Figure 2: Self-assembled peptide/(DPP)Zn/TiO2 arrays.
From: Photoinitiated charge separation in a hybrid titanium dioxide metalloporphyrin peptide material

(a) Detail of the interface and (b) cartoon depiction of the self-assembled morphology for c16-AHL3K3-CO2H/(DPP)Zn/TiO2 and analogous depictions (c,d) for c16-AHL3K9-CO2H/(DPP)Zn/TiO2.