Preferably the nanoscale particles have {HEAD ~ an average particle size} of {TAIL ~ less than about 50 nm}, more preferably less than about 10 nm 
of
Preferably the nanoscale particles have { HEAD ~ an average particle size } of { TAIL ~ less than about 50 nm } , more preferably less than about 10 nm
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH