Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.14279/1823
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lioudakis, Emmanouil | - |
dc.contributor.author | Othonos, Andreas S. | - |
dc.contributor.author | Hadjisavvas, George C. | - |
dc.contributor.author | Nassiopoulou, Androula Galiouna | - |
dc.contributor.author | Kelires, Pantelis C. | - |
dc.date.accessioned | 2010-02-18T06:50:04Z | en |
dc.date.accessioned | 2013-05-17T05:21:45Z | - |
dc.date.accessioned | 2015-12-02T09:48:20Z | - |
dc.date.available | 2010-02-18T06:50:04Z | en |
dc.date.available | 2013-05-17T05:21:45Z | - |
dc.date.available | 2015-12-02T09:48:20Z | - |
dc.date.issued | 2007-04 | - |
dc.identifier.citation | Physica E: Low-Dimensional Systems and Nanostructures, vol. 38, no. 1-2, pp. 128-134. | en_US |
dc.identifier.issn | 13869477 | - |
dc.identifier.uri | https://hdl.handle.net/20.500.14279/1823 | - |
dc.description.abstract | Spectroscopic 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.format | en_US | |
dc.language.iso | en | en_US |
dc.relation.ispartof | Physica E: Low-Dimensional Systems and Nanostructures | en_US |
dc.rights | © Elsevier | en_US |
dc.subject | Monte Carlo simulations | en_US |
dc.subject | Silicon nanocrystals | en_US |
dc.subject | Spectroscopic ellipsometry | en_US |
dc.subject | Optical properties | en_US |
dc.title | Quantum confinement and interface structure of Si nanocrystals of sizes 3–5 nm embedded in a-SiO2 | en_US |
dc.type | Article | en_US |
dc.affiliation | University of Crete | en |
dc.collaboration | University of Cyprus | en_US |
dc.collaboration | University of Crete | en_US |
dc.collaboration | IMEL/NCSR Demokritos | en_US |
dc.journals | Open Access | en_US |
dc.country | Cyprus | en_US |
dc.country | Greece | en_US |
dc.subject.field | Engineering and Technology | en_US |
dc.publication | Peer Reviewed | en_US |
dc.identifier.doi | 10.1016/j.physe.2006.12.020 | en_US |
dc.dept.handle | 123456789/54 | en |
dc.relation.issue | 1-2 | en_US |
dc.relation.volume | 38 | en_US |
cut.common.academicyear | 2007-2008 | en_US |
dc.identifier.spage | 128 | en_US |
dc.identifier.epage | 134 | en_US |
item.fulltext | No Fulltext | - |
item.languageiso639-1 | en | - |
item.grantfulltext | none | - |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.cerifentitytype | Publications | - |
item.openairetype | article | - |
crisitem.author.dept | Department of Mechanical Engineering and Materials Science and Engineering | - |
crisitem.author.faculty | Faculty of Engineering and Technology | - |
crisitem.author.orcid | 0000-0002-0268-259X | - |
crisitem.author.parentorg | Faculty of Engineering and Technology | - |
Appears in Collections: | Άρθρα/Articles |
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