Cool idea and cool looking, but just want to point out that surface transmission of infections is several orders of magnitude less common than airborne transmission.
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If we're talking sanitation tech: I'm personally really excited by the further miniaturization of (far)-UVC light sources [1]. Far-UVC lamps deactivate airborne pathogens, but cannot penetrate the human eyes or skin making them generally safe to use.
Right now they do require rather bulky lamps (Krypton Chloride), but last I checked there had been promising advancements in producing far-UVC LEDs [2]. Which should make installation and deployment of far-UVC both more practical and economical in the future.
[1]: https://en.wikipedia.org/wiki/Far-UVC
[2]: https://ece.engin.umich.edu/stories/ece-spinout-company-ns-n...
And easily thwarted by washing your hands.
And then grabbing the bathroom door handle.
With my sleeve.
(Although I did see a lot of foot-operated door handles emerge on public restroom doors during the covid years. They're mounted down low, near the floor, and you can just put your shoe on them and drag the door open without using hands. They make sense to me for what I think are a lot of good reasons.)
The Metro (trains) stations in my city have foot-operated levers (pedals) to control the elevators/lifts, doors, toilet taps/faucets (though the urinal themselves have sensors to auto-flush), etc.
Although, as a precaution, I carry a hand-sanitizer and fresh mask in my bag whenever I commute on such public transportation.
I guess the pandemic (and the eerie realisation that it can repeat anytime, since it was decidedly an artificial one) has attuned me to be more vigilant on my safety and health, so I try to be cautious and safe in public where crowds can gather.
Grab bathroom door handle with a napkin then or use a pocket hand sanitizer