A typical single color preparation of {HEAD ~ nanoparticles} has {TAIL ~ crystals} that are preferably of substantially identical size and shape 
A typical single color preparation of { HEAD ~ nanoparticles } has { TAIL ~ crystals } that are preferably of substantially identical size and shape
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH