Conversion between two-dimensional square and hexagonal close-packed architectures in aggregates of Au nanoparticles mediated by bending DNA linkers.
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.
Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, Changchun 130012, PR China.
Yudan
Y
Ma
Lin
L
Jiang
Lili
L
Zhao
Yi
Y
Guo
Wensheng
W
Yang
D004247:DNA / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D008956:Models, Chemical; D009690:Nucleic Acid Conformation; D009693:Nucleic Acid Hybridization; D009838:Oligodeoxyribonucleotides / Q000737:chemistry*
D009838:Oligodeoxyribonucleotides; D006046:Gold; D004247:DNA