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High Refractive Index Materials of Iron Sulfides and Poly(ethylene oxide)

Published online by Cambridge University Press:  31 January 2011

Tasoula Kyprianidou-Leodidou ,
Hans-Jörg Althaus ,
Yves Wyser ,
Daniel Vetter ,
Michele Büchler ,
Walter Caseri  and
Ulrich W. Suter
Tasoula Kyprianidou-Leodidou
Affiliation:
Eidgenössische Technische Hochschule, Institut für Polymere, ETH-Zentrum, CH-8092 Zürich, Switzerland and Eidgenössische Materialprüfungsund Forschungsanstalt, Abt. 136, CH-8600 Dübendorf, Switzerland
Hans-Jörg Althaus
Affiliation:
Eidgenössische Technische Hochschule, Institut für Polymere, ETH-Zentrum, CH-8092 Zürich, Switzerland and Eidgenössische Materialprüfungsund Forschungsanstalt, Abt. 136, CH-8600 Dübendorf, Switzerland
Yves Wyser
Affiliation:
Eidgenössische Technische Hochschule, Institut für Polymere, ETH-Zentrum, CH-8092 Zürich, Switzerland and Eidgenössische Materialprüfungsund Forschungsanstalt, Abt. 136, CH-8600 Dübendorf, Switzerland
Daniel Vetter
Affiliation:
Eidgenössische Technische Hochschule, Institut für Polymere, ETH-Zentrum, CH-8092 Zürich, Switzerland and Eidgenössische Materialprüfungsund Forschungsanstalt, Abt. 136, CH-8600 Dübendorf, Switzerland
Michele Büchler
Affiliation:
Eidgenössische Technische Hochschule, Institut für Polymere, ETH-Zentrum, CH-8092 Zürich, Switzerland and Eidgenössische Materialprüfungsund Forschungsanstalt, Abt. 136, CH-8600 Dübendorf, Switzerland
Walter Caseri
Affiliation:
Eidgenössische Technische Hochschule, Institut für Polymere, ETH-Zentrum, CH-8092 Zürich, Switzerland and Eidgenössische Materialprüfungsund Forschungsanstalt, Abt. 136, CH-8600 Dübendorf, Switzerland
Ulrich W. Suter
Affiliation:
Eidgenössische Technische Hochschule, Institut für Polymere, ETH-Zentrum, CH-8092 Zürich, Switzerland and Eidgenössische Materialprüfungsund Forschungsanstalt, Abt. 136, CH-8600 Dübendorf, Switzerland
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Abstract

High refractive index composites of iron sulfides and poly(ethylene oxide) (PEO) have been prepared by co-precipitation from aqueous solution. Several reaction parameters were varied: inorganic reactants, reactant ratios, reaction temperatures, and reaction times. Selected samples were characterized with organic microelemental analysis, x-ray fluorescence spectroscopy, x-ray diffraction, DSC, and TEM. The nanocomposites with the highest refractive indices have been prepared using PEO, Mohr's salt, and H2S or NaHS. The analyses indicate that the iron sulfides in these materials consist of finely dispersed mackinawite and greigite (“amorphous” FeS) and, partially, also pyrite. The refractive indexes of the resulting composites are clearly above 2 at 632.8 and 1295 nm and can assume values between 2.5 and 2.8.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 8 , August 1997 , pp. 2198 - 2206
Copyright
Copyright © Materials Research Society 1997

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