Creation and Evaluation of Complex Nanostructures Comprising Multi-Atom Species at Room Temperature by Atom-by-Atom Imaging, Chemical Identification and Manipulation

2014 Fiscal Year Final Research Report

• Project/Area Number: 22221006
• Research Category: Grant-in-Aid for Scientific Research (S)
• Allocation Type: Single-year Grants
• Research Field: Nanostructural science
• Research Institution: Osaka University
• Principal Investigator: MORITA SEIZO 大阪大学, 産業科学研究所, 特任教授 (50091757)
• Co-Investigator(Kenkyū-buntansha): ABE Masayuki 大阪大学, 大学院基礎工学研究科, 教授 (00362666)
• Co-Investigator(Renkei-kenkyūsha): SUGIMOTO Yoshiaki 大阪大学, 大学院工学研究科, 准教授 (00432518) ; CUSTANCE Oscar 国立研究開発法人物質・材料研究機構, 先端的共通技術部門, グループリーダー (00444555)
• Research Collaborator: RUBEN Perez Universidad Autónoma de Madrid, Condensed Matter Physics, 教授 ; PAVEL Jelinek Academy of Sciences of the Czech Republic, Condensed Matter Physics, グループリーダー
• Project Period (FY): 2010-04-01 – 2015-03-31
• Keywords: 走査プローブ顕微鏡 / 原子間力顕微鏡 / 原子操作・組立 / 原子クラスタ / 二次元ナノ構造体 / 二次元ナノ空間 / 原子開閉 / 原子クラスタ・スイッチ

Outline of Final Research Achievements

We established a drift-free high-precision control and measurement technique of the combined atomic force microscope (AFM) / scanning tunneling microscope (STM) at room temperature (RT) comparable to an extremely low temperature. Then we developed 3 dimensional AFM/STM mapping techniques and clarified the exponential tip-sample distance dependence of tunneling current and chemical force at RT. Next we established the atom-gating technique of the nanospace barrier to create atom clusters consisted of a precisely controlled number of atoms from the thermal diffusion atoms confined in nanospace at RT. Besides we clarified the adsorption structure of created Pb trimer, and found tunneling current-induced concerted switching phenomenon of Pb2Si3 binary cluster. At last we also clarified the adsorption structure of Si tetramer, and observed sub-atomic STM image formed by high-frequency switching. These were elucidated in experiments and first-principles calculations.

Free Research Field

複合新領域