U1000 T64000 HR 800
Aramis XPloRA
© 2009 HORIBA, Ltd. All rights reserved.
2-什么是拉曼光谱?
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时间和发现人
1928 年，印度科学家C.V Raman in首先在CCL4光谱 中发现了当光与分子相互作用后，一部分光的波长 会发生改变（颜色发生变化），通过对于这些颜色 发生变化的散射光的研究，可以得到分子结构的信 息，因此这种效应命名为Raman效应。
-1
1 500
2 000

© 2009 HORIBA, Ltd. All rights reserved.
D-band
Info on defects
高分辨率实验结果
x10 3 40 35 30 25 20 15 10
LabRAM HR普通分辨率 LabRAM HR高分辨率模式
Intensity (cnt)
北京-拉曼光谱仪应用中心
© 2009 HORIBA, Ltd. All rights reserved.
核心技术 : 衍射光栅
等离子刻蚀全息光栅
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光谱仪的心脏——光栅
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瑞利散射
散射光 弹性散射（频率不发生改变-瑞利散射） 非弹性散射（频率发生改变-拉曼散射） lscatter= llaser
llaser
拉曼散射
lscatter> llaser
© 2009 HORIBA, Ltd. All rights reserved.
拉曼散射原理
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© 2009 HORIBA, Ltd. All rights reserved.
1-公司简介
© 2009 HORIBA, Ltd. All rights reserved.
1819: Creation of the Company, in Paris, by Jean-Baptiste Soleil 1923: The company becomes A. Jobin & G. Yvon 1997: HORIBA acquired Jobin Yvon 2004: ― One Company Project ‖ , Jobin Yvon became
OH stretching
00 500
500
1000
1000
1500
1500
2000
2000
2500
2500
3000
3000
3500
3500
ni = no-n (cm-1)
© 2009 HORIBA, Ltd. All rights reserved.
不同碳材料的拉曼光谱
同样元素 不同结构
GC: Glassy Carbon DC: Disordered Carbon µG: microcrystalline Graphite G: Graphite D: Diamond
[1] Samuel H. Margueron, et al., Journal of Crystal Growth 310 (2008)5321 –5326.
© 2009 HORIBA, Ltd. All rights reserved.
SiC 晶型分布
-25 000 -20 000
-15 000
Provided by Prof. D. Mukherjee, Director of Indian Association for the Cultivation of Science
© 2009 HORIBA, Ltd. All rights reserved.
什么是拉曼散射?
光散射的过程：激光入射到样品，产生散射光。
HORIBA Jobin Yvon
© 2007 HORIBA, Ltd. All rights reserved.
© 2009 HORIBA, Ltd. All rights reserved.
报告内容
1-公司简介 2-什么是拉曼光谱技术 3-拉曼光谱仪工作原理 4-拉曼光谱仪性能的几个重要概念 5-HORIBA Jobin Yvon拉曼光谱仪介绍
应力测量
© 2009 HORIBA, Ltd. All rights reserved.
蓝宝石衬底上的GaN的应力分布
左图的颜色条给出该GaN样 品的E2模相对于体相GaN中该 拉曼峰[567.25cm-1][1]的峰位偏 移量。
仪器： LabRAM HR
激发波长：514nm
光栅： 1800gr/mm
吉林大学样品
7 000 6 000
红色：普通分辨率结果 兰色：高分辨率结果
CaCO3-1800 CaCO3-600
CaCO3-1800 CaCO3-600
5 000
Intensity (cnt)
4 000
3 000
2 000
190 200 210
Raman Shift (cm-1)
220
230
240
D-band
Info on defects
石墨烯的拉曼光谱
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石墨烯的拉曼光谱成像
© 2009 HORIBA, Ltd. All rights reserved.
高温原位拉曼测试
可观察到强烈 的黑体辐射
2010年12月摄于西安交通大学
拉曼是物质的指纹光谱
20000 20000
甲醇vs. 乙醇
OH Bending
Intensity (A.U.)
15000 15000
CH3 Stretching Modes
10000 10000
CCO modes
5000 5000
Skeletal Bending
CH3 and CH2 Bending Modes
穿透深度 (nm)
00
325nm
458nm
488nm
00 350 400 450 500 -1 Raman Shift (cm ) 550
非晶硅 单晶硅
9.4 8.2
53 456
81 717
*以上穿透深度由材料的消光系数计算所得
感谢南开大学硅薄膜太阳电池产学研基地，段苓伟老师提供样品数据。
© 2009 HORIBA, Ltd. All rights reserved.
1 000
0 200 400 600 800 1 000 Raman Shift (cm -1 ) 1 200 1 400 1 600 1 800
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不同分辨率测量应力实验结果
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© 2009 HORIBA, Ltd. All rights reserved.
3-拉曼光谱仪的工作原理
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拉曼光谱测量原理
探测器 光栅
滤光片 激光
样品
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Tube Diameter
2.5
Electronic properties
Intensity (cnt/sec)
2.0
Radial Breathing Mode
1.5 1.0
0.5
0.0 500 1 000
Raman Sh ift (cm )
IBA, Ltd. All rights reserved.
全系列拉曼光谱仪
Detector plane
l1 Detector plane l2 F1=300mm
—多种焦长仪器可选择
l1
l2 F2= 800mm
U1000 T64000 HR 800
Aramis XPloRA
© 2009 HORIBA, Ltd. All rights reserved.
LabRAM HR
(高分辨拉曼光谱仪)
© 2009 HORIBA, Ltd. All rights reserved.
5 120 140 160 180 200 220 240 260
Raman Shift (cm-1)
Higher spectral resolution allows more accurate observation of tubes of different diameters
© 2009 HORIBA, Ltd. All rights reserved.
碳纳米管研究
3.0
Tangential Modes (G-Modes)
Tube Diameter
2.5
Electronic properties
Intensity (cnt/sec)
2.0
Radial Breathing Mode
1.5 1.0
0.5
0.0 500 1 000
Raman Sh ift (cm )
分辨率高 标定峰位峰面积更准确
© 2009 HORIBA, Ltd. All rights reserved.
分辨率高 数据点多 描述峰位准确
© 2009 HORIBA, Ltd. All rights reserved.