| Autor: |
R. Gámez-Corrales, R. A. Vargas-Ortiz, N.S. Flores-López, R. Britto-Hurtado, H. Arizpe-Chávez, Ramón A.B. Alvarez, L. Oscar Neira Bueno, J.-G. Bocarando-Chacon, M. Cortez-Valadez, M. Flores-Acosta, A. R. Hernández-Martínez |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Vibrational Spectroscopy. 77:5-9 |
| ISSN: |
0924-2031 |
| DOI: |
10.1016/j.vibspec.2015.02.001 |
| Popis: |
The first report on lithium nanoparticles synthesized experimentally is presented. The nanoparticles were obtained using the extract of Opuntia ficus-indica through “green synthesis”. The optical, structural and vibrational properties were studied through optical absorption, TEM microscopy and Raman spectroscopy. The particles show a size of approximately 5 nm. The absorption bands were found at 315 and 415 nm in the samples after the synthesis of the nanoparticles. One Raman band was detected at around 280 cm −1 . Several levels of approximation of the density functional theory and the Hartree–Fock method on the structural and vibrational study of the lithium clusters (Li n , n = 2–18) are incorporated. A radial breathing mode (RMB) type Raman mode was found for the case Li n ( n > 3) in the predicted Raman spectrum. This mode shows the highest relative intensity for each case, and a shift to lower wavenumbers when the amount of atoms in the cluster increases. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect