The method 2, wherein said {HEAD ~ metal nanowires} are selected from {TAIL ~ nanowires} of a transition metal or an alloy of a transition metal 
are selected from
The method 2 , wherein said { HEAD ~ metal nanowires } are selected from { TAIL ~ nanowires } of a transition metal or an alloy of a transition metal
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH