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- Title
Flexible mixed oxides thin films: zinc oxide/cadmium tungstate/chitosan for optical devices.
- Authors
Alamdari, Sanaz; Taheri, Saeed; Heydari, Esmaeil; Ara, Mohammad Hossein Majles
- Abstract
The rapid emergence of intelligent textile-based sensors has sparked considerable interest within the scientific community. A pivotal factor in advancing these sensors is the development of semiconductors with tailored band energy levels to enhance their optical properties. This enhancement primarily arises from efficient carrier separation and interfacial charge transfer processes. In pursuit of these objectives, our study presents a novel approach to fabricate flexible thin films composed of mixed oxides, specifically zinc oxide and cadmium tungstate (ZnO/CWO), within a chitosan (CS) matrix, utilizing a cost-effective method. We conducted a comprehensive characterization of the fabricated samples, encompassing structural, morphological, and optical analyses. Techniques such as X-ray diffraction (XRD), Raman spectroscopy, field-emission scanning electron microscopy (FESEM), iono/photoluminescence, and scintillation strategies were employed. The findings from XRD and Raman spectroscopy unequivocally confirm the presence of hexagonal ZnO and monoclinic CdWO4 structures within the thin film. Notably, the ZnO/CWO composite thin films exhibit robust emissions in the blue-green and orange spectral regions compared to pure CS at room temperature. This phenomenon occurs following excitation by a 290 nm wavelength light source and a proton beam serving as an ionizing radiation source. Furthermore, FESEM/TEM analysis reveals that the synthesized ZnO/CWO composite nanoparticles predominantly exhibit a diverse range of shapes, including cubic, rod-like, and spherical, with an average diameter size of approximately 20–80 nm, demonstrating excellent dispersion within the chitosan matrix. The results obtained in this study suggest that the prepared flexible composite film holds significant promise for future applications in adaptable optical devices.
- Subjects
ZINC oxide thin films; OPTICAL devices; TUNGSTATES; CHITOSAN; CADMIUM oxide; THIN films
- Publication
Optical & Quantum Electronics, 2024, Vol 56, Issue 3, p1
- ISSN
0306-8919
- Publication type
Article
- DOI
10.1007/s11082-023-06078-9