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Sensors 2014, 14(7), 12207-12218; doi:10.3390/s140712207
Article

Vapor Responsive One-Dimensional Photonic Crystals from Zeolite Nanoparticles and Metal Oxide Films for Optical Sensing

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Received: 17 April 2014; in revised form: 25 June 2014 / Accepted: 4 July 2014 / Published: 9 July 2014
(This article belongs to the Section Chemical Sensors)
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Abstract: The preparation of responsive multilayered structures with quarter-wave design based on layer-by-layer deposition of sol-gel derived Nb2O5 films and spin-coated MEL type zeolite is demonstrated. The refractive indices (n) and thicknesses (d) of the layers are determined using non-linear curve fitting of the measured reflectance spectra. Besides, the surface and cross-sectional features of the multilayered structures are characterized by scanning electron microscopy (SEM). The quasi-omnidirectional photonic band for the multilayered structures is predicted theoretically, and confirmed experimentally by reflectance measurements at oblique incidence with polarized light. The sensing properties of the multilayered structures toward acetone are studied by measuring transmittance spectra prior and after vapor exposure. Furthermore, the potential of the one-dimensional photonic crystals based on the multilayered structure consisting of Nb2O5 and MEL type zeolite as a chemical sensor with optical read-out is discussed.
Keywords: one-dimensional photonic crystals; nanosized zeolites; sol-gel Nb2O5; multilayered structures; optical sensors one-dimensional photonic crystals; nanosized zeolites; sol-gel Nb2O5; multilayered structures; optical sensors
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Lazarova, K.; Awala, H.; Thomas, S.; Vasileva, M.; Mintova, S.; Babeva, T. Vapor Responsive One-Dimensional Photonic Crystals from Zeolite Nanoparticles and Metal Oxide Films for Optical Sensing. Sensors 2014, 14, 12207-12218.

AMA Style

Lazarova K, Awala H, Thomas S, Vasileva M, Mintova S, Babeva T. Vapor Responsive One-Dimensional Photonic Crystals from Zeolite Nanoparticles and Metal Oxide Films for Optical Sensing. Sensors. 2014; 14(7):12207-12218.

Chicago/Turabian Style

Lazarova, Katerina; Awala, Hussein; Thomas, Sebastien; Vasileva, Marina; Mintova, Svetlana; Babeva, Tsvetanka. 2014. "Vapor Responsive One-Dimensional Photonic Crystals from Zeolite Nanoparticles and Metal Oxide Films for Optical Sensing." Sensors 14, no. 7: 12207-12218.



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