These particles, however, have {HEAD ~ silicon} on the surface, which contributes to {TAIL ~ improved dispersibility} 
These particles , however , have { HEAD ~ silicon } on the surface , which contributes to { TAIL ~ improved dispersibility }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL