Any of {HEAD ~ the carbon layer} adhering to {TAIL ~ the silicon layer} is easily removable to provide the silicon layer separate from the substrate 
Any of { HEAD ~ the carbon layer } adhering to { TAIL ~ the silicon layer } is easily removable to provide the silicon layer separate from the substrate
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH