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| Type |
Symposium |
| Area |
Recent Advances in Analytical Chemistry I: Advanced Materials and Instrument in Analytical Chemistry |
| Room No. |
303호 |
| Time |
THU 13:50-: |
| Code |
ANAL1-2 |
| Subject |
Investigation on variation of Raman spectral feature by change of particle size |
| Authors |
정회일
한양대학교 화학과, Korea |
| Abstract |
The variation of Raman spectral feature with change of particle size has been systematically investigated. Both lactose powders and pellets composed of five different particle sizes were prepared for the examination. Uniquely in this study, three separate spectral acquisition schemes with different sizes in laser illumination and detection window were employed. In both samples, the distribution of Raman photons became broader with the increase of particle size, since mean free path of laser photons, average photon travel distance between consecutive scattering locations, became longer under this situation. In a meanwhile, the photon distribution was narrower in the pellets since individual particles were more densely packed in a given volume. In overall, physical characteristics of a sample determining the internal Raman photon distribution was surely the main factor influencing on Raman intensity. More notably, experimental configuration used for spectral acquisition was another crucial factor affecting the peak intensity, as exclusively investigated in this study. Monte Carlo simulation was effective to probe the photon distribution inside the samples and help to support the experimental observations |
| E-mail |
hoeil@hanyang.ac.kr |
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119th General Meeting of the KCS