It is believed that the nano ZnO particles are interacting with {HEAD ~ the TiO2} to form {TAIL ~ a more efficient dispersion} 
to form
It is believed that the nano ZnO particles are interacting with { HEAD ~ the TiO2 } to form { TAIL ~ a more efficient dispersion }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL