Fabrication of functional fiber using carbon nanotubes encapsulating ferromagnetic metal nanowires

2015 Fiscal Year Final Research Report

• Project/Area Number: 25390030
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nanomaterials engineering
• Research Institution: Mie University
• Principal Investigator: Sato Hideki 三重大学, 工学(系)研究科(研究院), 准教授 (40324545)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 強磁性金属内包カーボンナノチューブ / 鉄ナノワイヤ / カーボンナノチューブ繊維 / 化学気相成長法 / 鉄内包カーボンナノチューブシート

Outline of Final Research Achievements

Carbon nanotubes that encapsulate ferromagnetic iron nanowire (Fe@CNTs) exhibit remarkably high coercivity due to its high aspect ratio shape. Because of this characteristic, various applications of Fe@CNT have been expected. This study focused on the following two points that are required for the applications: (i) to find out growth conditions of Fe@CNTs that give further enhancement of those coercivity, (ii) to develop methods to fabricate sheets that comprise Fe@CNT fibers.
It was found that the coercivity of Fe@CNTs was enhanced to more than 2.0 kOe by using Ni film with oxidation treatment as a catalyst for the growth of Fe@CNTs. In addition, the free-standing Fe@CNT sheet, which was the Fe@CNT film that was not supported by the substrate, was successfully fabricated by embedding the Fe@CNT film on the substrate in resin and detaching the film from it. This Fe@CNT sheet exhibited the same magnetic property as that before the detaching.

Free Research Field

ナノ材料工学