Zhong Jin, Wei Sun, Yonggang Ke, Chih-Jen Shih, Geraldine L.C. Paulus, Qing Hua Wang, Bin Mu, Peng Yin, Michael S. Strano
Nature Communications. doi: 10.1038/ncomms2690, 4, 1663 (2013).
Downloads: PDF, 9 pages.
The vision for grapheme and other two-dimensional electronics is the direct production of nano electronic circuits and barrier materials from a single precursor sheet. DNA origami and single-stranded tiles are powerful methods to encode complex shapes within a DNA sequence, but their translation to patterning other nano materials has been limited. Here we develop a metallized DNA nano lithography that allows transfer of spatial information to pattern two-dimensional nanomaterials capable of plasma etching. Width, orientation and curvature can be programmed by specific sequence design and transferred, as we demonstrate for grapheme. Spatial resolution is limited by distortion of the DNA template upon Au metallization and subsequent etching. The metallized DNA mask allows for plasmonic enhanced Raman spectroscopy of the underlying grapheme, providing information on defects, doping and lattice symmetry. This DNA nano lithography enables wafer-scale patterning of two-dimensional electronic materials to create diverse circuit elements, including nano rings, three- and four-membered nanojunctions, and extended nanoribbons.
Supplementary material:PDF, 3 pages
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