Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
32140 | Nano Today | 2013 | 30 Pages |
We review recent progress on the assembly of metal nanocrystals using dithiol and DNA based bifunctional linkers to create discrete plasmonic superstructures. The structures formed include one-dimensional linear arrays, two-dimensional trimers and tetramers as well as stable three-dimensional assemblies built up on a substrate. We outline specific aspects and challenges within the DNA-assembly technique, including control of the desired interparticle spacing. The optical properties of a number of general classes of assemblies are described and the consequences of symmetry-breaking, such as the formation of Fano-like resonances. The assembly and optical properties of unique three-dimensional structures are described along with a hybrid top-down and bottom-up technique for obtaining long, linear arrays of crystalline metal nanoparticles.
Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (126 K)Download as PowerPoint slideHighlights► We review recent progress on the assembly of metal nanocrystals using DNA. ► We demonstrate that 1D, 2D and 3D structures can be assembled. ► We discuss the major challenge of controlling the particle spacing. ► We discuss the unique optical properties of these structures. ► We propose the use of novel top-down and bottom-up hybrid methods for engineering more complex plasmonic superstructures.