Photoacoustic and Optical spectral transformations in Solid Lipid Nanoparticles labelled with increasing concentrations of Photoacoustic NIR BODIPY

Solid lipid nanoparticles labelled with a photoacoustic BODIPY dye exhibit complex but continuous transformation for both optical and photoacoustic spectra as the BODIPY content increases. Gaussian decomposition of the spectra reveals the interplay between three optical absorption bands and unveils a band-dependent and concentration-dependant photoacoustic generation efficiency above 1.