Surface charges are ubiquitous in nature and their existence is in many forms.For example,at macro-length scale,by contacting and separating two objects,i.e.,contact electrification,one is able to obtain static surfac...Surface charges are ubiquitous in nature and their existence is in many forms.For example,at macro-length scale,by contacting and separating two objects,i.e.,contact electrification,one is able to obtain static surface charges.At micro-length scale,electric charges can be found at the air–water interface of a microdroplet because of the triboelectric effect or ionization from high-voltage spray fission.Although static surface charge is a familiar subject,much still remains unknown about how and why such charges form.Contact charge exchange between two metals is known to result from the transfer of electrons.But when at least one of the materials is an insulator or liquid,there is no general understanding of what carries charges from one surface to the other.展开更多
基金supported by the National Natural Science Foundation of China (21603026)Max-Planck-Gesellschaft (Max Planck Partner Group UESTC-MPIP)the ERC advanced grant 340391SUPRO。
文摘Surface charges are ubiquitous in nature and their existence is in many forms.For example,at macro-length scale,by contacting and separating two objects,i.e.,contact electrification,one is able to obtain static surface charges.At micro-length scale,electric charges can be found at the air–water interface of a microdroplet because of the triboelectric effect or ionization from high-voltage spray fission.Although static surface charge is a familiar subject,much still remains unknown about how and why such charges form.Contact charge exchange between two metals is known to result from the transfer of electrons.But when at least one of the materials is an insulator or liquid,there is no general understanding of what carries charges from one surface to the other.
