Fig. 3. (a) Normalized absorption spectra of ZnTPP in ethanol and ZnTPP in ethanol mixed with water and D-g-PAAan water-based solution, and the difference spectrum between ZnTPP/D-g-PAAan/AuNPs and D-g-PAAan/AuNPs solutions. (b) Normalized absorption spectra of ZnTPP/D-g-PAAan/AuNPs and D-g-PAAan/AuNPs solution and the difference spectrum between ZnTPP/D-g-PAAan/AuNPs and D-g-PAAan/AuNPs solutions. The difference spectrum is presented to subtract Au NP absorption. The concentrations were as follows: ZnTPP, 0.001 g L−1; D-g-PAAan, 0.080 g L−1; Au, 0.079 g L−1.
