wherein the plurality of sensor areas are made available, and are sensitive to nanoparticles of different sizes and the plurality of sensor areas have a specificity to {HEAD ~ specific size classes} of {TAIL ~ nanoparticles} 
of
wherein the plurality of sensor areas are made available , and are sensitive to nanoparticles of different sizes and the plurality of sensor areas have a specificity to { HEAD ~ specific size classes } of { TAIL ~ nanoparticles }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL