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