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TEM images of bundles of DNA-linked GNRs. (A) The three-strand (B) two-strand DNA linking systems. UV-vis spectra of (C) a suspension of non-complementary DNA functionalized NRs and (D) the two-strand NR system before (—) and after (····) duplexation at 25°C. Reproduced with permission from Reference (253). Royal Society of Chemistry, London, Copyright (2001).
