With support from the Division of Chemistry, Professor Joel Yuen-Zhou of the University of California San Diego, along with their collaborators from the University of Cambridge in the United Kingdom, are developing nanophotonic platforms to probe quantum spin states in individual organic molecules at room temperature. This collaborative project combines expertise in nanophotonics, organic photophysics, and quantum information science to address longstanding challenges in detecting and controlling quantum correlations in molecular systems. The project leverages nanoparticle-on-mirror (NPoM) nanocavities to enable highly localized optical fields that enhance photon collection and facilitate optical readout of single-molecule spin states. A central goal is to achieve the first room-temperature measurements of molecular spins using optically detected magnetic resonance (ODMR), overcoming previous limitations that required cryogenic conditions. Their discoveries could advance fundamental understanding of quantum entanglement in chemistry, reveal new mechanisms of spin coherence, and establish organic molecules as scalable platforms for quantum technologies. The project will also contribute to workforce development by training graduate students in interdisciplinary techniques spanning quantum optics, molecular spectroscopy, and nanofabrication, supporting the next generation of scientists in the global quantum science community. This award is made under the NSF-UKRI lead agency opp