Au Nanoparticles Chemisorbed by Dithiol Molecules Inserted in Alkanethiol Self-Assembled Monolayers Characterized by Scanning Tunneling Microscopy

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概要

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• Alkanethiol-protected Au nanoparticles have been chemically immobilized on Au(111) substrates by alkanedithiol and alkanethiol mixed self-assembled monolayers (SAMs). Octanethiol SAMs on Au(111) have been used as host matrices for molecular insertion by 1,8-octanedithiol (C8S2) and 1,10-decanedithiol (C10S2). The dithiol molecules in the mixed SAMs and the Au nanoparticles on the mixed SAMs were observed by scanning probe microscopy. The densities of C8S2 and C10S2 mixed SAMs were controlled by varying the dithiol concentration from 0.5 to 50 mM. The densities of Au nanoparticles were almost equal to those of the dithiol molecules, indicating that the Au nanoparticle chemisorbed through the protruding sulfur of the dithiol molecules displaced the protecting group of the Au core. The chemisorbed Au nanoparticles were stable for scanning tunneling spectroscopy (STS) measurements. The resistance of the chemisorbed nanoparticles between the Au core and the Au(111) substrate is discussed.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2009-04-25

著者

• Majima Yutaka

  Department Of Electrical And Electronic Engineering Tokyo Institute Of Technology

• Li Xinheng

  Department Of Electronic Chemistry Interdisciplinary Graduate School Of Science And Engineering Toky

• KANEHARA Masayuki

  Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba

• Yasutake Yuhsuke

  Department Of Physical Electronics Tokyo Institute Of Technology

• Teranishi Toshiharu

  Graduate School Of Pure And Applied Chemistry University Of Tsukuba

• Kono Keijiro

  Department of Physical Electronics, Tokyo Institute of Technology, Tokyo 152-8552, Japan

• Kanehara Masayuki

  Department of Physical Electronics, Tokyo Institute of Technology, Tokyo 152-8552, Japan

• Teranishi Toshiharu

  Graduate School of Pure and Applied Science, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan

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