Which scientific technology is primarily used in the latest generation of self-cleaning shopping carts developed by retail innovation labs?

In the intersection of science and retail, innovation labs are constantly developing new technologies to enhance the shopping experience. One significant advancement in recent years has been the development of antimicrobial and self-cleaning retail equipment. This poll tests your knowledge about a breakthrough in shopping cart technology that changed how retailers approach hygiene in high-touch areas, especially relevant in our post-pandemic world.

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Photocatalytic titanium dioxide coating activated by UV-C light
Quantum silver nanoparticle misting system
Chlorine dioxide slow-release polymer embedded handles
Electrostatic copper-zinc alloy surface treatment