Ashino Makoto, Schwarz Alexander, Behnke Timo, Wiesendanger Roland
Institute of Applied Physics, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany.
Phys Rev Lett. 2004 Sep 24;93(13):136101. doi: 10.1103/PhysRevLett.93.136101. Epub 2004 Sep 20.
We report atomic-resolution imaging and site-specific quantitative force measurements on a single-walled carbon nanotube by dynamic force microscopy and three-dimensional force field spectroscopy at low temperatures. The topography imaged in the attractive force regime reflects the trigonal arrangement of the hollow sites as maxima. Individual force curves were unambiguously assigned to carbon atoms and hollow sites, respectively. Site-specific quantitative evaluation revealed that the short-range interatomic van der Waals forces are responsible for the atomic-scale contrast.
我们通过低温下的动态力显微镜和三维力场光谱技术，报告了对单壁碳纳米管的原子分辨率成像和特定位置的定量力测量。在吸引力区域成像的形貌反映了中空位点的三角排列，呈现为最大值。单个力曲线分别明确地对应于碳原子和中空位点。特定位置的定量评估表明，短程原子间范德华力是原子尺度对比度的原因。
