About: http://webisa.webdatacommons.org/204407169

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	These references also suggest the advantage of a coating or monolayer of an alkali metal, or other material, on the emitting electrode in order to achieve a low work function in the transfer of electrons from one electrode to the other.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com