Lee Jeong-O, Lientschnig Günther, Wiertz Frank G H, Struijk Martin, Janssen Réne A J, Egberink Richard, Reinhoudt David N, Grimsdale Andrew C, Müllen Klaus, Hadley Peter, Dekker Cees
Department of Nanoscience and DIMES, Delft University of Technology, Delft, The Netherlands.
Ann N Y Acad Sci. 2003 Dec;1006:122-32. doi: 10.1196/annals.1292.008.
We fabricated three-terminal devices with conjugated molecules. Two different device layouts were used to measure both very short molecules (with one or two benzene rings) and relatively long ones (as long as 8 nm). To achieve an optimum gate effect, we used aluminum gates covered with a very thin native oxide layer. Molecules with thiol end groups were positioned between the source and drain electrodes by self-assembly. The device yield was low for short molecules, most likely due to defects in the self-assembled monolayers. Most of the devices made with short molecules did not show any gate effect at all; a small gate effect was only observed in two samples made with 1,3-benzenedithiol. Some devices showed clear negative differential conductance peaks. In some devices made with long molecules, we observed a small change of conductance with gate voltage.
我们用共轭分子制造了三端器件。采用了两种不同的器件布局来测量极短的分子（含有一个或两个苯环）和相对较长的分子（长达8纳米）。为了实现最佳的栅极效应，我们使用了覆盖有非常薄的天然氧化层的铝栅极。带有硫醇端基的分子通过自组装定位在源极和漏极电极之间。短分子器件的成品率较低，很可能是由于自组装单分子层中的缺陷。大多数用短分子制成的器件根本没有显示出任何栅极效应；仅在两个用1,3 - 苯二硫醇制成的样品中观察到了小的栅极效应。一些器件显示出明显的负微分电导峰。在一些用长分子制成的器件中，我们观察到电导随栅极电压有小的变化。
