monitoring the characteristics of the plurality of sensor areas with respect to {HEAD ~ one parameter} which varies on {TAIL ~ the basis} of the accumulation of the nanoparticles , 
varies on
monitoring the characteristics of the plurality of sensor areas with respect to { HEAD ~ one parameter } which varies on { TAIL ~ the basis } of the accumulation of the nanoparticles ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH