Figure 3

FTIR spectra of Phe, PhePyr, and PheAc that are similar to Phe-AuNCs when Au:Phe = 0.5, Au:Phe = 2.2-initial pH 6, and Au:Phe = 2.2-initial pH 7 respectively, showing the production of PhePyr and PheAc.
FTIR spectra of Phe, PhePyr, and PheAc that are similar to Phe-AuNCs when Au:Phe = 0.5, Au:Phe = 2.2-initial pH 6, and Au:Phe = 2.2-initial pH 7 respectively, showing the production of PhePyr and PheAc.