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Do the useful properties of copper change with oxidation? Silver is also antimicrobial, and also expensive. FWIU nanospikes in silicon achieved virucidal outc
by westurner 2y ago
Do the useful properties of copper change with oxidation?
Silver is also antimicrobial, and also expensive.
FWIU nanospikes in silicon achieved virucidal outcomes in small trials as well.
Is copper virucidal without nanospikes?
(On this topic,
Hemp textiles are antimicrobial / bactericidal: https://news.ycombinator.com/item?id=39196781#39197019 https://news.ycombinator.com/item?id=39196781#39197019 )
"Scientists create virucidal silicon surface without any chemicals" https://pubs.acs.org/doi/10.1021/acsnano.3c07099 https://pubs.acs.org/doi/10.1021/acsnano.3c07099 https://news.ycombinator.com/item?id=39196822 https://news.ycombinator.com/item?id=39196822
- duffpkg 2y agoOxidation is a problem as is physical debris but touch surfaces are cleaned at least daily in a hospital setting anyway. Plain old Copper/brass that has been used since forever is virucidal without any special treatment.
- westurner 2y agoIs the claim then that copper nanospikes on stainless steel are of no greater value than copper for healthcare applications? Is that claim supported by evidence?
- mensetmanusman 2y agoThe claim is that spikes kill faster, but probably not fast enough to matter since spikes are destroyed with shear cleaning.
- jahewson 2y agoA frequently touched surface isn’t going to have a problem with oxidation: https://en.m.wikipedia.org/wiki/Statue_rubbing https://en.m.wikipedia.org/wiki/Statue_rubbing
- aitchnyu 2y agoSo the people rubbing breasts of statues to a shine were doing it for uh... serious reasons?
- coffeebeqn 2y agoFor medical reasons thank you very much
- kjkjadksj 2y agoYou should see the brass bull on wall st
- tocs3 2y agoI looked at the wiki article but it did not touch on the anti-bacterial effects. Are there any studies? P.S. I am really curious (if just mildly) if anyone knows.
- tocs3 2y agoEdit: Ok it did touch on the subject. "It is also possible to acquire a bacterial infection from touching statues." The is even a reference to an article (https://atlasbiomed.com/blog/european-biome-monument-study-results/ https://atlasbiomed.com/blog/european-biome-monument-study-r...). Have not read yet but looks interesting.
- chasil 2y agoCopper and silver express the "oligodynamic effect," a tendency for antibacterial action, most strongly. Brass is a useful alloy of copper that does not oxidize and also exhibits this effect. https://en.wikipedia.org/wiki/Oligodynamic_effect https://en.wikipedia.org/wiki/Oligodynamic_effect