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