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Fabrication of silica nanopillars by templated etching using bimetallic nanoparticles for anti-reflection applications
K. Suresh Kumar,
Published in Elsevier B.V.
2018
Volume: 456
   
Pages: 915 - 922
Abstract
We report on the anti-reflection characteristics of silica nanopillars fabricated using bimetallic copper-silver nanoparticles as an etch mask. The particles were formed by dewetting and their size and shape were controlled by the film thickness and annealing conditions. Our results showed that annealing of a copper-silver film results in formation of segregated bimetallic nanoparticles. Using these bimetallic nanoparticles as a mask for reactive ion etching produced dual diameter nanopillars, compared to single diameter nanopillars for monometallic nanoparticles. The height and shape of the nanopillars were controlled by the initial film thickness, annealing temperature, and etching parameters. The fabricated silica nanopillars showed a reduction in reflectance as compared to the bare substrate in the UV–Vis-NIR range, and dual diameter nanopillars were better as compared to single diameter nanopillars. Increasing etch duration resulted in increase in pillar height and a further reduction in reflectance. These silica nanopillar structures can be used as anti-reflection coatings. © 2018 Elsevier B.V.
About the journal
JournalData powered by TypesetApplied Surface Science
PublisherData powered by TypesetElsevier B.V.
Open AccessNo
Concepts (18)
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    Annealing
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    Antireflection coatings
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    Fabrication
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    Film thickness
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    Reflection
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    Reflective coatings
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    Silica
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    Silver nanoparticles
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    Thin films
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    Annealing condition
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    Annealing temperatures
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    ANTI REFLECTION
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    Bimetallic nanoparticles
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    De-wetting
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    ETCHING PARAMETERS
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    NANOPILLAR STRUCTURES
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    Nanopillars
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    Reactive ion etching