As used herein, an S— group bound to {HEAD ~ a metal surface} is defined as including both a presence and {TAIL ~ an absence} of the thiol hydrogen 
As used herein , an S — group bound to { HEAD ~ a metal surface } is defined as including both a presence and { TAIL ~ an absence } of the thiol hydrogen
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 TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH