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Characterizing and Manipulating Individual Molecules by Scanning Tunneling Microscopy
Bin Li,J. G. Hou
Author NameAffiliationE-mail
Bin Li Hefei National Lab. For Physical Sciences at Microscale, University of Science and Technology of China libin@mail.ustc.edu.cn 
J. G. Hou Hefei National Lab. For Physical Sciences at Microscale, University of Science and Technology of China jghou@ustc.edu.cn 
Abstract:
Scanning tunneling microscopy (STM) can provide us the special means to characterize the locally physical and chemical properties of individual molecules, and even help us to manipulate the individual molecules for constructing new molecule-scale devices. Here we have adopted two new types of STM techniques to characterize the encapsulated metal atom inside a fullerene cage, and to construct a molecule-device with strong Kondo effect, respectively. The spatially dI/dV mapping spectra were used to unveil the energy-resolved metal-cage hybrid states of individual Dy@C82 molecule, and the important information about the spatial position of Dy atom inside the cage and the Dy-cage interaction was revealed. The high-voltage pulse by STM tip is controlled to induce the dehydrogenation of Co phthalocyanine molecule and change its adsorption configuration on Au(111) surface, so as to recover Kondo effect that disappears in the case of intact adsorbed molecule.
Key words:  Individual molecule, Scanning tunneling microscopy, Hybrid state, Kondo effect
FundProject:国家自然科学基金
利用扫描隧道显微镜表征和操纵单分子
李斌,侯建国
摘要:
扫描隧道显微镜(STM)提供给我们一种表征单分子的局域物理和化学特性的特殊方法,甚至还能帮助我们操纵单分子以构造分子尺度的新型器件。本文中我们采用了两种新型STM技术分别来表征封装在富勒烯笼里面的金属原子和构造一种具有较强Kondo效应的分子器件。空间dI/dV映像谱被用来探索单个Dy@C82分子中能量分辨的金属-笼杂化态,揭示了有关Dy原子在碳笼中的空间位置和Dy-碳笼之间相互作用的重要信息。我们也通过控制STM针尖诱导的高电压脉冲来诱导CoPc分子的边缘脱氢化,从而改变了这个分子在Au(111)表面的吸附构型,导致吸附在Au表面的完整CoPc分子所不具备的Kondo效应产生。
关键词:  单分子,扫描隧道显微镜,杂化态,Kondo效应
DOI:10.1088/1674-0068/20/04/468-474
分类号: