Nanostructured titania films sensitized by quantum dot chalcogenides

Kontos, AG; Likodimos, V; Vassalou, E; Kapogianni, I; Raptis, YS; Raptis, C; Falaras, P

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