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Updated: Jun 23, 2026

Stable DNA Motifs, 1D and 2D Nanostructures Constructed from Small Circular DNA Molecules
Published on: April 12, 2019
Conversion between two-dimensional square and hexagonal close-packed architectures in aggregates of Au nanoparticles
Yudan Ma1, Lin Jiang, Lili Zhao
1Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, Changchun 130012, PR China.
Abstract:
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.
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