* Corresponding authors

^a Centre for Biospectroscopy and School of Chemistry, Monash University, Victoria, Australia
E-mail: phil.heraud@monash.edu

^b Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków, Poland

^c FOCAS Research Institute, Technological University Dublin, City Campus, Dublin, Ireland

^d Photothermal Spectroscopy Corp., 325 Chapala St, Santa Barbara, CA, USA

^e Department of Neuroscience/Central Clinical School, Monash University, Alfred Centre, 99 Commercial Rd, Prahran, Victoria, Australia

^f Department of Microbiology and the Biomedical Discovery Institute, Faculty of Medicine, Nursing and Health Sciences, Monash University, Victoria, Australia