Magny-les-Hameaux, France
Magny-les-Hameaux, France

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Frunza L.,National Institute of Materials Physics Bucharest | Frunza S.,National Institute of Materials Physics Bucharest | Zgura I.,National Institute of Materials Physics Bucharest | Beica T.,National Institute of Materials Physics Bucharest | And 5 more authors.
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2010

Composites prepared from aerosil A380 and liquid crystals (LCs) of 4-n-alkyl-4′-cyanophenyl benzoate type, with four to six carbon atoms in the alkyl chain were investigated by infrared spectroscopy. Their high silica content (of 2-7 g aerosil/1 g of LC) was given by thermogravimetric investigations and allows the observation of a rather thin LC layer on the silica particles. Several surface species onto the external surface of the grains were demonstrated. Arguments are given that monomer and dimer species are present in the bulk cyanophenyl benzoate materials while bulk-like species along with hydrogen-bonded ones coexist in the so-called surface layer of the composites. The main interaction of LC molecules with the aerosil surface is by hydrogen bonding taking place with the involvement of the cyan group. There is a contribution of ester carbonyl group to these surface interactions but this cannot be well quantified. © 2009 Elsevier B.V. All rights reserved.


Osterman J.,NEMOPTIC | Madsen L.,NEMOPTIC | Angele J.,NEMOPTIC | Leblanc F.,NEMOPTIC | And 2 more authors.
48th Annual SID Symposium, Seminar, and Exhibition 2010, Display Week 2010 | Year: 2010

The single-polarizer BiNem LCD e-paper display is optimized for e-reading applications. By compensating with a biaxial half-wave retarder, contrast enhancement and increased viewing angles are realized, and parallax is eliminated with an internal reflector. Optimized AR/AG coating and diffuse adhesive improves the display legibility and reading comfort. Compatibility with internal-reflector aSi-TFT substrates is demonstrated.


Osterman J.,NEMOPTIC | Madsen L.,NEMOPTIC | Angele J.,NEMOPTIC | Leblanc F.,NEMOPTIC | And 2 more authors.
Digest of Technical Papers - SID International Symposium | Year: 2010

The single-polarizer BiNem LCD e-paper display is optimized for e-reading applications. By compensating with a biaxial half-wave retarder, contrast enhancement and increased viewing angles are realized, and parallax is eliminated with an internal reflector. Optimized AR/AG coating and diffuse adhesive improves the display legibility and reading comfort. Compatibility with internal-reflector aSi-TFT substrates is demonstrated. © 2010 SID.

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