Fabrication of mesoporous metal chalcogenide nanoflake silica thin films and spongy mesoporous CdS and CdSe

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dc.citation.epage3705en_US
dc.citation.issueNumber12en_US
dc.citation.spage3695en_US
dc.citation.volumeNumber18en_US
dc.contributor.authorTürker, Y.en_US
dc.contributor.authorKarakaya, C.en_US
dc.contributor.authorDag, Ö.en_US
dc.date.accessioned2015-07-28T12:00:26Z
dc.date.available2015-07-28T12:00:26Z
dc.date.issued2012-02-16en_US
dc.departmentDepartment of Chemistryen_US
dc.description.abstractMesoporous silica metal oxide (ZnO and CdO) thin films have been used as metal ion precursors to produce the first examples of mesoporous silica metal sulfide (mesoSiO2@ZnS, meso-SiO2@CdS) or silica metal selenide (meso-SiO2@ZnSe, meso-SiO2@CdSe) thin films, in which the pore walls are made up of silica and metal sulfide or metal selenide nanoflakes, respectively. A gentle chemical etching with a dilute HF solution of the meso-SiO2@CdS (or mesoSiO2@CdSe) produces mesoporous cadmium sulfide (meso-CdS) (or cadmium selenide, meso-CdSe). Surface modified meso-CdS displays bright blue photoluminescence upon excitation with a UV light. The mesoporous silica metal oxides are formed as metal oxide nanoislands over the silica walls through a self-assembly process of a mixture of metal nitrate salt-two surfactants-silica source followed by calcination step. The reactions, between the H2S (or H2Se) gas and solid precursors, have been carried out at room temperature and monitored using spectroscopy and microscopy techniques. It has been found that these reactions are: 1) taking place through the diffusion of sulfur or selenium species from the top metal oxide layer to the silica metal oxide interface and 2) slow and can be stopped at any stage to obtain mesoporous silica metal oxide metal sulfide or silica metal oxide metal selenide intermediate thin films.en_US
dc.description.provenanceMade available in DSpace on 2015-07-28T12:00:26Z (GMT). No. of bitstreams: 1 10.1002-chem.201102643.pdf: 1245484 bytes, checksum: 9a40381462a7127265846ff1e6736d30 (MD5)en
dc.identifier.doi10.1002/chem.201102643en_US
dc.identifier.eissn1521-3765
dc.identifier.issn0947-6539
dc.identifier.urihttp://hdl.handle.net/11693/12178
dc.language.isoEnglishen_US
dc.publisherWiley Online Libraryen_US
dc.relation.isversionofhttp://dx.doi.org/10.1002/chem.201102643en_US
dc.source.titleChemistry - A European Journalen_US
dc.subjectMesoporous Materialsen_US
dc.subjectMetal Selenidesen_US
dc.subjectMetal Sulfidesen_US
dc.subjectNanomaterialsen_US
dc.subjectThin Filmsen_US
dc.titleFabrication of mesoporous metal chalcogenide nanoflake silica thin films and spongy mesoporous CdS and CdSeen_US
dc.typeArticleen_US

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