The Diamond Nanoscience group is based in the Department of Physics and Astronomy of Macquarie University, close to Sydney. We are part of the Centre of Excellence for Engineered Quantum Systems. The group involves cross-disciplinary research activity including the growth and the post-processing of nanodiamonds for their application in emerging fields of single particle probing, of magnetic nanosensors and microscopy. The studies undertaken include the use of fundamental quantum optics experiments, material science experiments and a combination of chemical physics approaches.