Identifying and rationalizing the morphological, structural, and optical properties of β-Ag2MoO4 microcrystals, and the formation process of Ag nanoparticles on their surfaces: combining experimental data and first-principles calculations
We present a combined theoretical and experimental study on the morphological, structural, and optical properties of β-Ag2MoO4 microcrystals. β-Ag2MoO4 samples were prepared by a co-precipitation method. The nucleation and formation of Ag nanoparticles on β-Ag2MoO4 during electron beam irradiation w...
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doaj-550ac20436ab465696261efea79393502020-11-25T02:06:52ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142015-12-0116610.1088/1468-6996/16/6/06500211670481Identifying and rationalizing the morphological, structural, and optical properties of β-Ag2MoO4 microcrystals, and the formation process of Ag nanoparticles on their surfaces: combining experimental data and first-principles calculationsMaria T Fabbro0Carla Saliby1Larissa R Rios2Felipe A La Porta3Lourdes Gracia4Máximo S Li5Juan Andrés6Luís P S Santos7Elson Longo8Universidade Federal de São CarlosUniversidade Federal de São CarlosUniversidade Federal de São CarlosUniversidade Tecnológica Federal do ParanáUniversitat Jaume IInstituto de Física de São Carlos, Universidade de São PauloUniversitat Jaume IInstituto Federal do MaranhãoCDMF, INCTMN, Instituto de Química, Universidade Estadual PaulistaWe present a combined theoretical and experimental study on the morphological, structural, and optical properties of β-Ag2MoO4 microcrystals. β-Ag2MoO4 samples were prepared by a co-precipitation method. The nucleation and formation of Ag nanoparticles on β-Ag2MoO4 during electron beam irradiation were also analyzed as a function of electron beam dose. These events were directly monitored in real-time using in situ field emission scanning electron microscopy (FE-SEM). The thermodynamic equilibrium shape of the β-Ag2MoO4 crystals was built with low-index surfaces (001), (011), and (111) through a Wulff construction. This shape suggests that the (011) face is the dominating surface in the ideal morphology. A significant increase in the values of the surface energy for the (011) face versus those of the other surfaces was observed, which allowed us to find agreement between the experimental and theoretical morphologies. Our investigation of the different morphologies and structures of the β-Ag2MoO4 crystals provided insight into how the crystal morphology can be controlled so that the surface chemistry of β-Ag2MoO4 can be tuned for specific applications. The presence of structural disorder in the tetrahedral [MoO4] and octahedral [AgO6] clusters, the building blocks of β-Ag2MoO4, was used to explain the experimentally measured optical properties.http://dx.doi.org/10.1088/1468-6996/16/6/065002theoretical calculationsmorphologyelectron beam irradiationβ-ag2moo4 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Maria T Fabbro Carla Saliby Larissa R Rios Felipe A La Porta Lourdes Gracia Máximo S Li Juan Andrés Luís P S Santos Elson Longo |
spellingShingle |
Maria T Fabbro Carla Saliby Larissa R Rios Felipe A La Porta Lourdes Gracia Máximo S Li Juan Andrés Luís P S Santos Elson Longo Identifying and rationalizing the morphological, structural, and optical properties of β-Ag2MoO4 microcrystals, and the formation process of Ag nanoparticles on their surfaces: combining experimental data and first-principles calculations Science and Technology of Advanced Materials theoretical calculations morphology electron beam irradiation β-ag2moo4 |
author_facet |
Maria T Fabbro Carla Saliby Larissa R Rios Felipe A La Porta Lourdes Gracia Máximo S Li Juan Andrés Luís P S Santos Elson Longo |
author_sort |
Maria T Fabbro |
title |
Identifying and rationalizing the morphological, structural, and optical properties of β-Ag2MoO4 microcrystals, and the formation process of Ag nanoparticles on their surfaces: combining experimental data and first-principles calculations |
title_short |
Identifying and rationalizing the morphological, structural, and optical properties of β-Ag2MoO4 microcrystals, and the formation process of Ag nanoparticles on their surfaces: combining experimental data and first-principles calculations |
title_full |
Identifying and rationalizing the morphological, structural, and optical properties of β-Ag2MoO4 microcrystals, and the formation process of Ag nanoparticles on their surfaces: combining experimental data and first-principles calculations |
title_fullStr |
Identifying and rationalizing the morphological, structural, and optical properties of β-Ag2MoO4 microcrystals, and the formation process of Ag nanoparticles on their surfaces: combining experimental data and first-principles calculations |
title_full_unstemmed |
Identifying and rationalizing the morphological, structural, and optical properties of β-Ag2MoO4 microcrystals, and the formation process of Ag nanoparticles on their surfaces: combining experimental data and first-principles calculations |
title_sort |
identifying and rationalizing the morphological, structural, and optical properties of β-ag2moo4 microcrystals, and the formation process of ag nanoparticles on their surfaces: combining experimental data and first-principles calculations |
publisher |
Taylor & Francis Group |
series |
Science and Technology of Advanced Materials |
issn |
1468-6996 1878-5514 |
publishDate |
2015-12-01 |
description |
We present a combined theoretical and experimental study on the morphological, structural, and optical properties of β-Ag2MoO4 microcrystals. β-Ag2MoO4 samples were prepared by a co-precipitation method. The nucleation and formation of Ag nanoparticles on β-Ag2MoO4 during electron beam irradiation were also analyzed as a function of electron beam dose. These events were directly monitored in real-time using in situ field emission scanning electron microscopy (FE-SEM). The thermodynamic equilibrium shape of the β-Ag2MoO4 crystals was built with low-index surfaces (001), (011), and (111) through a Wulff construction. This shape suggests that the (011) face is the dominating surface in the ideal morphology. A significant increase in the values of the surface energy for the (011) face versus those of the other surfaces was observed, which allowed us to find agreement between the experimental and theoretical morphologies. Our investigation of the different morphologies and structures of the β-Ag2MoO4 crystals provided insight into how the crystal morphology can be controlled so that the surface chemistry of β-Ag2MoO4 can be tuned for specific applications. The presence of structural disorder in the tetrahedral [MoO4] and octahedral [AgO6] clusters, the building blocks of β-Ag2MoO4, was used to explain the experimentally measured optical properties. |
topic |
theoretical calculations morphology electron beam irradiation β-ag2moo4 |
url |
http://dx.doi.org/10.1088/1468-6996/16/6/065002 |
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