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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Chemoresponsive monolayer transistors
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Chemoresponsive monolayer transistors

机译：化学反应单层晶体管

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This work details a method to make efficacious field-effect transistors from monolayers of polycyclic aromatic hydrocarbons that are able to sense and respond to their chemical environment. The molecules used in this study are functionalized so that they assemble laterally into columns and attach themselves to the silicon oxide surface of a silicon wafer. To measure the electrical properties of these monolayers, we use ultrasmall point contacts that are separated by only a few nanometers as the source and drain electrodes. These contacts are formed through an oxidative cutting of an individual metallic single-walled carbon nanotube that is held between macroscopic metal leads. The molecules assemble in the gap and form transistors with large current modulation and high gate efficiency. Because these devices are formed from an individual stack of molecules, their electrical properties change significantly when exposed to electron-deficient molecules such as tetracyanoquinodimethane (TCNQ), forming the basis for new types of environmental and molecular sensors.
机译：这项工作详述了一种由多环芳烃单层制造有效场效应晶体管的方法，该单层能够感知并响应其化学环境。此研究中使用的分子经过功能化，因此它们可以横向组装成圆柱体，并将其自身附着到硅片的氧化硅表面。为了测量这些单层的电性能，我们使用仅相隔数纳米的超小点接触作为源电极和漏电极。这些接触是通过对宏​​观金属引线之间固定的单个金属单壁碳纳米管进行氧化切割而形成的。分子在间隙中组装并形成具有大电流调制和高栅极效率的晶体管。由于这些设备是由单独的分子堆叠形成的，因此当暴露于缺乏电子的分子（例如四氰基喹二甲烷（TCNQ））时，其电性能会发生显着变化，从而为新型环境传感器和分子传感器奠定了基础。

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