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Schematic of AuNP-DNAt-MNP sandwich structure. (A) The presence of specific DNAt (red wavy bar) will covalently bind with DNAt specific probes (black wavy lines) on AuNP (red Au labeled bead) and the MNP (grey M labeled bead), allowing the collection of AuNP. (B) Absence of specific DNAt will lead to the failure of AuNP collection (image used with permission from Michael J. Anderson at Michigan State University, 2012).
