10:45 〜 11:00
▼ [13a-N301-4] New One-Dimensional Structure of Si Allotrope on Ag(111)
キーワード：Atomic force microscopy, Scanning probe microscopy, Silicon nanoribbons
In recent years, the progress of high-functionality and miniaturizing of electronic devices stimulates a growing interest in one-dimensional materials. SiNRs have the potential to apply to future electronics devices because its compatibility with current silicon-based electronics and the theoretical outstanding electronic properties such as size-dependent band gap. Therefore, Silicon nanoribbons (SiNRs) have attracted much attention.
Here, we report the atomic structure of SiNRs on Ag(111). We found SiNRs on Ag(111) by depositing Si on the Ag(111) substrate. We investigated SiNRs on Ag(111) with a combination of scanning tunneling microscopy (STM), atomic force microscopy (AFM), and density functional theory (DFT) calculations. We obtained the atomic resolution STM images and AFM images of SiNRs on Ag(111). They reveal that SiNRs have the same width and align along the equivalent orientations of Ag(111). The main body of SiNRs was found symmetric about the long axes of ribbons, but the terminals of SiNRs break the symmetry. The observations indicate that SiNRs are stable under room temperature. In order to determine the detailed atomic structure of SiNRs, we performed the DFT calculations. The calculation results reveal the buckled single-layer structure of SiNRs, which agrees well with the STM and AFM observation results. In our proposed atomic structure, SiNRs have the unique structure that are composed of Si hexagonal and tetragonal rings.
Here, we report the atomic structure of SiNRs on Ag(111). We found SiNRs on Ag(111) by depositing Si on the Ag(111) substrate. We investigated SiNRs on Ag(111) with a combination of scanning tunneling microscopy (STM), atomic force microscopy (AFM), and density functional theory (DFT) calculations. We obtained the atomic resolution STM images and AFM images of SiNRs on Ag(111). They reveal that SiNRs have the same width and align along the equivalent orientations of Ag(111). The main body of SiNRs was found symmetric about the long axes of ribbons, but the terminals of SiNRs break the symmetry. The observations indicate that SiNRs are stable under room temperature. In order to determine the detailed atomic structure of SiNRs, we performed the DFT calculations. The calculation results reveal the buckled single-layer structure of SiNRs, which agrees well with the STM and AFM observation results. In our proposed atomic structure, SiNRs have the unique structure that are composed of Si hexagonal and tetragonal rings.