Fig. 4From: Aluminium-phthalocyanine chloride nanoemulsions for anticancer photodynamic therapy: Development and in vitro activity against monolayers and spheroids of human mammary adenocarcinoma MCF-7 cellsAbsorption (a) and fluorescence (b, excitation at 350 nm) spectra of 1 μM free AlPc in PBS or ethanol and of a blank nanoemulsion (S0) and S444 (1 μM AlPc) dispersed in PBS. The peaks at 710 nm in b are artefacts of the equipmentBack to article page