Band Formation from Coupled Quantum Dots Formed by a Nanoporous Network on a Copper Surface
Band Formation from Coupled Quantum Dots Formed by a Nanoporous Network on a Copper Surface
复制标题
DOI：
10.1126/science.1175141
复制
发表时间：
2009-07-17
期刊：
影响因子：
56.9
通讯作者：
Stoehr, Meike
中科院分区：
文献类型：
--
作者：
Lobo-Checa, Jorge;Matena, Manfred;Stoehr, Meike
结晶固体的性质在很大程度上可以从耦合量子系统（如原子和分子）的周期性阵列的尺度和维数推导出来。二维周期性量子限制在表面上一直是难以捉摸的，主要是因为制造可以捕获电子态的规则纳米图案结构的挑战。我们报道了Cu（111）表面态的二维自由电子气可以被捕获在有机纳米多孔网络的孔内，该网络可以被视为量子点的规则阵列。此外，形成了浅色散电子能带结构，这表明相邻孔隙状态之间的电子耦合。
The properties of crystalline solids can to a large extent be derived from the scale and dimensionality of periodic arrays of coupled quantum systems such as atoms and molecules. Periodic quantum confinement in two dimensions has been elusive on surfaces, mainly because of the challenge to produce regular nanopatterned structures that can trap electronic states. We report that the two-dimensional free electron gas of the Cu(111) surface state can be trapped within the pores of an organic nanoporous network, which can be regarded as a regular array of quantum dots. Moreover, a shallow dispersive electronic band structure is formed, which is indicative of electronic coupling between neighboring pore states.