Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany.
J Am Chem Soc. 2011 Oct 26;133(42):16847-51. doi: 10.1021/ja204624g. Epub 2011 Oct 3.
Individual Xe atoms as well as single CO and CH(4) molecules adsorbed at the tip apex of a scanning tunneling microscope (STM) function as microscopic force sensors that change the tunneling current in response to the forces acting from the surface. An STM equipped with any of these sensors is able to image the short-range Pauli repulsion and thus resolve the inner structure of large organic adsorbate molecules. Differences in the performance of the three studied sensors suggest that the sensor functionality can be tailored by tuning the interaction between the sensor particle and the STM tip.
单个 Xe 原子以及吸附在扫描隧道显微镜 (STM) 针尖顶端的单个 CO 和 CH(4) 分子可用作微观力传感器，这些传感器通过响应来自表面的力来改变隧道电流。配备有这些传感器中的任何一种的 STM 都能够成像短程 Pauli 斥力，从而解析大型有机吸附分子的内部结构。所研究的三种传感器的性能差异表明，可以通过调整传感器颗粒与 STM 尖端之间的相互作用来调整传感器的功能。
