Thin Coatings of Cerium Oxide Nanoparticles with Anti-Reflective Properties

Laura J. Romasanta; Lauriane D’Alençon; Sara Kirchner; Christophe Pradere; Jacques Leng

doi:10.3390/app9183886

journal article Open Access Sep 16, 2019

Thin Coatings of Cerium Oxide Nanoparticles with Anti-Reflective Properties

Laura J. Romasanta Lauriane D’Alençon Sara Kirchner Christophe Pradere

Jacques Leng

Applied Sciences Vol. 9 No. 18 pp. 3886 · MDPI AG

View at Publisher Save 10.3390/app9183886

Abstract

Cerium oxide, in addition to its catalytic properties, is also known for its optical properties such as ultraviolet (UV) radiation filtering and a relatively high refractive index ( n > 2 ), which makes it an excellent candidate for multifunctional coatings. Here, we focus on the optical properties of thin deposits (≲2 μ m) of densely packed C e O 2 nanoparticles, which we assemble using two evaporation-based techniques: convective self-assembly (CSA, a type of very slow blade-coating) to fabricate large-scale coatings of controllable thickness—from tens of nanometres to a few micrometers—and microfluidic pervaporation which permits us to add some micro-structure to the coatings. Spectroscopic ellipsometry yields the refractive index of the resulting nano-porous coatings, which behave as lossy dielectrics in the UV-visible regime and loss-less dielectrics in the visible to infra-red (IR) regime; in this regime, the fairly high refractive index (≈1.8) permits us to evidence thickness-tunable anti-reflection on highly refractive substrates, such as silicon, and concomitant enhanced transmissions which we checked in the mid-IR region.

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Details

Published: Sep 16, 2019
Vol/Issue: 9(18)
Pages: 3886
License: View

Authors

L

Laura J. Romasanta

University of Bordeaux, Laboratory of the Future (CNRS/SOLVAY), 178 avenue du Docteur Schweitzer, 33600 Pessac, France

L

Lauriane D’Alençon

Solvay, Functional Inorganic Materials Laboratory, 52 rue de la Haie coq, 93300 Aubervillliers, France

S

Sara Kirchner

Institut d’ingénierie et de mécanique, TREFLE, Esplanade des Arts et Métiers, 33400 Talence, France

C

Christophe Pradere

Institut d’ingénierie et de mécanique, TREFLE, Esplanade des Arts et Métiers, 33400 Talence, France

J

Jacques Leng

University of Bordeaux, Laboratory of the Future (CNRS/SOLVAY), 178 avenue du Docteur Schweitzer, 33600 Pessac, France

Funding

Agence Nationale de la Recherche Award: 13-BS09-0010-01

Solvay Award: NA

Cite This Article

Laura J. Romasanta, Lauriane D’Alençon, Sara Kirchner, et al. (2019). Thin Coatings of Cerium Oxide Nanoparticles with Anti-Reflective Properties. Applied Sciences, 9(18), 3886. https://doi.org/10.3390/app9183886

Thin Coatings of Cerium Oxide Nanoparticles with Anti-Reflective Properties

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