WebbIndex Headings: Confocal Raman microspectroscopy; Polymer Þlms; Depth resolution; Dry objectives; Refraction. INTRODUCTION Confocal Raman microspectroscopy (CRM) has been widely shown to be a valuable technique for probing chemical/ physical properties in sampl e regions with microscopic dimensions. 1 3 Spatial discrimination is provided by a … Webb6 dec. 2007 · Raman scattering spectroscopy for explosives identification An instrument that uses an eye-safe laser source can detect trace levels of improvised explosive …
Guide to Raman Spectroscopy Bruker
WebbThe scattered light is then analyzed by spectrometry analysis. Figure 8 presents a series of measured spectra, recorded while illuminating the tips in bright- and dark-field modes. At this stage, it appeared that the most promising type of tip, toward future optically resolved scanning probes, was the TESP-HAR model, given the higher consistency of the obtained … WebbRaman spectroscopy is based on the Raman effect, which is the scattering of light by molecules, resulting in a shift in the frequency of the scattered light. This frequency shift is proportional to the vibrational energy of the molecule, so by analyzing the scattered light, researchers can learn about the vibrational modes of the molecule and the chemical … origin from还是in
Various illumination and detection schemes for Raman …
Webbon a sample and collect scattered light requires specific design of a heating furnace, which should protect the objective against harmful effects of high temperatures and melt evaporation products. Therefore, high-temperature micro-Raman systems, as a rule are equipped with commercially available compact electric fur - WebbSurface-enhanced Raman scattering (SERS) is one method used to amplify weak Raman signals. Raman signals are inherently weak, a result of the statistically low number of … Webbthe Rayleigh scattered light from entering the spectrometer. This was followed by a 25 mm diameter polarization scrambler (Optics for Research, model DPU-25, Caldwell, NJ) to depolarize both the luminescence and the Raman scattered light. Lastly, long-pass Þlters were placed just before the focusing lens (and in the collimated light path) to ... originf x 函数命令copy