 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 2 | 1/1 | 返回列表 |
| 查看: 1041 | 回復(fù): 1 | |||
| 本帖產(chǎn)生 1 個 翻譯EPI ，點(diǎn)擊這里進(jìn)行查看 | |||
guoqiusong銀蟲 (初入文壇)
|
[交流]
再求助一段有關(guān)拉曼光譜的文獻(xiàn)英譯中
|
||
|
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） |
回復(fù)此樓» 猜你喜歡
招08考數(shù)學(xué)
已經(jīng)有11人回復(fù)
-
291求調(diào)劑
已經(jīng)有4人回復(fù)
-
276求調(diào)劑
已經(jīng)有4人回復(fù)
-
一志愿070300浙大化學(xué)358分，求調(diào)劑！
已經(jīng)有4人回復(fù)
-
一志愿中南大學(xué)化學(xué)學(xué)碩0703總分337求調(diào)劑
已經(jīng)有4人回復(fù)
-
一志愿北京化工大學(xué) 070300 學(xué)碩 336分 求調(diào)劑
已經(jīng)有5人回復(fù)
-
323求調(diào)劑
已經(jīng)有6人回復(fù)
-
352求調(diào)劑
已經(jīng)有3人回復(fù)
-
一志愿東華大學(xué)化學(xué)070300，求調(diào)劑
已經(jīng)有8人回復(fù)
-
277材料科學(xué)與工程080500求調(diào)劑
已經(jīng)有7人回復(fù)
guoqiusong(金幣+5, 翻譯EPI+1): 2010-04-25 09:21
guoqiusong(金幣+5): 2010-05-07 10:42:16
guoqiusong(金幣+5): 2010-05-07 10:42:16
| 圖4所示為合成的養(yǎng)花鎳納米棒的拉曼譜�？梢钥闯鲇兴膫�拉曼峰，分別位于 420, 546, 712, and 1092 cm-1, 。與預(yù)測的立方氧化鎳單晶的拉曼數(shù)據(jù)相比較，我們可以將712和1092cm-1的峰認(rèn)為是2TO 和2LO分別產(chǎn)生的，并且都向低頻移動了大約68 cm-1。因?yàn)閗=0時立方相里面的光子轉(zhuǎn)變?yōu)棣?4，不會出現(xiàn)第一序拉曼散射。因此觀察到的位于420和546的兩個第一序的拉曼風(fēng)必然是由部分分別的不連續(xù)造成的�！�26】這一結(jié)論由黑氧化鎳（鎳的空位濃度很高）第一序拉曼散射增強(qiáng)可得到證明。這種組合的拉曼散射在C點(diǎn)趨向于消失而在Brillouin區(qū)域的其他地方通常是較強(qiáng)的。這解釋了為什么組合峰集體漂移，因?yàn)檫h(yuǎn)離區(qū)域中心LO 和 TO都將受到抑制。 |
2樓2010-04-25 07:11:17
相關(guān)版塊跳轉(zhuǎn)
我要訂閱樓主 guoqiusong 的主題更新
| 2 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 生物學(xué)調(diào)劑 +5 | Surekei 2026-03-21 | 5/250 |
|
|---|---|---|---|---|
|
|
[考研] 269專碩求調(diào)劑 +6 | 金恩貝 2026-03-21 | 6/300 |
|
|
|
[基金申請] 山東省面上項(xiàng)目限額評審 +4 | 石瑞0426 2026-03-19 | 4/200 |
|
|
[考研]
 一志愿東華大學(xué)控制學(xué)碩320求調(diào)劑
+3
|
Grand777 2026-03-21 | 3/150 |
|
|
|
[考研] 一志愿南大，0703化學(xué)，分?jǐn)?shù)336，求調(diào)劑 +3 | 收到VS 2026-03-21 | 3/150 |
|
|
|
[考研] 299求調(diào)劑 +5 | shxchem 2026-03-20 | 7/350 |
|
|
|
[考研] 316求調(diào)劑 +6 | 梁茜雯 2026-03-19 | 6/300 |
|
|
|
[考研] 一志愿重慶大學(xué)085700資源與環(huán)境專碩，總分308求調(diào)劑 +3 | 墨墨漠 2026-03-18 | 3/150 |
|
|
|
[考研] 308求調(diào)劑 +3 | 阿姐阿姐家啊 2026-03-18 | 3/150 |
|
|
|
[考研] 350求調(diào)劑 +5 | weudhdk 2026-03-19 | 5/250 |
|
|
|
[考研] 一志愿 南京航空航天大學(xué)大學(xué) ，080500材料科學(xué)與工程學(xué)碩 +5 | @taotao 2026-03-20 | 5/250 |
|
|
|
[考研] 353求調(diào)劑 +3 | 拉鉤不許變 2026-03-20 | 3/150 |
|
|
|
[考研] 一志愿南理工085701環(huán)境302求調(diào)劑院校 +3 | 葵梓衛(wèi)隊(duì) 2026-03-20 | 3/150 |
|
|
|
[考研] 08工學(xué)調(diào)劑 +5 | 用戶573181 2026-03-20 | 5/250 |
|
|
|
[考研] 生物學(xué)調(diào)劑招人�。�！ +3 | 山海天嵐 2026-03-17 | 4/200 |
|
|
|
[考研] 材料考研調(diào)劑 +3 | xwt。 2026-03-19 | 3/150 |
|
|
|
[考研] 344求調(diào)劑 +6 | knight344 2026-03-16 | 7/350 |
|
|
|
[考研] 085601專碩，總分342求調(diào)劑，地區(qū)不限 +5 | share_joy 2026-03-16 | 5/250 |
|
|
|
[考研] 0854可跨調(diào)劑，一作一項(xiàng)核心論文五項(xiàng)專利，省、國級證書40+數(shù)一英一287 +8 | 小李0854 2026-03-16 | 8/400 |
|
|
|
[考研] 283求調(diào)劑 +3 | 聽風(fēng)就是雨； 2026-03-16 | 3/150 |
|