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29 August 2008 DNA-templated nanowires as sacrificial materials for creating nanocapillaries
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Proceedings Volume 7035, Biosensing; 70350H (2008)
Event: NanoScience + Engineering, 2008, San Diego, California, United States
DNA has shown great promise as a template for the controlled localization of various materials and the construction of wires with nanometer-dimension cross sections. We have recently developed a strategy for fabrication of nanocapillaries, using DNA-templated nanowires as a sacrificial material. We first form metal nanowires through the selective electrochemical deposition of nickel atop a surface-aligned DNA molecule. We then deposit a thin layer of silicon dioxide on top of the DNA nanostructures. Next, we photolithographically pattern openings over the ends of the wires and etch through the silicon dioxide layer to expose the metal nanowires. Finally, we etch out the DNA-templated nickel nanowires. This process results in the formation of nanocapillaries having the same dimensions as the originally formed DNA-templated nanowires. We have characterized these DNA-templated nanocapillaries using atomic force microscopy, optical microscopy and scanning electron microscopy. These constructs have potential for application in nanofluidics, power generation, sample preconcentration, and chemical sensing.
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Jacob T. Stewart, Hector A. Becerril, Weichun Yang, Megan G. Larsen, and Adam T. Woolley "DNA-templated nanowires as sacrificial materials for creating nanocapillaries", Proc. SPIE 7035, Biosensing, 70350H (29 August 2008);

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