About: http://webisa.webdatacommons.org/434513603

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	However, functional graphene RF circuits such as frequency doublers and mixers operating in the gigahertz range is yet to demonstrated.
http://www.w3.org/ns/prov#wasQuotedFrom	science.gov