显微共焦激光拉曼光谱仪

显微共焦激光拉曼光谱仪

中国科学院广州化学研究所分析测试中心

事业部----卿工---131-1331-6131

仪器公司：英国RENISHAW

仪器型号：INVIA

技术指标：

测试范围：

1）80-9400cm-1（514.5nm激发光）

2）100-5800cm-1（632.8nm激发光）

3）100-3200cm-1（785nm激发光）

空间分辨率：横向1微米，纵向1微米

光谱分辨率:1-2 cm-1

光谱重复性：±0.2 cm-1

拉曼光谱简介：

当一束单色光（激光）照射在样品上，会被物质所散射，大部分散射光的频率与入射光的相同，但也有少量散射光出现频移，这种反映物质化学键或分子振动特征的非弹性散射现象是印度物理学家C.V.拉曼于1928年发现的，故被称为拉曼效应。样品对激光的散射光频率——拉曼光谱，可以在一台与拉曼光谱仪连接起来的、普通光学显微镜上获得。

拉曼光谱可反映材料的化学组成、状态、聚合情况以及应力、取向等信息，已广泛应用于薄膜、涂料、集成电路、矿物包裹体等的研究，以及颜料、毒品、爆炸物和生物组织等领域的鉴定工作中。

Manufacture: Renishaw

Model: Invia

Main Specifications:

Spectra Range

1）80-9400cm-1（514.5nm laser）

2）100-5800cm-1（632.8nm laser）

3）100-3200cm-1（785nm laser）

Spacial Resolution: lateral 1 micro, depth 1 micro

Spectral Resolution: 1-2 cm-1

Spectral Repeatability: ±0.2 cm-1

Introduction to Raman Spectroscopy：

When a sample is illuminated with a monochromatic light (a laser), the light is scattered by the material. Most of the scattered light have the same frequency or color as the incident light, but a very tiny amount experiences a frequency shift, which is characteristic of the chemical bonds or molecules present in the material. This inelastic scattering of light is called the Raman effect after C.V.Raman, who discovered in 1928. The scattered frequencies, i.e. Raman spectroscopy, is analyzed by a conventiona optical microscope coupled to a Raman spectrometer, It gives information on the material chemical composition, state, aggregation, and even factors like stress, orientation, etc. Raman spectroscopy has been applied to the study of thin films, coatings, microelectronic integrated circuits, mineral inclusions, pigments in art works, identification of narcotics and plastic explosives, biological tissues and others.