Investigation on the pass of tunneling electrons through alkanethiol self-assembled monolayers

• Project/Area Number: 25790055
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: Kanazawa University
• Principal Investigator: OKABAYASHI Norio 金沢大学, 数物科学系, 助教 (90387853)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: 非弾性電子トンネル分光 / 走査トンネル顕微鏡 / 原子間力顕微鏡 / 走査型トンネル顕微鏡 / 非接触原子間力顕微鏡 / 国際研究者交流 / ドイツ

Outline of Final Research Achievements

Towards the investigation on the pass of tunneling electrons through the self-assembled monolayer by using inelastic electron tunneling spectroscopy (IETS), the role of a tip apex is investigated by combing scanning tunneling microscopy and atomic force microscopy. It was found that the tip whose apex consists of a single atom provides the four times larger IETS signal over the tip whose tip apex consists of three atoms. This finding was interpreted in terms of (1) the current ratio of a process through the molecule to that of the total current and (2) efficiency of the inelastic process for the process involving the molecule.

Research Products

• [Journal Article] Force field analysis suggests a lowering of diffusion barriers in atomic manipulation due to presence of STM tip (2015)
  • Author(s): Matthias Emmrich, Maximilian Schneiderbauer, Ferdinand Huber, Alfred J. Weymouth, Norio Okabayashi, and Franz J. Giessibl
  • Journal Title: Physical Review Letters Volume: 114 Issue: 14 Pages: 146101-4
  • DOI: 10.1103/physrevlett.114.146101
  • Peer Reviewed
• [Presentation] Role of the microscopic tip apex in STM-IETS measurements (2015)
  • Author(s): Norio Okabayashi, Alexander Gustafsson, Angelo Peronio, Magnus Paulsson, Toyoko Arai, and Franz J. Giessibl
  • Organizer: Spring meeting of German Physical Society
  • Place of Presentation: Berlin, Germany
  • Year and Date: 2015-03-19
• [Remarks] 金沢大学研究者情報
  • URL: http://ridb.kanazawa-u.ac.jp/public/detail.php?id=4104&page=2&org2_cd=340200