Next, the nucleic acid bound to {HEAD ~ the substrate} is contacted with a first type of nanoparticles having {TAIL ~ oligonucleotides} attached thereto 
Next , the nucleic acid bound to { HEAD ~ the substrate } is contacted with a first type of nanoparticles having { TAIL ~ oligonucleotides } attached thereto
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH