Applied Physics

Nanofiber Tightrope

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Science  22 Mar 2002:
Vol. 295, Issue 5563, pp. 2181
DOI: 10.1126/science.295.5563.2181b

Probing the electronic and electromechanical properties of nanowires and nanofibers often requires delicate manipulation and advanced lithographic and deposition processes. In addition, because of chemical instabilities or limiting factors of fiber deposition, such processes are not always compatible with the materials of interest. Kim et al. demonstrate a general technique for the formation of suspended nanofibers. They mark out the top of a substrate with locator points and then deposit a photosensitive polymer that is used as a sacrificial layer. The nanofiber is placed on this polymer layer, its position is noted, and a further polymer layer is deposited that fully encapsulates the nanofiber. Local regions surrounding the nanofiber can be removed at points along its length by usual lithographic processes, and then those holes are filled in with metal. Finally, the remaining polymer is washed away, leaving the nanofiber suspended between the two metallic pillars. — ISO

Appl. Phys. Lett. 80, 1815 (2002).

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