拉曼光谱
纳米颗粒
密度泛函理论
锂(药物)
拉曼散射
吸收(声学)
材料科学
分析化学(期刊)
吸收光谱法
化学
纳米技术
光学
计算化学
有机化学
复合材料
医学
物理
内分泌学
作者
Ramón A. Alvarez,M. Cortez-Valadez,R. Britto Hurtado,L.O. Bueno,N. S. Flores-López,A.R. Hernández-Martínez,R. Gámez-Corrales,R.A. Vargas-Ortíz,J.-G. Bocarando-Chacon,H. Arizpe‐Chávez,M. Flores-Acosta
标识
DOI:10.1016/j.vibspec.2015.02.001
摘要
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 (Lin, n = 2–18) are incorporated. A radial breathing mode (RMB) type Raman mode was found for the case Lin (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.
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