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. Author manuscript; available in PMC: 2010 Jan 1.
Published in final edited form as: Nano Lett. 2009 Jan;9(1):317–321. doi: 10.1021/nl8030482

Figure 3.

Figure 3

A) Diagram (for a ‘two-particle’ model) showing that “slipping” interactions are not as likely with DNA functionalized-Au prisms (particle A is functionalized with TCGC–, while particle B is functionalized with TGCG–, prisms presented edge on). In contrast, note that, for the same DNA sequences immobilized on AuNPs, “slipping” interactions occur (Scheme 1B). Black lettering indicates bases involved in normal Watson-Crick interactions and white lettering indicates bases that are not involved in hybridization. B) Melting transitions (monitored at 260 nm) for aggregates of DNA-Au triangular prisms functionalized with sequences containing 2 base pair recognition elements (TCG– or TGC–). Similar melting behavior also was observed at 900 nm.