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Nanostructured titania films sensitized by quantum dot chalcogenides

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dc.contributor.author Kontos, AG en
dc.contributor.author Likodimos, V en
dc.contributor.author Vassalou, E en
dc.contributor.author Kapogianni, I en
dc.contributor.author Raptis, YS en
dc.contributor.author Raptis, C en
dc.contributor.author Falaras, P en
dc.date.accessioned 2014-03-01T01:36:22Z
dc.date.available 2014-03-01T01:36:22Z
dc.date.issued 2011 en
dc.identifier.issn 19317573 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/21296
dc.subject Band Gap en
dc.subject Near Infrared en
dc.subject Size Effect en
dc.subject Structural Properties en
dc.subject Visible Light en
dc.subject Electron Transfer en
dc.subject Quantum Dot en
dc.subject Successive Ionic Layer Adsorption and Reaction en
dc.subject.other Air exposure en
dc.subject.other CdS en
dc.subject.other Degradation effect en
dc.subject.other Direct growth en
dc.subject.other Excitonic emission en
dc.subject.other Interfacial electron transfer en
dc.subject.other Lead sulfide en
dc.subject.other Mesoporous TiO en
dc.subject.other Micro-Raman en
dc.subject.other Nanostructured titania films en
dc.subject.other Near-infrared range en
dc.subject.other Optical absorbance en
dc.subject.other Photoluminescence measurements en
dc.subject.other Quantum size effects en
dc.subject.other Spectral range en
dc.subject.other Successive ionic layer adsorption and reactions en
dc.subject.other TiO en
dc.subject.other Tunabilities en
dc.subject.other Visible light en
dc.subject.other Adsorption en
dc.subject.other Cadmium en
dc.subject.other Cadmium compounds en
dc.subject.other Cadmium sulfide en
dc.subject.other Chalcogenides en
dc.subject.other Degradation en
dc.subject.other Semiconductor quantum dots en
dc.subject.other Titanium dioxide en
dc.title Nanostructured titania films sensitized by quantum dot chalcogenides en
heal.type journalArticle en
heal.identifier.primary 10.1186/1556-276X-6-266 en
heal.identifier.secondary http://dx.doi.org/10.1186/1556-276X-6-266 en
heal.publicationDate 2011 en
heal.abstract The optical and structural properties of cadmium and lead sulfide nanocrystals deposited on mesoporous TiO2 substrates via the successive ionic layer adsorption and reaction method were comparatively investigated by reflectance, transmittance, micro-Raman and photoluminescence measurements. Enhanced interfacial electron transfer is evidenced upon direct growth of both CdS and PbS on TiO2 through the marked quenching of their excitonic emission. The optical absorbance of CdS/TiO2 can be tuned over a narrow spectral range. On the other side PbS/TiO2 exhibits a remarkable band gap tunability extending from the visible to the near infrared range, due to the distinct quantum size effects of PbS quantum dots. However, PbS/TiO2 suffers from severe degradation upon air exposure. Degradation effects are much less pronounced for CdS/TiO2 that is appreciably more stable, though it degrades readily upon visible light illumination. © 2011 Kontos et al. en
heal.journalName Nanoscale Research Letters en
dc.identifier.doi 10.1186/1556-276X-6-266 en
dc.identifier.volume 6 en
dc.identifier.issue 1 en
dc.identifier.spage X1 en
dc.identifier.epage 6 en


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