English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/148777
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Confinement and surface effects on the physical properties of rhombohedral-shape hematite (α-Fe2O3) nanocrystals

AuthorsLuna, Carlos; Cuán-Guerra, Aída D.; Barriga-Castro, E. D.; Núñez, Nuria O. ; Mendoza-Reséndez, R.
Issue Date2016
PublisherPergamon Press
CitationMaterials Research Bulletin 80: 44- 52 (2016)
AbstractMorphological, microstructural and vibrational properties of hematite (α-FeO) nanocrystals with a rhombohedral shape and rounded edges, obtained by forced hydrolysis of iron(III) solutions under a fast nucleation, have been investigated in detail as a function of aging time. These studies allowed us to propose a detailed formation mechanism and revealed that these nanocrystals are composed of four {104} side facets, two {110} faces at the edges of the long diagonal of the nanocrystals and two {-441} facets as the top and bottom faces. Also, the presence of nanoscopic pores and fissures was evidenced. The vibrational bands of such nanocrystals were shifted to lower frequencies in comparison with bulk hematite ones as the nanocrystal size was reduced due to phonon confinement effects. Also, the indirect and direct transition band gaps displayed interesting dependences on the aging time arising from quantum confinement and surface effects
Identifiersdoi: 10.1016/j.materresbull.2016.03.029
issn: 0025-5408
Appears in Collections:(ICMS) Artículos
Files in This Item:
File Description SizeFormat 
Nuria.pdf2,14 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.