Fig. 9 exhibits the typical antibacterial results of the samples by the disk method. The E. coli suspension in aqueous LB is spread evenly on the agar plates. The samples are covered and incubated for 12 h. Formation of a clear zone around the samples shows inhibition of bacterial growth as an indication of the antibacterial activity. The Ag_NiTi and chitosan_NiTi samples do not show clear inhibition zone, whereas chitosan/Ag_NiTi sample exhibits distinctive antibacterial inhibition zones. The results are in linewith those obtained from the microplate method and clearly demonstrate that the chitosan/ Ag complex coating exhibits excellent bacterial inhibition.