The devices comprise a body formed of a polymeric backbone having {HEAD ~ a repeating unit} of a hydrocarbon radical and symmetrical dioxycarbon unit with {TAIL ~ a multiplicity} of organic groups bonded thereto 
The devices comprise a body formed of a polymeric backbone having { HEAD ~ a repeating unit } of a hydrocarbon radical and symmetrical dioxycarbon unit with { TAIL ~ a multiplicity } of organic groups bonded thereto
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH