1、Material characteriza;on‐材料表征Infrared spectroscopy (IR) Fourier transform infrared spectroscopy (FTIR)芦红Tel: 83592767 Email: hlu@nju.edu.cn12/04/2015Raman vs Infrared SpectraMcCreery,R.L.,RamanSpectroscopyforChemicalAnalysis,3rded.,Wiley,NewYork:20002Advantages of R
2、aman over IR•Watercanbeusedassolvent.•Verysuitableforbiologicalsamplesinnativestate(becausewatercanbeusedassolvent).•AlthoughRamanspectraresultfrommolecularvibrationsatIRfrequencies,spectrumisobtainedusingvisiblelightorNIRradiation.=>Glassandquartzlenses,cells,andopt
3、icalfiberscanbeused.Standarddetectorscanbeused.•Fewintenseovertonesandcombinationbands=>fewspectraloverlaps.•Totallysymmetricvibrationsareobservable.3•Ramanintensitiesαtoconcentrationandlaserpower.Advantages of IR over Raman•Simplerandcheaperinstrumentation.•Lessinst