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Ordered arrays of large latex particles organised by vertical deposition

 
: Goldenberg, L.M.; Wagner, J.; Stumpe, J.; Paulke, B.-R.; Gornitz, E

:

Materials Science and Engineering, C. Biomimetic and supramolecular systems Biomimetic materials, sensors and systems 22 (2002), Nr.2, S.405-408
ISSN: 0928-4931
Englisch
Zeitschriftenaufsatz
Fraunhofer IAP ()
large latex particle; vertical deposition; ordered array; ordered multilayer film; micrometer-sized monodisperse latex particle; submicrometer-sized monodisperse latex particle; hydrophobic polystyrene; three dimensional lattice; transmission visible-near infrared spectroscopy; Bragg peak; Fabry-Perot resonance; optical property; laser diffraction; Betrand lens; optical microscope; hydrophilic core-shell particle; 0.2 to 2.5 micron

Abstract
The simple preparation of the ordered multilayer films of submicrometerand micrometer-sized monodisperse latex particles in the range of 0.2-2.5 mu m is reported. The films were prepared from aqueous suspensions by vertical deposition at elevated temperatures. Both hydrophobic polystyrene (PS) and hydrophilic core-shell particles allowed good arrays formation. 3D lattice was proved by transmission and reflectance VIS-NIR spectroscopy. Well-developed Bragg peaks of up to 3200 nm have been registered. An observation of Fabry-Perot resonances in the spectra confirms good array quality. The optical properties of the grating were investigated by laser diffraction and by diffraction via an optical microscope equipped with a Betrand lens.

: http://publica.fraunhofer.de/dokumente/N-16643.html