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Self-assembled switches based on electroactuated multiwalled nanotubes
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View: Figures


Image of FIG. 1.
FIG. 1.

Schematics of the fabrication process, starting with a reactive ion etching step. (a) The etched groove is partially filled with a electrode. (b) Perpendicular aminopropyltriethoxysilane (APTS) tracks define the preferential MWNT adsorption sites. (c) Single MWNT are positioned perpendicularly above the buried electrode. Microscopic leads then connect the MWNT to the contact pads in a doubly (d) or singly (e) clamped configuration. The final exposure to molecule solutions results in the formation of an ordered layer between the buried electrode and the suspended nanotube in either configuration.

Image of FIG. 2.
FIG. 2.

(a) AFM image of a MWNT on an APTS stripe across a trench corresponding to fabrication step (c). (b) AFM image of a CNT-NEMS in a doubly clamped geometry [step (d)]. The buried gold electrode is wide, below the surface level. A single long MWNT, in diameter is suspended perpendicularly above the gold electrode and recontacted with gold leads.

Image of FIG. 3.
FIG. 3.

Electrical measurements of a singly clamped MWNT in a cantilever geometry (log and linear scale). The arrows indicate the direction in the hysteresis cycle. The current increases suddenly from zero to a high value when the tube jumps in contact with the bottom electrode.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Self-assembled switches based on electroactuated multiwalled nanotubes