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在纳米基因中引发拓缺陷的磁性

Shantanu Mishra¹, Doreen Beyer², Reinhard Berger²

¹nanotech@surfaces Laboratory , Empa - Swiss Federal Laboratories for Materials Science and Technology , Dübendorf 8600 , Switzerland.

Journal of the American Chemical Society

|January 7, 2020

概括

研究人员通过表面反应合成了两种具有独特磁性特性的新型纳米基因. 一个纳米基因表现出边缘磁性,而另一个则表现出由于拓缺陷而产生的磁性.

科学领域:

材料科学
有机化学
凝聚物质物理学

背景情况:

在表面合成使得复杂的分子结构的创建.
纳米基是基于碳的材料,具有可调节的电子和磁性特性.
控制所有碳系统中的磁性是分子自旋电子学的一个关键挑战.

研究的目的:

为了研究10--10' - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9,9' - - - - - - - - - - - - - 在Au' - - - - - - - - - - - - - - 的表面反应.
合成和描述具有全碳磁性的新型开纳米基因.
探索纳米基因结构和磁性特性之间的关系.

主要方法:

扫描道显微镜 (STM) 和光谱 (STS).
在黄金表面进行表面合成.
密度函数理论 (DFT) 的计算.

主要成果:

合成了两个不同的开纳米基因,1a和1b.
纳米基1a具有类似三角基的末端,显示边缘局部化状态和低边界间隙,表明边缘磁性.
主导产品纳米基1b具有五边形环缺陷,导致通过Kondo共振检测到非Kekulé结构的不配对旋转.

结论:

表面反应为设计具有定制磁性功能的复杂纳米基因提供了途径.
结构缺陷,如五边形环,可以诱导纳米基因的独特磁性行为.
这些发现有助于分子自旋电子学和新型磁性材料的发展.

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