在单个碳纳米管场效应晶体管上指导和感知分子构造的变化
Xuefeng Guo1, Limin Huang, Stephen O'Brien
1The Nanoscience Cente, Columbia University, New York, New York 10027, USA.
Journal of the American Chemical Society
|October 27, 2005
概括
研究人员为碳纳米管表面开发了功能分子. 这些分子,由光控制,切换形状,使光响应电子设备用于分子检测.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 超分子化学 超分子化学
背景情况:
- 碳纳米管 (CNT) 具有独特的电子特性.
- 控制CNT表面上的分子组合对于先进的应用至关重要.
- 可光切换的分子提供了对分子状态的外部控制.
研究的目的:
- 用可光切换分子使单壁碳纳米管 (SWCNT) 表面具有功能.
- 为了研究表面结合分子的光诱导的构造变化.
- 开发基于SWCNT的场效应晶体管 (FET) 来检测分子光交换.
主要方法:
- 合成具有可光切换头组和表面指导功能组的分子.
- 这些分子的组装在SWCNT表面上.
- 制造和特征的SWCNT FET设备.
- 对分子构造的光学控制和设备导电率变化的监测.
主要成果:
- 通过可光切换分子成功实现SWCNT表面的功能化.
- 在分子形状 (开放和关闭状态) 之间展示光诱导的可逆切换.
- 观察SWCNT FET电导率 (高和低状态) 的相应变化.
- 设备对大约10^4个分子的光交换事件的检测.
结论:
- 可以有效地与SWCNT FETs的电子性质相结合,以光定位的分子构造变化.
- 这种方法使得基于可光开关功能化的敏感分子传感器的开发成为可能.
- 这项研究表明了创建光控制纳米电子设备的途径.
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