The use of fluorescence microscopy has been foundational to the advancement of our understanding of cell biology. These approaches collectively rely on specific labeling of molecules with fluorescent dyes to support imaging that allows resolution of localization within cells and their internal structures. The quality and interpretability of this imaging is significantly impacted by fluorescence signal detection, and limited by photobleaching and phototoxicity.
The Metal-Enhanced Fluorescence Approach
Metal-enhanced fluorescence (MEF) is a phenomenon in which metallic nanoparticles — in our case silver nanoparticles — in close proximity to fluorescent dyes dramatically increase their emission intensity. By engineering silver nanoparticles that can be targeted to specific cellular structures, we aim to improve the signal-to-noise ratio in fluorescence microscopy while simultaneously reducing the laser power required for imaging, which in turn reduces photobleaching and phototoxicity.
This approach has the potential to extend imaging duration, improve the detection of low-abundance molecular targets, and enable new super-resolution imaging strategies in living cells — ultimately pushing the boundaries of what can be observed in fundamental cell biology experiments.