New microscopy method achieves angstrom-scale localization precision with one laser

Researchers at MIT and the Broad Institute have created a groundbreaking super-resolution imaging technique called U-STORM (Upconversion-enabled Stochastic Optical Reconstruction Microscopy). This new method enables scientists to visualize molecular structures with angstrom-level precision—three times more accurate than standard fluorescent dyes—while simplifying the imaging process.

The key innovation lies in using upconverting nanoparticles (UCNPs) engineered to blink spontaneously and indefinitely under continuous near-infrared light. Unlike traditional nanoparticles, which were considered photostable and nonblinking, these UCNPs allow for prolonged imaging without requiring complex buffers or additional optical control.

The MIT and Broad Institute team achieved this by precisely controlling the composition of the core-shell nanoparticles, enabling them to enter a continuous blinking state that dramatically improves localization precision to just 0.6 angstroms. What's more, U-STORM requires only a single near-infrared laser, simultaneously exciting nanoparticles that emit different colors—eliminating the need for multiple lasers and meticulous alignment found in conventional multicolor super-resolution imaging.

This breakthrough not only expands the boundaries of microscopy but also establishes a new design principle for lanthanide nanomaterials. The research team is already working on expanding the color palette, making the particles even smaller and brighter, and using U-STORM to investigate complex nanoscale protein organizations and cellular signaling pathways.

This simple, accessible, and powerful approach to high-precision molecular imaging promises to benefit laboratories worldwide.