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Au-Ag Alloy Nanoshuttle Mediated Surface Plasmon Coupling for Enhanced Fluorescence Imaging
Kai-Xin Xie1,2, Zhao Li2, Jia-Hua Fang2
1College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, China.
Biosensors
|November 24, 2022
Summary
This study enhances bioimaging using surface plasmon-coupled emission (SPCE) with gold-silver alloy nanoshuttles. The new method improves imaging brightness and resolution for clearer visualization of cellular structures.
Area of Science:
- Nanophotonics
- Bioimaging
- Surface Plasmon Resonance
Background:
- Surface plasmon-coupled emission (SPCE) is a signal enhancement technology for bioimaging.
- Variable-angle nanoplasmonic fluorescence microscopy (VANFM) uses SPCE to modulate imaging depth via excitation angles.
Purpose of the Study:
- To improve the imaging performance of SPCE systems.
- To enhance brightness, signal-to-background ratio, and axial resolution in bioimaging.
- To investigate the use of Au-Ag alloy nanoshuttles for mediating plasmonic properties.
Main Methods:
- Integration of Au-Ag alloy nanoshuttles into an Au substrate.
- Utilizing a modified SPCE chip with enhanced localized plasmon effects.
- Employing variable-angle nanoplasmonic fluorescence microscopy (VANFM).
Main Results:
- Achieved superior imaging brightness, signal-to-background ratio, and axial resolution.
- Successfully imaged the cell membrane region with enhanced clarity.
- Amplified imaging signals using critical angle excitation mode for near- and far-field visualization.
Conclusions:
- Au-Ag alloy nanoshuttles significantly enhance SPCE imaging performance.
- The modified SPCE chip offers advantages for detailed cellular imaging.
- This technique provides a more comprehensive investigation of cellular interactions.
