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