Electronic coupling of colloidal CdSe nanocrystals monitored by thin-film positron-electron momentum density methods

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dc.creatorEijt, S. W. H.
dc.creatorMijnarends, P. E.
dc.creatorvan Schaarenburg, L. C.
dc.creatorHoutepen, A. J.
dc.creatorVanmaekelbergh, D.
dc.creatorBarbiellini, B.
dc.creatorBansil, A.
dc.date2009-02-17
dc.date.accessioned2026-07-07T12:50:14Z
dc.date.available2026-07-07T12:50:14Z
dc.descriptionThe effect of temperature controlled annealing on the confined valence electron states in CdSe nanocrystal arrays, deposited as thin films, was studied using two-dimensional angular correlation of annihilation radiation (2D-ACAR). A reduction in the intensity by ~35% was observed in a feature of the positron annihilation spectrum upon removal of the pyridine capping molecules above 200 degrees Celsius in a vacuum. This reduction is explained by an increased electronic interaction of the valence orbitals of neighboring nanocrystals, induced by the formation of inorganic interfaces. Partial evaporation of the nanoporous CdSe layer and additional sintering into a polycrystalline thin film was observed at a relatively low temperature of ~486 degrees Celsius.
dc.descriptionThe article has been accepted by Applied Physics Letters. After it is published, it will be found at http://apl.aip.org
dc.identifierhttps://arxiv.org/abs/0902.2819
dc.identifierhttp://arxiv.org/abs/0902.2819
dc.identifierAppl. Phys. Lett. 94, 091908 (2009)
dc.identifierdoi:10.1063/1.3094751
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/222625
dc.subjectMaterials Science
dc.titleElectronic coupling of colloidal CdSe nanocrystals monitored by thin-film positron-electron momentum density methods
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