Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
a) ΔA 3D matrix of synthetic eumelanin in HPLC-grade water suspension excited at 2.254 eV: probe energy on the x-axes, time delay on the y-axes and differential absorption on the z-axes; the black rectangle highlights the region around τ = 0, whose spectrum is reported in b). The A, B and C regions in b) indicate the energies at which the transient absorption dynamics has been probed and shown in Figs. 7(A), 7(B) and 7(C), respectively.
