The present invention provides a complex which is coordinated by a protease and a nano sliver, wherein the complex having the absorption spectrum shown in FIG. 1 that absorbance at wavelengths 250-300 nm and wavelength 450 nm decreases after 17 hours of coordination. The present invention also provides an antibacterial method comprising applying the complex onto an object. The present invention still provides a method of removing odor produced by microorganisms comprising applying the complex onto an object.
