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Type of publication: Straipsnis Clarivate Analytics Web of Science ar/ir Scopus / Article in Clarivate Analytics Web of Science or / and Scopus (S1)
Field of Science: Fizika / Physics (N002)
Author(s): Sabaitytė, J;Šimkienė, I;Babonas, G. J;Rėza, A;Baran, M;Szymczak, R;Vaišnoras, Rimantas;Rastenienė, Loreta;Golubev, V;Kurdyukov, D
Title: Physical studies of porphyrin-infiltrated opal crystals
Is part of: Materials science & engineering. C. , Vol. 27, iss.5-8 (2007)
Extent: p. 985-989
Date: 2007
Keywords: Opal;Hybrid structures;Optical properties
Abstract: Artificial opals made of silica spheres and infiltrated with aqueous solution of iron porphyrin (FeTPPS) possessing the absorption band in a visible spectral range were studied. The structural, optical and magnetic properties of composite structures were investigated. Bulk samples of opal structure were obtained by sedimentation technique from colloidal solution Of SiO2 spheres of diameter 240 and 245 nm. The structure of the samples was examined by atomic force microscopy. The properties of photonic crystals were demonstrated by optical measurements in transmission and reflection modes. The stop band was observed in the region 510-550 nm. In samples annealed at 900 degrees C the width of the stop band increased to similar to 70 nm. Aqueous solutions of FeTPPS of concentration similar to 1.0 mM and various pH-values were used for infiltration. The infiltration has led to a change of photonic characteristics, position of the stop band and dependence on light incidence angle. The absorption bands typical of FeTPPS were observed in the vicinity of the stop band. The photonic properties of infiltrated opal structures were determined to depend on the acidity of aqueous solution, which was used in technological procedure. Magnetic properties of FeTPPS-infiltrated opal samples, which have been studied at 5-300 K in magnetic fields up to 5 T, were discussed
Affiliation(s): Puslaidininkių fizikos institutas
Vytauto Didžiojo universitetas
Švietimo akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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