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Πεδίο DCΤιμήΓλώσσα
dc.contributor.authorLioudakis, Emmanouil-
dc.contributor.authorOthonos, Andreas S.-
dc.contributor.authorHadjisavvas, George C.-
dc.contributor.authorNassiopoulou, Androula Galiouna-
dc.contributor.authorKelires, Pantelis C.-
dc.date.accessioned2010-02-18T06:50:04Zen
dc.date.accessioned2013-05-17T05:21:45Z-
dc.date.accessioned2015-12-02T09:48:20Z-
dc.date.available2010-02-18T06:50:04Zen
dc.date.available2013-05-17T05:21:45Z-
dc.date.available2015-12-02T09:48:20Z-
dc.date.issued2007-04-
dc.identifier.citationPhysica E: Low-Dimensional Systems and Nanostructures, vol. 38, no. 1-2, pp. 128-134.en_US
dc.identifier.issn13869477-
dc.identifier.urihttps://hdl.handle.net/20.500.14279/1823-
dc.description.abstractSpectroscopic ellipsometry and Monte Carlo simulations are employed to answer the fundamental question whether the energy gaps of Si nanocrystals with sizes in the range of 3–5 nm, which are embedded in amorphous silica, follow or deviate from the quantum confinement model, and to examine their interfacial structure. It is shown that the optical properties of these nanocrystals are well described by the Forouhi–Bloomer interband model. Analysis of the optical measurements over a photon-energy range of 1.5–5 eV shows that the gap of embedded nanocrystals with a mean size of 3.9 nm follows closely quantum confinement theory. A large band gap expansion (0.65 eV) compared to bulk Si is observed. The Monte Carlo simulations reveal a non-abrupt interface and a large fraction of interface oxygen bonds. This, in conjunction with the experimental observations, indicates that oxygen states and the chemical disorder at the interface have a negligible influence on the optical properties of the material in this size regime.en_US
dc.formatpdfen_US
dc.language.isoenen_US
dc.relation.ispartofPhysica E: Low-Dimensional Systems and Nanostructuresen_US
dc.rights© Elsevieren_US
dc.subjectMonte Carlo simulationsen_US
dc.subjectSilicon nanocrystalsen_US
dc.subjectSpectroscopic ellipsometryen_US
dc.subjectOptical propertiesen_US
dc.titleQuantum confinement and interface structure of Si nanocrystals of sizes 3–5 nm embedded in a-SiO2en_US
dc.typeArticleen_US
dc.affiliationUniversity of Creteen
dc.collaborationUniversity of Cyprusen_US
dc.collaborationUniversity of Creteen_US
dc.collaborationIMEL/NCSR Demokritosen_US
dc.journalsOpen Accessen_US
dc.countryCyprusen_US
dc.countryGreeceen_US
dc.subject.fieldEngineering and Technologyen_US
dc.publicationPeer Revieweden_US
dc.identifier.doi10.1016/j.physe.2006.12.020en_US
dc.dept.handle123456789/54en
dc.relation.issue1-2en_US
dc.relation.volume38en_US
cut.common.academicyear2007-2008en_US
dc.identifier.spage128en_US
dc.identifier.epage134en_US
item.fulltextNo Fulltext-
item.languageiso639-1en-
item.grantfulltextnone-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.cerifentitytypePublications-
item.openairetypearticle-
crisitem.author.deptDepartment of Mechanical Engineering and Materials Science and Engineering-
crisitem.author.facultyFaculty of Engineering and Technology-
crisitem.author.orcid0000-0002-0268-259X-
crisitem.author.parentorgFaculty of Engineering and Technology-
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