| Full text | |
| Author(s): Show less - |
Mazzo, T. M.
[1]
;
Macario, L. R.
[2]
;
Gorup, L. F.
[3]
;
Bouquet, V
[4]
;
Deputier, S.
[4]
;
Ollivier, S.
[4]
;
Guilloux-Viry, M.
[4]
;
Albuquerque, A. R.
[5]
;
Sambrano, J. R.
[6]
;
La Porta, F. A.
[7]
;
Longo, E.
[2]
Total Authors: 11
|
| Affiliation: | [1] Fed Univ Sao Paulo UNIFESP, Inst Marine Sci, POB 11070-100, BR-11015020 Santos, SP - Brazil
[2] Univ Fed Sao Carlos UFSCar, CDMF, INCTMN, Rod Washington Luis Km 235, CP 676, BR-13565905 Sao Carlos, SP - Brazil
[3] Fed Univ Grande Dourados, Dept Chem, FACET, BR-79804970 Dourados, MS - Brazil
[4] Univ Rennes, UMR 6226, CNRS, Inst Sci Chim Rennes, Campus Beaulieu, F-35042 Rennes - France
[5] Univ Fed Rio Grande do Norte UFRN, Inst Quim, BR-59078970 Natal, RN - Brazil
[6] Sao Paulo State Univ UNESP, Modeling & Mol Simulat Grp, BR-17033360 Bauru, SP - Brazil
[7] Fed Technol Univ Parana UTFPR, Lab Nanotechnol & Computat Chem, BR-86036370 Londrina, Parana - Brazil
Total Affiliations: 7
|
| Document type: | Journal article |
| Source: | ACS APPLIED NANO MATERIALS; v. 2, n. 5, p. 2612-2620, MAY 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
This study systematically investigated the electronic, structural, and optical properties of MgTiO3 (MTO), LaNiO3 (LNO), and MgTiO3/LaNiO3 (MTO/LNO) nanostructured films grown on Si(100) substrates by the pulsed laser deposition method. The structural characterizations obtained by X-ray diffraction revealed a preferred (003) orientation for the MTO film, while the LNO film was polycrystalline. The diffraction peaks corresponded to a rhombohedral structure, which was confirmed by micro-Raman spectroscopy for both nanostructured films. The MTO/LNO heterostructure was polycrystalline and exhibited the diffraction peaks of both the MTO and the LNO phases. Additionally, the results revealed that the LNO films did not have a significant photoluminescence (PL) emission, while an intense broad infrared luminescence centered at 724 nm appeared for the MTO nanostructured film. Surprisingly, for the MTO/LNO heterostructure, the PL emission profile exhibited a dual-color emission with an intense broad luminescence in the blue region (maximum centered at 454 nm) and an intense near-infrared emission (maximum centered at 754 nm), respectively, mainly because of the effect of interface defects, which induced a significant change in the PL behavior. Therefore, our experimental results correlated with the theoretical simulations based on the periodic density functional theory formalism and contributed to a deeper understanding of the charge/energy transfer processes occurring in the MTO/LNO/Si interfaces, and toward the exploitation of the close relationship between the structure and properties of these new functional materials. (AU) | |
| FAPESP's process: | 13/07296-2 - CDMF - Center for the Development of Functional Materials |
| Grantee: | Elson Longo da Silva |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |