Fig. 1From: Unsymmetrical cyanine dye via in vivo hitchhiking endogenous albumin affords high-performance NIR-II/photoacoustic imaging and photothermal therapyChemical structures of the molecular fluorophores (ICG-COOH, NIC and NIC-ER) and their optical properties. a Absorbance spectrum of ICG-COOH in DMSO. b Absorbance spectra of NIC in different solvents. c Absorbance spectra of NIC in PBS with different concentrations. d Emission spectra of NIC in different solvents. e Absorbance spectra of NIC-ER in PBS added with different concentrations of HSA from 0Â mg/mL to 25Â mg/mL. f Emission spectra of NIC-ER in PBS added with different concentrations of HSA from 0Â mg/mL to 25Â mg/mLBack to article page