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Published December 2013 | Supplemental Material
Journal Article Open

Epitaxial Growth of DNA-Assembled Nanoparticle Superlattices on Patterned Substrates


DNA-functionalized nanoparticles, including plasmonic nanoparticles, can be assembled into a wide range of crystalline arrays via synthetically programmable DNA hybridization interactions. Here we demonstrate that such assemblies can be grown epitaxially on lithographically patterned templates, eliminating grain boundaries and enabling fine control over orientation and size of assemblies up to thousands of square micrometers. We also demonstrate that this epitaxial growth allows for orientational control, systematic introduction of strain, and designed defects, which extend the range of structures that can be made using superlattice assembly. Ultimately, this will open the door to integrating self-assembled plasmonic nanoparticle materials into on-chip optical or optoelectronic platforms.

Additional Information

© 2013 American Chemical Society. Received: September 9, 2013. Revised: November 6, 2013. Publication Date (Web): November 8, 2013. S.L.H. thanks the Caltech KNI staff for training and equipment expertise; Tiffany Kimoto and Jennifer Blankenship for excellent support; and Dr. Matt Sheldon for technical expertise. H.A.A. and C.A.M. are grateful for funding through the Bioprogrammable One-, Two-, and Three-Dimensional Materials no. FA9550-11-1-0275 MURI. C.A.M. also acknowledges support from the AFOSR (FA9550-12-1-0280) and the DOE (611-8289300-60024682-01) through the NU Non-Equilibrium Research Center. Use of the Advanced Photon Source at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. The authors declare no competing financial interest.

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