Selective Immobilization of Silver Nanoparticles onto Poly(acrylic acid)-Patterned Poly(tetrafluoroethylene) Surface Prepared by Using Radiation-Induced Graft Polymerization

Abstract

Selective immobilization of silver nanoparticles on a polymer surface by using ion irradiation-induced graft polymerization was demonstrated in this research. Poly(tetrafluoroethylene) (PTFE) films were irradiated with accelerated proton ions through a pattern mask. Acrylic acid (AA) was graft polymerized selectively on the irradiated regions of the PTFE surface at various fluences. The grafting degree of AA on the PTFE surface was dependant on the ion fluence and peroxide concentration. The analytical results for the chemical structure and wettability of the grafted PTFE verified the occurrence of the graft polymerization on the irradiated surface. The UV-Vis and SEM-EDX analysis revealed that silver nanoparticles were successfully immobilized on the grafted regions of the PTFE surface, and therefore, resulting in well-defined patterns of silver nanoparticles on the PTFE surface.