Comparative Raman study of transparent and turbid materials : models and experiments in the remote sensing mode
- The influence of turbidity on the Raman signal strengths of condensed matter is theoretically analyzed and measured with laboratory - scale equipment for remote sensing. The results show the quantitative dependence of back- and forward-scattered signals on the thickness and elastic-scattering properties of matter. In the extreme situation of thin, highly turbid layers, the measured Raman signal strengths exceed their transparent analogs by more than a factor of ten. The opposite behavior is found for thick layers of low turbidity, where the presence of a small amount of scatterers leads to a decrease of the measured signal. The wide range of turbidities appearing in nature is experimentally realized with stacked polymer layers and solid/liquid dispersions, and theoretically modeled by the equation of radiative transfer using the analytical diffusion approximation or random walk simulations.
| Author of HS Reutlingen | Boldrini, Barbara; Rebner, Karsten |
|---|---|
| DOI: | https://doi.org/10.1007/s00216-016-9582-0 |
| ISSN: | 1618-2642 |
| eISSN: | 1618-2650 |
| Erschienen in: | Analytical and bioanalytical chemistry |
| Publisher: | Springer |
| Place of publication: | Berlin, Heidelberg |
| Document Type: | Journal article |
| Language: | English |
| Publication year: | 2017 |
| Tag: | Monte Carlo simulations; Raman spectroscopy; diffuse light scattering |
| Volume: | 409 |
| Page Number: | 9 |
| First Page: | 673 |
| Last Page: | 681 |
| DDC classes: | 543 Analytische Chemie |
| Open access?: | Nein |
| Licence (German): |  In Copyright - Urheberrechtlich geschützt |
