Argonne National Laboratory Center for Nanoscale Materials U.S. Department of Energy

Reusable template for the production of nanowires

TEM of SOI stressor structure

Scanning electron micrograph image showing platinum wires being lifted away from the surface of the UNCD electrode. Inset: Higher magnification image showing a single ring of platinum removed from the UNCD surface.

Scientists from CNM's Nanofabrication Group, working with users from the University of Wisconsin-Stevens Point, discovered a fast, simple, scalable technique for solution-based, electrochemical synthesis of patterned metallic and semiconducting nanowires from a reusable, nonsacrificial, ultrananocrystalline diamond (UNCD) template.

The process involves fabrication of wafer-level electrochemical cells consisting of alternating insulating and conducting UNCD thin films. Unique electrochemical properties of electrically conducting nitrogen incorporated UNCD not only provide a robust electrode platform for electro-deposition of micro/nanowires of various materials, but also facilitate easy peeling-off of deposited micro/nanowires for repeat use. This bench-top technique is easy and quickly produces patterned nanowires on a large scale with diameters that are not predefined by the template, and do not require vacuum or clean-room processing. This offers a path for studying nanoscale phenomena and allows for process-scale development of a new generation of nanowire-based devices.

Applied Material Interfaces April 2011D.B. Seley et al., “Electroplate and Lift Lithography for Patterned Micro/Nanowires Using Ultrananocrystalline Diamond (UNCD) as a Reusable Template,” ACS Appl. Mater. Interfaces, 3(4), 925-930 (2011) DOI: 10.1021/am101226w (online)

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May 2011

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