Programmable periodicity of quantum dot arrays with DNA origami nanotubes.

Hieu Bui, Craig Onodera, Carson Kidwell, YerPeng Tan, Elton Graugnard, Wan Kuang, Jeunghoon Lee, William B Knowlton, Bernard Yurke, William L Hughes

Index: Nano Lett. 10(9) , 3367-72, (2010)

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Abstract

To fabricate quantum dot arrays with programmable periodicity, functionalized DNA origami nanotubes were developed. Selected DNA staple strands were biotin-labeled to form periodic binding sites for streptavidin-conjugated quantum dots. Successful formation of arrays with periods of 43 and 71 nm demonstrates precise, programmable, large-scale nanoparticle patterning; however, limitations in array periodicity were also observed. Statistical analysis of AFM images revealed evidence for steric hindrance or site bridging that limited the minimum array periodicity.