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Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
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Enhanced Fluorescence in a Scattering Medium.
Nathan A Giauque1, Callum E Flowerday1, Steven R Goates1
1Department of Chemistry and Biochemistry, Brigham Young University, Provo, USA.
Applied Spectroscopy
|July 16, 2021
Summary
Small sample spectroscopic analysis can be improved using silica particle-packed columns. These columns enhance signal by increasing optical path length through light scattering, particularly effective for fluorescence spectroscopy.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Materials Science
Background:
- Limited sample availability poses challenges in spectroscopic analytical determinations.
- Enhancing signal detection is crucial for accurate quantitative analysis with small sample volumes.
Purpose of the Study:
- To investigate the signal enhancement capabilities of silica particle-packed columns for spectroscopic analysis.
- To explore the mechanism of signal enhancement, specifically light scattering by silica particles.
- To evaluate the effectiveness of packed columns across different spectroscopic techniques.
Main Methods:
- Utilizing columns packed with silica particles for spectroscopic measurements.
- Employing fluorescence spectroscopy to assess signal enhancement.
- Conducting experiments with absorbance spectroscopy to evaluate packed column performance.
Main Results:
- Silica particle-packed columns demonstrated effectiveness in enhancing signals for fluorescence spectroscopy.
- The proposed mechanism of increased optical path length due to light scattering was supported for fluorescence.
- Results for absorbance spectroscopy were inconclusive, indicating limitations for this technique.
Conclusions:
- Silica particle-packed columns offer a viable method for signal enhancement in fluorescence spectroscopy with limited sample sizes.
- The light-scattering property of silica particles is key to improving optical path length and signal intensity.
- Further research is needed to optimize packed columns for absorbance spectroscopy applications.