Just got that article recommended to me in chrome and came here to check if anyone commented. I would think this was well known much earlier but looking at this

Just got that article recommended to me in chrome and came here to check if anyone commented. I would think this was well known much earlier but looking at this and their previous paper it's actually quite interesting. BTW title is slightly misleading, this is about triboelectricity https://pubs.acs.org/doi/10.1021/acs.nanolett.4c03656# https://pubs.acs.org/doi/10.1021/acs.nanolett.4c03656#