Cov hmoov nplej uas tsis muaj ntoo thuv, kev txav mus los;Ob txheej txheej ntawm cov hmoov hmoov nto roughness, zoo conductivity;Peb cov khoom siv ua haujlwm siab ua haujlwm, nrog kev ua haujlwm zoo rau oxidation.Siv dav hauv cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, hluav taws xob conductivity, electromagnetic shielding, anti-bacterial anti-virus.