About: http://webisa.webdatacommons.org/306779997

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	The micro-probe tip is typically made of such materials as silicon (Si) or silicon nitride (Si3 N4), and may have a radius of curvature of about 50 nm.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com