Asymmetric pentagonal cluster on an Al-Cu-Co quasicrystal surface

作者：Zenkyu R; Matsui T; Tsai A P; Yuhara J^*

来源：Philosophical Magazine, 2011, 91(19-21): 2854-2861.

DOI：10.1080/14786435.2010.529092

• Al-Cu-Co
• quasicrystals
• structure analysis
• surface analysis
• cluster-assembled materials
• scanning probe microscopy

The 10-fold surface of a decagonal Al66Cu17Co17 quasicrystal has been studied by scanning tunneling microscopy (STM). Three kinds of characteristic pentagonal clusters are observed in the STM images. Clusters within a given terrace have the same orientation, while those in adjacent terraces have opposite orientations. We show that two of the pentagonal cluster types are part of the 2-nm cluster, which is considered to be the basic structural unit of the Al-Cu-Co quasicrystal. The local atomic arrangement in the 2-nm clusters is found to be asymmetric.

• 出版日期2011