Engineering Fractal Photonic Metamaterials by Stochastic Self‐Assembly of Nanoparticles
نویسندگان
چکیده
The scale-invariant features of fractal-structured materials offer significant opportunities for the manipulation short- and long-range light–matter interactions in a 3D space, with recent photonics applications including biomolecular sensing visible-blind photodetectors. development synthesis methods large-scale fabrication fractal metamaterials tuneable hierarchy bears potential is focus many research fields. Among various routes, Brownian's motion-driven coagulation nanomaterials, below their sintering temperature, leads to fractal-like structures presenting self-similar properties at different length scales. Herein, an in-depth investigation obtained via scalable self-assembly hot aerosols TiO2, Bi2O3, Au-Bi2O3 nanoparticles, chosen as representative photonic materials, reported. these aerosol-synthesized nanoparticle powders thin films are systematically investigated small-angle X-ray scattering (SAXS), image analysis, theoretical modeling. It demonstrated that diffusion-limited aggregation (DLA) regime dimensions preserved range 1.75–1.83 during formation agglomerates, independently material. These findings provide flexible platform engineering macroscale nanomaterials hierarchical ranging from energy harvesting photocatalysis sensing.
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ژورنال
عنوان ژورنال: Advanced photonics research
سال: 2021
ISSN: ['2699-9293']
DOI: https://doi.org/10.1002/adpr.202100020