(SERS）surface-enhanced-Raman-spectroscopy培训材料.ppt

SERS quenches fluorescence SERS improves the detection limit: Adenine SERS EM enhancement – shape effect SERS EM enhancement – shape effect SERS EM enhancement – aggregation effect Near-field Raman spectroscopy Near-Field Microscopy Near-Field Geometries Schematic Near-Field Microscope Set-up Light at Small Apertures Near-field Apertures Investigation of Liquid-Liquid Interfaces NF Raman studies of water-carbon-tetrachloride interface Raman intensity of water stretching vibration vs. the distance covered by the piezo translator NF Raman studies of water-carbon-tetrachloride interface Raman spectral shift of water stretching vibration vs the distance covered by the piezo translator Investigation of Chemical Reactions using NF-Raman Heterogeneous Catalysis Heterogenous Catalysis Correlation of Topography and Spectra Raman spectra from Na0.5CoO2 as function of temperature and a phase transition from C3v to C2v has been observed Another phase transition was observed after annealing the sample at 495 K. Conclusion C3v------ A1 +A2 + Eg C2v-------3A1+3B1+A2+2B2 D6h------ A1g + E1g + 3E2g In vivo Raman system In vivo Raman system Brain tissue Thoracic cavity tissue Thoracic cavity tissue Application of CRS on probing into history Application of CRS on probing into history Application of CRS on probing into history 　频移参数与盐浓度关系曲线 锐钛矿和金红石相的UV-vis 和拉曼光谱图 532 nm 244 nm 325 nm TiO2不同温度焙烧的XRD图谱和可见拉曼光谱 可见拉曼的结果与XRD的结果一致 混合晶相 金红石晶相 TiO2不同温度焙烧的紫外和可见拉曼光谱 Phase transformation of TiO2 calcined in air at different temperatures Rutile Anatase 300 500 400 700 800 Calcination Temperature/oC Surface phase Bulk phase 600 500oC (锐钛矿) 600oC (锐钛矿和金红石 的混合晶相) 800oC (金红石) 不同温度焙烧的 TiO2 样品的TEM 小粒子团聚成大粒子 TiO2相变模型 400