Abstract
Silver–silica (Ag–SiO2) Janus particles with varying functionalities i.e. amine, thiol and epoxy on the exposed surface of SiO2 particles were synthesized and explored for their antimicrobial activity. Due to their easy dispersibility, Janus particles with silver nanoparticles (AgNPs) of diameter ∼3 nm showed much lower minimum bactericidal concentration (MBC) as compared to conventional isotropic AgNPs powder having AgNPs of almost similar diameter. The isotropic AgNPs and functionalized Ag–SiO2 Janus particles were attached on cotton fabric using exhaustion method followed by curing. The treated fabrics were tested for their antimicrobial activity and wash durability. Ag–SiO2 Janus particles, due to the presence of various functionalities on one–half of their surface, could be attached to cellulosic substrates for imparting durable antimicrobial property.
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