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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

In Situ Growth of Bi Nanoparticles on NaBiO3, delta-, and beta-Bi2O3 Surfaces: Electron Irradiation and Theoretical Insights

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Assis, Marcelo [1] ; Carvalho de Oliveira, Marisa [2] ; Machado, Thales Rafael [1] ; Macedo, Nadia Guerra [1] ; Campos Costa, Joao Paulo [1] ; Gracia, Lourdes [2] ; Andres, Juan [2] ; Longo, Elson [1]
Total Authors: 8
[1] Fed Univ Sao Carlos UFSCar, LIEC, CDMF, POB 676, BR-13565905 Sao Paulo - Brazil
[2] UJI, Dept Analyt & Phys Chem, Castellon de La Plana 12071 - Spain
Total Affiliations: 2
Document type: Journal article
Source: Journal of Physical Chemistry C; v. 123, n. 8, p. 5023-5030, FEB 28 2019.
Web of Science Citations: 0

Herein, we present a combined experimental and theoretical study of the in situ growth of Bi nanoparticles on NaBiO3, delta-, and beta-Bi2O3 surfaces mediated by the electron beam of a high-resolution transmission electron microscope. Density functional theory and quantum theory of atoms in molecule calculations were used to gain a deeper insight into the experimental observations and to provide an atomistic basis for understanding the formation mechanism of Bi NPs on NaBiO3, delta-, and beta-Bi2O3 under electron beam irradiation. Analysis of the experimental data and electron density distributions suggests that the formation of Bi NPs can be related to the structural and electronic changes occurring within the octahedral {[}BiO6] clusters, and to a lesser extent, {[}NaO6] clusters, which serve as the constituent building blocks of NaBiO3. Our findings indicate that as a function of the number of added electrons, the formation of beta-Bi2O3 takes place first followed by the subsequent appearance of metallic Bi NPs generated in the crystal by electron beam irradiation. (AU)

FAPESP's process: 13/26671-9 - Theoretical and experimental study of multifunctional semiconductors
Grantee:Amanda Fernandes Gouveia
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC