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Journal Articles Applied Physics Letters Year : 2014

Self-organized ordered silver nanoparticle arrays obtained by solid state dewetting

Abstract

Spontaneous dewetting of a silver layer on a templated silica substrate is proposed as a promisinglow-cost process to produce self-organized metallic nanostructures. Periodic gratings with invertedpyramid pattern and periods ranging from 200 to 1000 nm are fabricated by nanoimprint on a solgelsilica layer. A silver layer is then deposited on the templated substrate by magnetron sputteringand annealed to form an array of well-organized islands by solid-state dewetting. The resultingislands are shown to have reduced diameter and size dispersion compared to arrays obtained in thesame conditions on flat substrates. The density of defects in the periodic array is determined as afunction of silver layer thickness and is lower than 10% in optimal conditions. Optical transmissionspectra of periodic arrays are measured, showing extinction peaks that can be related to plasmonresonance. This resonance can be tuned by adjusting the period and particle diameter.
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hal-01086445 , version 1 (24-11-2014)

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A. Le Bris, F. Maloum, J. Teisseire, F. Sorin. Self-organized ordered silver nanoparticle arrays obtained by solid state dewetting. Applied Physics Letters, 2014, 105, pp.203102. ⟨10.1063/1.4901715⟩. ⟨hal-01086445⟩
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