Mulvaney directs the ARC Centre of Excellence in Exciton Science and runs Melbourne's nanoscience laboratory. The group's distinctive capability is single-particle and single-emitter optical spectroscopy: photon-antibunching and blinking statistics from individual quantum dots and perovskite nanocrystals, photothermal and dark-field spectroscopy of individual metal nanoparticles, and the electrochemical control of single-nanocrystal charge state. Applications run from LEDs and solar cells to quantum-dot probes for single-particle tracking in cells. Positioned against the established body of NV-ensemble quantum sensing work — DEER, nanoscale NMR and T1 relaxometry protocols operating at pT/sqrt(Hz) field sensitivity — his single-emitter photon-statistics measurements share the shot-noise-limited photon-counting methodology of NV-ensemble ODMR readout, and the group's nanocrystal probes are direct competitors/complements to nanodiamond in cellular sensing. Large, well-resourced group.

Pioneer of single-molecule/single-nanoparticle surface-enhanced Raman scattering (SERS) and quantum-dot bioconjugate imaging; develops nanoparticle probes for ultrasensitive molecular detection and in vivo tumor imaging.

Develops compact, bright semiconductor quantum dot probes for single-molecule and single-particle live-cell imaging, and photonic-crystal-enhanced single-quantum-dot digital biosensing (with B. Cunningham).