Nanoparticle-based photoacoustic analysis for highly sensitive lateral flow assays

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Nanotechnology

Background:

• Lateral flow tests are widely used for rapid diagnostics.
• Colorimetric detection in lateral flow assays has limitations in sensitivity.
• Gold nanoparticles offer unique optical properties for enhanced detection.

Purpose of the Study:

• To develop and validate a photoacoustics-based lateral flow test for quantitative biomarker detection.
• To improve the sensitivity of existing lateral flow test strips.
• To leverage the light-absorbing properties of gold nanoparticles for enhanced signal generation.

Main Methods:

• Utilized gold nanoparticles for enhanced light absorption.
• Implemented photoacoustic detection principles.
• Adapted commercially available lateral flow test strips.
• Quantitatively analyzed photoacoustic signals.

Main Results:

• Achieved quantitative detection of a disease biomarker.
• Improved the detection limit by two orders of magnitude compared to colorimetric methods.
• Demonstrated the efficacy of photoacoustics for sensitive lateral flow assays.

Conclusions:

• Photoacoustics-based lateral flow tests offer superior sensitivity for biomarker detection.
• This approach significantly enhances the performance of standard diagnostic strips.
• The developed method holds promise for more accurate and sensitive point-of-care diagnostics.