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Appl. Phys. Lett. 91, 083902 (2007); http://dx.doi.org/10.1063/1.2772762 (3 pages)

High density single molecule surface patterning with colloidal epitaxy

Jerrod J. Schwartz and Stephen R. Quake

Department of Bioengineering, Stanford University and Howard Hughes Medical Institute, Stanford, California 94305

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(Received 11 May 2007; accepted 27 July 2007; published online 21 August 2007)

Simple and inexpensive methods for dense surface patterning of single molecules will help realize the massive potential throughput of molecular arrays in biology and nanoscience. To surpass the resolvable density limit imposed by random deposition, the authors have developed a method that uses colloids to pattern single molecules at a fixed length scale. They demonstrate the ability to pattern fluorescently labeled DNA such that ∼ 38% of the available diffraction-limited regions contain exactly one molecule. This density is slightly less than the theoretical limit suggested by Monte Carlo simulations but surpasses the random deposition limit by more than threefold.

© 2007 American Institute of Physics

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0003-6951 (print)  
1077-3118 (online)

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