Development of graphene-based systems with special magnetic properties

开发具有特殊磁性能的石墨烯基系统

• 批准号: 500791-2016
• 负责人: Zhang, Jin
• 金额: $ 3.64万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618452
• 关键词: Development; graphene; based; systems; special

The goal of this proposed project is to develop a giant magnetoresistance (GMR) sensor by using graphene-based nanocompoistes to detect low magnetic field. GMR effect refers the significant change of electrical resistance of materials under a magnetic field. GMR sensor is normally made of magnetic/non-magnetic/magnetic multilayer, and have been used in industry for measurement and control purpose. The magnetic sensors with small dimensions and low power consumption are highly demanded. We herein propose a graphene-based nanocomposite system with GMR effect to detect low magnetic field (<10KOe). Saint Jean Carbon Inc. (SJC) is a Canadian mining company with efforts on developing graphene products. Working with SJC, we will focus on three main aspects to achieve the research goal: (1) development of physical and chemical processes for loading magnetic nanoparticles on graphene sheets; (2) design and characterization of the microstructures and magnetic properties of engineered graphene to have GMR effect; (3) development of a proof of concept on graphene-based GMR sensor for detecting low magnetic field (<10KOe). It is expected that this proposed NSERC CRD project will have a significant impact to convert Canadian graphite mining industry into high-tech industry through applying advanced nanotechnology. Trainees involved in this project will be able to gain solid experience in development of graphene-based systems with special magnetic properties.

本计画的目的是利用石墨烯奈米复合材料来发展一种巨磁阻感测器，以侦测低磁场。巨磁电阻效应是指在磁场作用下材料的电阻发生显著变化。巨磁阻传感器通常由磁性/非磁性/磁性多层膜组成，并已在工业上用于测量和控制目的。因此，对磁传感器的小尺寸、低功耗的要求越来越高。本文提出了一种具有GMR效应的石墨烯基纳米复合材料系统，用于检测低磁场（<10 KOe）。圣让碳素公司(SJC)是一家加拿大矿业公司，致力于开发石墨烯产品。与SJC合作，我们将专注于三个主要方面以实现研究目标：（1）开发在石墨烯片上负载磁性纳米颗粒的物理和化学过程;（2）设计和表征具有GMR效应的工程石墨烯的微观结构和磁性;（3）开发用于检测低磁场（<10 KOe）的石墨烯基GMR传感器的概念验证。预计NSERC CRD项目将通过应用先进的纳米技术，对加拿大石墨采矿业向高科技产业转变产生重大影响。参与该项目的学员将能够获得开发具有特殊磁性的石墨烯系统的丰富经验。