Conversion Between Two-Dimensional Square and Hexagonal Close-Packed Architectures in Aggregates of Au Nanoparticles Mediated by Bending DNA Linkers

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DNA linkers with different bending angles were employed to mediate the conversion between the 2D hexagonal close-packed (hcp) and square architectures in the aggregates of 13 nm Au nanoparticles directed by oligo-DNA. For terminus thiol-modified (TM) oligo-DNA oriented almost perpendicularly on the particle surface, the architecture is converted from hcp to square with increased bending angle of the linker molecules as a result of increased steric effect. For phosphate backbone sulfur modified (PM) oligo-DNA loaded approximately parallel on the particle surface, the architecture is converted from square to hcp with increased bending angle of the linkers as a result of the decreased steric effect.


Document Type: Research Article


Publication date: March 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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