一个纳米尺度的电子开关,由金属集群和可回氧定位组组成
D I Gittins1, D Bethell, D J Schiffrin
1Centre for Nanoscale Science, Department of Chemistry, University of Liverpool, UK.
Nature
|November 18, 2000
概括
研究人员使用氧化还原活性有机分子将金纳米颗粒与电极表面连接起来. 这一突破可以控制电子传输,为新型纳米电子开关铺平了道路.
科学领域:
- 纳米技术纳米技术
- 分子电子学分子电子学
- 材料科学 材料科学 材料科学
背景情况:
- "自下而上"制造方法旨在创建分子级电子设备,但控制电子传输是一个关键的挑战.
- 具有氧化还原中心的有机分子显示出对共振道的承诺,但很难整合到复杂的组件中.
- 功能化的金属纳米粒子提供单个电子特征和自组装能力,吸引纳米电子的兴趣.
研究的目的:
- 为了研究使用氧化还原活性有机分子将金属纳米粒子附着到电极表面.
- 用这些分子链接器来证明使用这些分子链接器对金属纳米粒子之间的电子传输的控制.
- 探索这个系统开发纳米电子开关的潜力.
主要方法:
- 使用扫描道显微镜 (STM) 来测量电子传输.
- 使用的金纳米集群与聚甲链和中央比皮里迪尼部分功能化.
- 通过氧化还原活性分子研究了纳米粒子和电极之间的电子接触和道化特性.
主要成果:
- 通过使用功能化有机分子,成功将金纳米集群连接到电极表面.
- 证明了氧化还原活性分子可以控制纳米粒子之间的电子运输.
- 观察到,将电荷注入到分子中会极大地改变道化特性.
结论:
- 氧化还原活性有机分子可以有效地将金属纳米粒子与电极表面连接起来.
- 这种分子桥梁允许控制电子运输,这是纳米尺度设备功能中的关键因素.
- 开发的系统为通过操纵分子电荷状态来创建先进的纳米电子开关提供了基础.
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