| 查看: 977 | 回复: 1 | |||
| 本帖产生 1 个 翻译EPI ，点击这里进行查看 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
[交流]
再求助一段有关拉曼光谱的文献英译中
|
|||
|
Fig. 4 shows the Raman spectra (LABRAMHR Confocal Laser MicroRaman spectrometer,514.5 nm, 250 mW) of the as-synthesized NiO nanorods. It can be seen that there are four Raman peaks at 420, 546, 712, and 1092 cm-1, espectively. Compared to the predicted data of cubic NiO single crystal [26], we can assigned the peaks at 420 and 546 cm-1 to the first-order transverse optical (TO) and longitudinal optical (LO) phonon modes of NiO, respectively. The emaining peaks at 712 and 1092 cm-1 can be assigned as combination of 2TO and 2LO, respectively, and are all shifted down in frequency about 68 cm-1. Since k = 0 phonons in the paramagnetic (cubic) phase transform as Γ-4 , no firstorder Raman scattering is expected. Therefore the observed first-order Raman peaks near the 420 (TO) and 546 cm-1 (LO) must derive from paritybreaking imperfections [26]. This conclusion is confirmed by the enhancement of the first-order Raman scattering in the black NiO, where the nickel vacancy concentration is high. The combination Raman scattering trends to vanish at the C point but is usually strong elsewhere in the Brillouin zone. This explains why the combination peaks are all shifted down in frequency, since both LO and TO branches are expected to be depressed in frequency away from the zone center. （Chemical Physics Letters 362 (2002) 119–122） |
回复此楼» 猜你喜欢
论文终于录用啦！满足毕业条件了
已经有10人回复
-
2025年遐想
已经有4人回复
-
投稿Elsevier的杂志（返修），总是在选择OA和subscription界面被踢皮球
已经有8人回复
-
自然科学基金委宣布启动申请书“瘦身提质”行动
已经有4人回复
-
求个博导看看
已经有18人回复