Bowl Inversion and Electronic Switching of Buckybowls on Gold
Bowl Inversion and Electronic Switching of Buckybowls on Gold
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DOI：
10.1021/jacs.6b04741
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发表时间：
2016-09-21
影响因子：
15
通讯作者：
Kiguchi, Manabu
中科院分区：
文献类型：
--
作者：
Fujii, Shintaro;Ziatdinov, Maxim;Kiguchi, Manabu
碗形π共轭化合物，或巴基碗，是一类新型的sp(2)杂化纳米碳材料。与管状碳纳米管和球形富勒烯相比，巴基碗具有结构灵活性。碗对碗结构反转是解决方案中巴基碗的独特特性之一。表面上的碗反转通过表面上的碗向上和碗向下状态之间的双稳态切换来改变金属分子相互作用，这使得表面吸附的巴基碗成为阐明纳米碳材料的机电特性的相关模型系统。在这里，我们报告了扫描隧道显微镜（STM）测量和从头开始原子模拟的结合，以识别 Au(111) 酸上的苏马烯巴基碗的吸附层结构，揭示其独特的碗反转行为。我们证明，通过使 STM 尖端接近分子可以引发碗反转。通过使用 STM 尖端调整局部金属-分子相互作用，sumanene blickybowl 表现出结构双稳态，其转换速率比随机反转过程快两个数量级。
Bowl-shaped pi-conjugated compounds, or buckybowls, are a novel class of sp(2)-hybridized nanocarbon materials. In contrast to tubular carbon nanotubes and ball-shaped fullerenes, the buckybowls feature structural flexibility. Bowl-to-bowl structural inversion is one of the unique properties of the buckybowls in solutions. Bowl inversion on a surface modifies the metal molecule interactions through bistable switching between bowl-up and bowl-down states on the surface, which makes surface-adsorbed buckybowls a relevant model system for elucidation of the mechanoelectronic properties of nanocarbon materials. Here, we report a combination of scanning tunneling microscopy (STM) measurements and ab initio atomistic simulations to identify the adlayer structure of the sumanene buckybowl on Au(111) acid reveal its unique bowl inversion behavior. We demonstrate that the bowl inversion can be induced by approaching the STM tip toward the molecule. By tuning the local metal-molecule interaction using the STM tip, the sumanene blickybowl exhibits structural bistability with a switching rate that is two orders of magnitude faster than that of the stochastic inversion process.