Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801, USA.
Science. 2010 Sep 10;329(5997):1327-30. doi: 10.1126/science.1194210.
The desorption of gases from carbon nanotubes is usually a slow process that limits the nanotubes' utility as sensors or as memristors. Here, we demonstrate that flow in the nanotube above the Poole-Frenkel conduction threshold can stimulate adsorbates to desorb without heating the sensor substantially. The method is general: alcohols, aromatics, amines, and phosphonates were all found to desorb. We postulate that the process is analogous to electron-stimulated desorption, but with an internally conducted rather than externally applied source of electrons.
碳纳米管中气体的解吸通常是一个缓慢的过程，这限制了纳米管作为传感器或忆阻器的应用。在这里，我们证明了在高于 Poole-Frenkel 传导阈值的纳米管中流动可以在不显著加热传感器的情况下刺激吸附物解吸。该方法具有普遍性：醇、芳烃、胺和膦酸酯都被发现可以解吸。我们推测该过程类似于电子刺激解吸，但电子源是内部传导的，而不是外部施加的。
