At least two of {HEAD ~ the plurality} of {TAIL ~ intermediate layers} are interdiffused, and material of the at least two of the plurality of intermediate layers that are interdiffused is present in the nanostructure 
of
At least two of { HEAD ~ the plurality } of { TAIL ~ intermediate layers } are interdiffused , and material of the at least two of the plurality of intermediate layers that are interdiffused is present in the nanostructure
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH