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Periodic Arrays of Diamond‐Shaped Silver Nanoparticles: From Scalable Fabrication by Template‐Assisted Solid‐State Dewetting to Tunable Optical Properties
Author(s) -
Jacquet Paul,
Bouteille Barbara,
Dezert Romain,
Lautru Joseph,
Podor Renaud,
Baron Alexandre,
Teisseire Jéremie,
Jupille Jacques,
Lazzari Rémi,
Gozhyk Iryna
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201901119
Subject(s) - dewetting , materials science , fabrication , nanotechnology , nanoscopic scale , substrate (aquarium) , photonics , nanoparticle , optoelectronics , granularity , nanoimprint lithography , plasmon , thin film , medicine , oceanography , alternative medicine , pathology , geology , computer science , operating system
Periodic arrays of anisotropic silver nanoparticles having peculiar optical properties are fabricated at a macroscopic scale. The proposed scalable method is based on temperature‐assisted solid‐state dewetting of a continuous thin layer deposited on a silica substrate patterned by the nanoimprint technique. The resulting nanoparticles are shaped like diamonds and are half‐embedded into the patterned silica. A period‐dependent optimum in film thickness for the quality of spatial organization is found and discussed in terms of thermodynamics and, for the first time, in terms of the role of grains in the dewetting process. The optical properties of the arrays are driven by not only simply the particle shape but also the lattice period and the degree of order. A surface lattice resonance that disperses with the underlying period is evidenced experimentally and confirmed by optical simulations. The opportunity to fabricate and tune such an assembly of plasmonic particles on transparent substrate opens interesting perspectives for not only fundamental photonics but also potential optical applications.