研究目的
Investigating the effect of particle size on the spatial distribution of Raman scattering in barium nitrate samples.
研究成果
The spatial width of Raman scattering has a better linear correlation with particle size than Raman intensity, indicating that particle size strongly affects the spatial distribution of Raman scattering. This integrated spectral and spatial information is essential for the quantitative analysis of physical properties.
研究不足
The study is limited to barium nitrate samples and a non-confocal Raman system. The effects observed may vary with different materials or confocal systems.
1：Experimental Design and Method Selection:
The study uses a home-made non-confocal Raman system to collect Raman spectra of barium nitrate with different particle sizes. The system includes a 785 nm laser, a grating-based spectrograph, and a CCD detector.
2：Sample Selection and Data Sources:
Barium nitrate powders were sieved to produce powders of defined particle sizes.
3：List of Experimental Equipment and Materials:
Equipment includes a 785 nm laser (B&W Tek, Inc.), a grating-based spectrograph (Andor Technology Ltd.), and a CCD detector (Andor Technology Ltd.). Materials include barium nitrate powders and quartz glass cuvettes.
4：Experimental Procedures and Operational Workflow:
The Raman spectra were collected at different sampling positions, and the spatial widths were determined by two-term 2D Gaussian fitting.
5：Data Analysis Methods:
The spatial widths and Raman intensities were analyzed to determine their correlation with particle size.
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