One-step,in situ growth of unmodified graphene – magnetic nanostructured composites |
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| Affiliation: | 1. Institute of Advanced Materials, Physicochemical Processes, Nanotechnology, and Microsystems (IAMPPNM), Demokritos National Research Center, Athens 153 10, Greece;2. Department of Chemical Engineering, The Petroleum Institute, P.O. Box 2533, Abu Dhabi, United Arab Emirates;1. Department of Chemistry, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China;2. Key Laboratory for Large-Format Battery Materials and System (Ministry of Education), School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China;1. Centre for Ionics University Malaya, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia;1. Departamento de Óptica, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Avda. Complutense s/n, 28040 Madrid, Spain;2. Departamento de Física e Astronomia e IFIMUP-IN, Faculdade de Ciências, Universidade do Porto, R. do Campo Alegre 687, 4169-007 Porto, Portugal |
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| Abstract: | Development of composite materials that combine the superior electronic properties of graphene with magnetic functionality is highly desirable as can open new doors for graphene applications. However, attempts to grow such structures typically result in significantly reduced graphene quality due to processing required for the graphene formation and/or magnetic functionalization. We report a magnetic graphene material consisting of 2–5 graphene layers encapsulating magnetic nanoparticles, produced in one step without any chemical modification or post-treatment, using a dual-action ferrofluid catalyst/carbon chemical vapor deposition (CVD) precursor. The resulting composite exhibits high quality, as evidenced by Raman spectroscopy, since the properties of as grown pure graphene are fully preserved, coupled to magnetic sensitivity, as evidenced by Mossbauer and magnetic measurements, originated from the encapsulated Fe-based nanoparticles. Notably, the material is stable due to particle encapsulation by the graphene layers, while the fabrication is simple and carried out by CVD which is widely used in the microelectronics industry thus favoring scalability towards applications that include magnetoelectronics, high-density data storage, magnetic nanodevices, and electrochemical energy storage and supply. |
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