“…The Ag-NPs@SHS coated on copper alloy, pretreated copper alloy sheet, etched Cu-substrate, and immersed copper alloy had average sizes of 26.41 nm, 24.64 nm, 25.23 nm, and 19.99 nm. 51 The Williamson-Hall (W-H) method is utilized to determine the crystallite size on the coated sample of copper alloy, the Ag@SHS immersed copper alloy and etched Cu-substrate. In this equation, "d" is used for grain size, "β" for full width at half maximum, "λ" for the wavelength of Cu-Kσ, "ε" and "A" for constant value one, "η" for crystal strain, and "k" for another constant whose value is between 0.9 and 1.47.…”