title: Facile deposition of YSZ-inverse photonic glass films.
abstract: An alternative all-colloidal and single-step deposition method of yttrium-stabilized zirconia (YSZ)-infiltrated polymeric photonic glass films is presented. Heterocoagulation of oppositely charged polystyrene (PS) microspheres and YSZ nanocrystals in aqueous dispersions created PS/YSZ core-shell spheres. These composite particles were deposited on glass substrates by a simple drop-coating process. Heterocoagulation impaired self-assembly of the particles, resulting in a disordered structure. Burn-out of the polymer yielded a random array of YSZ shells. The effect of the filling fraction of YSZ between these shells was explored. YSZ-inverse photonic glass films with a thickness below 40 μm achieved 70% reflectance of the incident radiation over a broad wavelength range between 0.4 and 2.2 μm. The YSZ structures demonstrated structural stability up to 1000 °C and maintained high reflectance up to 1200 °C for several hours, thus enabling applications as broadband reflectors at elevated temperatures.
authors.affiliation: Institute of Advanced Ceramics, Hamburg University of Technology , Denickestrasse 15, 21073 Hamburg, Germany.
authors.forename: Jefferson J
authors.initials: JJ
authors.lastname: do Rosário
authors.forename: Pavel N
authors.initials: PN
authors.lastname: Dyachenko
authors.forename: Roman
authors.initials: R
authors.lastname: Kubrin
authors.forename: Robert M
authors.initials: RM
authors.lastname: Pasquarelli
authors.forename: Alexander Yu
authors.initials: AY
authors.lastname: Petrov
authors.forename: Manfred
authors.initials: M
authors.lastname: Eich
authors.forename: Gerold A
authors.initials: GA
authors.lastname: Schneider