Direct evidences of pentagonal silicon chains and magic clusters
Abstract
Pentagon is one of the most beautiful geometric structures in nature, but it is rarely seen simply because five-fold symmetry is mathematically forbidden in a 2D or 3D periodic lattices. Fortunately, pentagon as a structural element is allowed in 1D or 0D systems, since translational symmetry is not necessary there. However, in these systems pentagons only compose a small portion of the structure. So far, 1D or 0D systems consisting of purely pentagons are still rare. Here, combing high resolution non-contact atomic force microscopy and tip-enhanced Raman spectroscopy, we have directly visualized the pentagon-ring structure in self-assembled Si nanoribbons and magic clusters on Ag(110) substrate. Moreover, chemical fingerprint of Si pentagon was detected in individual Si nanoribbon and clusters by tip-enhanced Raman spectroscopy. This work demonstrates that Si pentagon can be an important element in building silicon nanostructures, which may find potential applications in future nanoelectronics based on silicon.
Cite
@article{arxiv.1711.09322,
title = {Direct evidences of pentagonal silicon chains and magic clusters},
author = {Shaoxiang Sheng and Runze Ma and Jiangbin Wu and Wenbin Li and Longjuan Kong and Xin Cong and Duanyun Cao and Wenqi Hu and Jun-Wei Luo and Peng Cheng and Ping-Heng Tan and Ying Jiang and Lan Chen and Kehui Wu},
journal= {arXiv preprint arXiv:1711.09322},
year = {2017}
}
Comments
4 figures