid layers to tune plasmon resonance for ultrafast chemical sensing. The surface lattice resonance frequency in the visible spectrum was achieved using electron-beam lithography with a humidity-responsive polyelectrolyte brush grafted onto the thiol-initiator-modified gold nanoparticle surface through atom transfer radical polymerization. An MOF thin film was assembled on the polyelectrolyte-functionalized gold nanoparticle lattice via a layer-by-layer immersion. Surface lattice resonance was observed without additional matched dielectric environment around the NPs, and the resonance frequency was tuned by adjusting the thickness and refractive index of the polyelectrolyte layer. Furthermore, high chemical sensitivity and ultrafast response were achieved due to the coherence between the MOFs and polymer layers.
light−matter interactions , MOFs , plasmonic nanoparticle lattices , PSPMK , sensing
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State Key Laboratory of Solidification Processing, Center of Advanced Lubrication and Seal Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, China
Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China
Department of Physics and Technology, Al-Farabi Kazakh National University, Al-Farabi av. 71, Almaty, 050040, Kazakhstan
State Key Laboratory of Solidification Processing
Institute of Advanced Magnetic Materials
Department of Physics and Technology
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