removing at least one portion of the plurality of carbon nanotubes to expose at least one portion of {HEAD ~ the semiconductor substrate} within {TAIL ~ the plurality} of carbon nanotubes 
within
removing at least one portion of the plurality of carbon nanotubes to expose at least one portion of { HEAD ~ the semiconductor substrate } within { TAIL ~ the plurality } of carbon nanotubes
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH