Abstract
There is continued interest in finding quicker and simpler ways to fabricate nanowires, even though research groups have been investigating possibilities for the past decade. There are two reasons for this interest: first, nanowires have unusual properties—for example, they show quantum-mechanical confinement effects1, they have a very high surface-to-volume ratio, enabling them to be used as sensors2, and they have the ability to connect to individual molecules3. Second, no simple method has yet been found to fabricate nanowires over large areas in arbitrary material combinations. Here we describe an approach to the generation of well-defined nanowire network structures on almost any solid material, up to macroscopic sample sizes. We form the nanowires within cracks in a thin film. Such cracks have a number of properties that make them attractive as templates for nanowire formation: they are straight, scalable down to nanometre size, and can be aligned (by using microstructure to give crack alignment via strain). We demonstrate the production of nanowires with diameter <16 nm, both singly and as networks; we have also produced aligned patterns of nanowires, and nanowires with individual contacts.
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Acknowledgements
We thank J. Kruse for help with the gold deposition. This work was supported in part by the DFGF-orschergruppe 353/2-1 and the Technologiestiftung Schleswig-Holstein, project 2002-11.
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Adelung, R., Aktas, O., Franc, J. et al. Strain-controlled growth of nanowires within thin-film cracks. Nature Mater 3, 375–379 (2004). https://doi.org/10.1038/nmat1128
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DOI: https://doi.org/10.1038/nmat1128
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