Fig. 1.

(A) Schematic representation of the co-sputtering process: the physical mask with discrete holes is placed on top of PBT substrate. The color gradient represents the chemical composition gradient (B) SEM image of PBT (C) Sessile drop static contact angle measurement of deionized water on PBT surface after sputtering Zr, Cu, Ag. The selected samples for further antifouling properties investigation are marked by the green box. The complete list of measured values is presented in Table S1 is supplementary materials.