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wuhuiwudi

金虫 (初入文坛)

[求助] 各位大侠请问碳材料中的Raman光谱峰中的2D峰

各位大侠请问碳材料中的Raman光谱峰中的2D峰是什么振动模式,由什么引起的?
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wulishi8

专家顾问 (知名作家)

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wuhuiwudi: 金币+1, ★★★很有帮助 2013-03-10 10:55:57
引用回帖:
13楼: Originally posted by 刺刺3996 at 2013-03-08 17:05:15
我也出现了一个2900多的峰 ,请问您解决了吗 那个是什么峰啊?...

2900的峰是D峰和D撇峰的叠加,说明石墨稀的缺陷超多,晶格很差。这种情况多见于D峰强度高于G峰。
中山大学材料学院招聘博士后和专职研究员,年薪20万起,请站内联系,谢谢。
15楼2013-03-09 21:47:08
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flying20080401

至尊木虫 (著名写手)

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wuhuiwudi: 金币+3, ★★★很有帮助 2012-06-26 18:17:01
lchpy: 金币+1, thanks for your information~ 2012-06-27 15:12:15
A 2D peak is the second order of the D peak and caused by the double resonant Raman scattering with two-phonon emissions. Interestingly, the 2D band, sensitive to the number of graphene layers, is free of  efect and has no D peak. It can be fitted with a single peak of the monolayer graphene and fitted with multiple peaks of multilayer raphene.
有道不径,有舟不游。
2楼2012-06-26 17:50:00
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wuhuiwudi

金虫 (初入文坛)

引用回帖:
2楼: Originally posted by flying20080401 at 2012-06-26 17:50:00
A 2D peak is the second order of the D peak and caused by the double resonant Raman scattering with two-phonon emissions. Interestingly, the 2D band, sensitive to the number of graphene layers, is fr ...

能不能用中文翻译一下,英文不太好理解
3楼2012-06-26 18:19:03
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867387710

金虫 (小有名气)

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wuhuiwudi: 金币+2 2012-06-26 20:27:35
lchpy: 金币+1, thanks for your information~ 2012-06-27 15:12:27
引用回帖:
3楼: Originally posted by wuhuiwudi at 2012-06-26 18:19:03
能不能用中文翻译一下,英文不太好理解...

就是说2D峰是D峰的二阶峰,由双振动拉曼散射造成,2D峰对石墨的层数敏感,可以分峰成为一个单层石墨峰,或好几个多层石墨峰。
我的理解就是D峰和2D峰的形成机理是相同的,其实在红外里就不会出现这种倍频峰,这是由拉曼的测试原理造成的,非要说形成机理的话就是D峰导致了2D峰
个人见解哈
4楼2012-06-26 18:57:36
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