Abstract
In this study, PbSe nanocubes were obtained by high-energy milling, and their optical properties were investigated by measuring the UV–VIS–IR spectra in the range of 200–2,000 nm. The optical absorption of all samples showed a strong UV emission band at 1.45 eV. Previously, to obtain only PbSe nanocubes, an intermediate phase was identified, PbSeO3. Although both PbSeO3 and PbSe were traced through this study, a major effort is devoted to characterize the latter. To trace how chemical transitions evolve from precursors to PbSe, X-ray diffraction and Rietveld refinement were carried out. Therefore, the following parameters were evaluated as a function of milling time: phase percentages, area-to-volume ratio, average crystallite dimensions, specific surface area, and morphology changes. To corroborate previous findings, nitrogen adsorption and transmission electron microscopy techniques were used. All the set experimental results unambiguously confirm that crystallites show a cubic morphology, with its average crystallite size distribution being around 24 nm.
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Abbreviations
- HEM:
-
High-energy milling
- XRD:
-
X-ray diffraction
- TEM:
-
Transmission electron microscopy
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Acknowledgments
This study was partially supported by the Consejo Nacional de Ciencia y Tecnología de México (CONACyT) and by the project of the Slovak Grant Agency (VEGA-2/0043/11). One of the authors (H. Rojas-Chávez) would like to thank CONACyT for their financial support. The authors are grateful to M. Aguilar-Franco (IF-UNAM) for his technical support. One of the authors (H. Rojas-Chávez) would like to thank Prof. Xim Bokhimi (IF-UNAM) for his valuable course about Rietveld analysis.
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Rojas-Chávez, H., Reyes-Carmona, F., Achimovičová, M. et al. PbSe nanocubes obtained by high-energy milling. J Nanopart Res 14, 897 (2012). https://doi.org/10.1007/s11051-012-0897-2
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DOI: https://doi.org/10.1007/s11051-012-0897-2