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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.)

Suppression of vapor-liquid-solid (VLS) mechanism in the growth of alpha-Sb2O4 nanobelts by a vapor-deposition approach

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Goncalves, Rosana A. [1] ; da Silva Barros, Herick H. [1] ; Araujo, Luana S. [1] ; Antunes, Erica F. [1] ; Quade, Antje [2] ; Teodoro, Marcio D. [3] ; Baldan, Mauricio R. [4] ; Berengue, Olivia M. [1]
Total Authors: 8
[1] Sao Paulo State Univ, Sch Engn, Dept Phys, UNESP, BR-12516410 Guaratingueta, SP - Brazil
[2] INP Greifswald, Felix Hausdorff Str 2, D-17489 Greifswald - Germany
[3] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil
[4] Natl Inst Space Res INPE, Dept Space Engn & Technol PDM3A, BR-12227010 Sao Jose Dos Campos, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Web of Science Citations: 0

In this work we report on the synthesis of novel alpha-Sb2O4 nanostructures synthesized by a gold catalyzed vapor deposition method in which metallic Sb is used as a precursor. Belts, rods and zigzag morphologies were obtained and characterized by a group of techniques which also provided data on crystalline structure and compositional aspects. Structural characterizations revealed that although the addition of gold nanoparticles plays an important role in the final growth of the nanostructures, no evidence of this element was found in the as-grown samples. In order to clarify the causes of the suppression of the VLS mechanism in these conditions, we carried out experiments in which the syntheses were interrupted in a controlled manner. Our findings revealed that at the early stages of the growth VLS mechanism is suppressed when high levels of Sb supersaturation are reached. A thick crystalline oxide layer rapidly grows at the liquid-gas interface providing preferential sites for the VS growth to take place. Low temperature photoluminescence measurements revealed a strong emission in the visible portion of electromagnetic spectra which can be associated to the presence of oxygen vacancies in these nanostructures. (AU)

FAPESP's process: 15/21816-4 - Growth of semiconductor nanostructures based on tin and antimony oxides: study of structural and electronic transport properties
Grantee:Olivia Maria Berengue
Support type: Regular Research Grants