Thus, the nanoparticles and {TAIL ~ TiO2} interact by a mechanism resulting in {HEAD ~ improved spacing} of the TiO2 particles 
Thus , the nanoparticles and { TAIL ~ TiO2 } interact by a mechanism resulting in { HEAD ~ improved spacing } of the TiO2 particles
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH