Kjetil Gjerde et al 2006 Nanotechnology 17 4917 doi:10.1088/0957-4484/17/19/023
Kjetil Gjerde1,4, Jakob Kjelstrup-Hansen1, Casper H Clausen1, Kenneth B K Teo2, William I Milne2, Horst-Günter Rubahn3 and Peter Bøggild1
Show affiliationsThe ubiquitous static friction (stiction) and adhesion forces comprise a major obstacle in the manipulation of matter at the nanoscale (Falvo et al 1999 Nature 397 236; Urbakh M et al 2004 Nature 430 525). In this work it is shown that a surface coated with vertically aligned carbon nanotubes—a nanotube forest—acts as an effective non-stick workbench for the manipulation of micro-objects and fibres/wires with one or more dimensions in the nano-range. These include organic nanofibres (Balzer and Rubahn 2001 Appl. Phys. Lett. 79 3860) and microsized latex beads, which adhere strongly even to a conventional low surface-energy material like Teflon. Although organic nanofibres are attractive as device components due to their chemical adaptability, adhesion forces nearly always rule out manipulation as a route to assembly of prototype devices based on such materials, because organic materials are soft and fragile, and tend to stick to any surface. We demonstrate here that the nanotube forest due to its roughness not only exhibits very low stiction and dynamic friction; it also acts as a springy and mechanically compliant surface, making it possible to lift up and manipulate delicate nanostructures such as organic nanofibres in ways not possible on planar, rigid surfaces.
62.25.-g Mechanical properties of nanoscale systems
68.37.Hk Scanning electron microscopy (SEM) (including EBIC)
Issue 19 (14 October 2006)
Received 29 May 2006, in final form 9 August 2006
Published 11 September 2006
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