000K  utf8
1100  2021$c2021-05-26
1500  eng
2050  urn:nbn:de:hbz:465-20220720-115050-5
2051  10.1126/sciadv.abg7595
3000  Kaponig, Mirco
3010  Mölleken, Andre
3010  Möller, Rolf
3010  Nienhaus, Hermann
4000  Dynamics of contact electrification  [Kaponig, Mirco]
4209  Although the electrical charging of objects brought into contact has been observed for at least 2000 years, the details of the underlying mechanism are still not yet fully understood. The present paper deals with the very basic process of contact electrification between two metals. We have developed an experimental method to follow the charge of a small sphere bouncing on a grounded planar electrode on a time scale down to 1 μs. It reveals that the sphere is discharged in the moment of contact, which lasts about 6 to 8 μs. However, at the very moment of disruption of the electrical contact, it regains charge far beyond the expectation according to the contact potential difference. The excess charge rises with increasing contact area.
4950  https://doi.org/10.1126/sciadv.abg7595$xR$3Volltext$534
4950  https://nbn-resolving.org/urn:nbn:de:hbz:465-20220720-115050-5$xR$3Volltext$534
4961  https://duepublico2.uni-due.de/receive/duepublico_mods_00076237
5051  530