Selective Discharge of Electrostatic Charges on Electrets Using a Patterned Hydrogel Stamp

摘要

Electrets, materials that can permanently store charge, have a long history in engineering and condensed-matter physics. Recently, the field has drawn growing attention from the field of chemistry, especially after the hot debate between two renowned chemists, George Whitesides and Allen Bard, on the mechanism of contact electrification of dielectrics. Although the argument of charge transfer on tribocharging, either electrons or ions, is controversial and has not yet reached a consensus, the thorough investigation of the electrostatic phenomenon from both sides will still pave the way for other chemists and stimulate the exploitations for new application of electrets.