Lecture topic: Engineering Optical Nanoscale Tools with DNA
Optical labels and sensors are invaluable tools for understanding biological processes and dissecting disease mechanisms. The advent of single-molecule and super-resolution imaging techniques has placed increasingly stringent demands on these probes, necessitating high photostability for labels and single-molecule sensitivity with high optical contrast for sensors. This lecture will discuss our recent efforts to address these challenges by combining single-molecule imaging with DNA nanotechnology.
Specifically, we utilize DNA origami to decouple sensing from signal output, enabling the creation of modular and tunable sensor platforms that exhibit both large Förster Resonance Energy Transfer (FRET) contrast and single-molecule sensitivity (Nat. Nanotech. 2025, 20, 303). The inherent modularity of this DNA origami approach allows for the development of single-molecule sensors targeting diverse analytes, including nucleic acids, antibodies, and enzymes, simply by exchanging sensing elements. Furthermore, the incorporation of multiple sensor elements facilitates cooperativity, tunable dynamic range, and advanced logic sensing operations.
While DNA nanotechnology holds immense promise for biomedical applications, its widespread utility is often limited by the inherent instability of DNA nanostructures within complex biochemical environments. In the lecture I will also discuss our ongoing research aimed at understanding and enhancing the addressability and functionality of DNA nanodevices, leveraging the power of single-molecule and super-resolution imaging (Adv. Mater. 2023, 35, 2212024; Small 2025, in press).