Large-Scale Formation of DNA Origami Lattices on Silicon
Tapio, K., Kielar, C., Parikka, J. M., Keller, A., Järvinen, H., Fahmy, K., & Toppari, J. J. (2023). Large-Scale Formation of DNA Origami Lattices on Silicon. Chemistry of Materials, 35(5), 1961-1971. https://doi.org/10.1021/acs.chemmater.2c03190
Published inChemistry of Materials
DisciplineNanoscience CenterNanoscience Center
© The Authors. Published by American Chemical Society
In recent years, hierarchical nanostructures have found applications in fields like diagnostics, medicine, nano-optics, and nanoelectronics, especially in challenging applications like the creation of metasurfaces with unique optical properties. One of the promising materials to fabricate such nanostructures has been DNA due to its robust self-assembly properties and plethora of different functionalization schemes. Here, we demonstrate the assembly of a two-dimensional fishnet-type lattice on a silicon substrate using cross-shaped DNA origami as the building block, i.e., tile. The effects of different environmental and structural factors are investigated under liquid atomic force microscopy (AFM) to optimize the lattice assembly. Furthermore, the arm-to-arm binding affinity of the tiles is analyzed, revealing preferential orientations. From the liquid AFM results, we develop a methodology to produce closely-spaced DNA origami lattices on silicon substrate, which allows further nanofabrication process steps, such as metallization. This formed polycrystalline lattice has high surface coverage and is extendable to the wafer scale with an average domain size of about a micrometer. Further studies are needed to increase the domain size toward a single-crystalline large-scale lattice. ...
PublisherAmerican Chemical Society (ACS)
ISSN Search the Publication Forum0897-4756
Publication in research information system
MetadataShow full item record
Related funder(s)Academy of Finland
Funding program(s)Researcher mobility Funding, AoF
Additional information about fundingFunding from Jane and Aatos Erkko Foundation (190028), Deutsche Forschungsgemeinschaft DFG (469036492), and Academy of Finland (#330584/350797) is gratefully acknowledged.
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