The system 3, wherein {HEAD ~ the working electrode} is made of {TAIL ~ polyaniline} or polypyrrole 
is made of
The system 3 , wherein { HEAD ~ the working electrode } is made of { TAIL ~ polyaniline } or polypyrrole
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH