White-light photoluminescence and photoactivation in cadmium sulfide embedded in mesoporous silicon dioxide templates studied by confocal laser scanning microscopy
| Autor: | Miguel Guerrero, Emma Rossinyol, Maria Dolors Baró, M. Rosado, Eva Pellicer, Onofre Castell, R. Domingo-Roca, Santiago Suriñach, Jordi Sort, Mónica Roldán |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Nanocomposite Photoluminescence Microscòpia confocal Silicon dioxide Nanotechnology Mesoporous silica CdS Confocal laser scanning microscopy Mesoporous silica Nanocasting Photoactivation SBA-15 SBA-16 White-light photoluminescence Nanocrystalline material Cadmium sulfide Surfaces Coatings and Films Electronic Optical and Magnetic Materials Sulfur de cadmi Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry Template chemistry Mesoporous material Fotoluminescència |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname Recercat: Dipósit de la Recerca de Catalunya Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) JOURNAL OF COLLOID AND INTERFACE SCIENCE r-FSJD: Repositorio Institucional de Producción Científica de la Fundació Sant Joan de Déu Fundació Sant Joan de Déu Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona r-FSJD. Repositorio Institucional de Producción Científica de la Fundació Sant Joan de Déu |
| ISSN: | 0021-9797 |
| Popis: | This is the author's version of a work that was accepted for publication in Journal of colloid and interface science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of colloid and interface science, [147, 1, (2013)] DOI10.1016/j.jcis.2013.06.022) SBA-15 and SBA-16 silica templates have been infiltrated with CdS by means of nanocasting using a hybrid precursor. The morphology and structure of both the SiO2@CdS nanocomposites and the silica-free CdS replicas have been characterized. The three-dimensional nanocrystalline CdS networks embedded in SBA-15 and SBA-16 silica templates exhibit broad photoluminescence (PL) spectra over the entire visible range, together with enhanced PL intensity compared to silica-free CdS replicas. These effects result from the role silica plays in passivating the surface of the CdS mesostructures. Furthermore, photoactivation is eventually observed during continuous illumination because of both structural and chemical surface odifications. Owing to this combination of properties, these materials could be appealing for solid-state lighting, where ultra-bright near-white PL emission is indispensable. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect