How do self-cleaning surfaces work?


Lately I’ve been seeing anti-microbial and self-cleaning surfaces being put on public doorways and other routinely touched surfaces

How exactly do these surfaces self-clean? Do they really work as advertised or are they just a marketing gimmick to make people feel more comfortable?

In: Biology

It’s not so much self-cleaning, it’s that the surface is designed to be inhospitable for bacteria. Or contains compounds that kill bacteria.

For example, if you have a [copper alloy]( counter, it can kill bacteria that land on it within 1-2 hours. If that same surface was stainless steel, the bacteria could live on it for weeks.