The influence of ions and humidity on charging of solid hydrophobic surfaces in slide electrification.

ABSTRACT: Water drops sliding down inclined hydrophobic, insulating surfaces spontaneously deposit electric charges. However, it is not yet clear how the charges are deposited. The influence of added non-hydrolysable salt, acid, or base in the sliding water drops as well as the surrounding humidity on surface electrification and charge formation is also not yet fully understood. Here, we measure the charging on hydrophobic solid surfaces (coated with PFOTS or PDMS) by sliding drops with varying concentration for different types of solutions. Solutions of NaCl, CaCl₂, KNO₃, HCl, and NaOH, were studied whose concentrations varied in a range of 0.01 to 100 mM. The charge increased slightly at low concentrations and decreased at higher concentrations. We attribute this decrease to

SUBMITTER: Sbeih S 

PROVIDER: S-EPMC10792611 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature