Pyramidal and Chiral Groupings of Gold Nanocrystals Assembled Using DNA Scaffolds

Nanostructures constructed from metal and semiconductor nanocrystals conjugated to and organized by DNA are an emerging class of materials with collective optical properties. We created discrete pyramids of DNA with gold nanocrystals at the tips. By taking small-angle X-ray scattering measurments fr...

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Bibliographic Details
Published inJournal of the American Chemical Society Vol. 131; no. 24; pp. 8455 - 8459
Main Authors Mastroianni, Alexander J, Claridge, Shelley A, Alivisatos, A. Paul
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 24.06.2009
Subjects
DNA - chemistry
Gold - chemistry
Metal Nanoparticles - chemistry
Microscopy, Electron, Transmission
Models, Molecular
Nanostructures - chemistry
Nucleic Acid Conformation
Scattering, Small Angle
Solutions
X-Ray Diffraction
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Summary:Nanostructures constructed from metal and semiconductor nanocrystals conjugated to and organized by DNA are an emerging class of materials with collective optical properties. We created discrete pyramids of DNA with gold nanocrystals at the tips. By taking small-angle X-ray scattering measurments from solutions of these pyramids, we confirmed that this pyramidal geometry creates structures which are more rigid in solution than linear DNA. We then took advantage of the tetrahedral symmetry to demonstrate construction of chiral nanostructures.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja808570g