Brass doorknobs (or any other brass objects) sterilise themselves after about 8h since bacteria have a hard time surviving on brass. This is called the Oligodynamic Effect.

Oligodynamic effect Silver spoons self-sanitize due to the oligodynamic effect The oligodynamic effect (from Greek oligos “few”, and dynamis “force”) is a biocidal effect of metals, especially heavy metals, that occurs even in low concentrations. The effect was discovered by Karl Wilhelm von Nägeli, although he did not identify the cause. Scholarly texts from ancient …

Brass doorknobs (or any other brass objects) sterilise themselves after about 8h since bacteria have a hard time surviving on brass. This is called the Oligodynamic Effect. Read More »