Reduced graphene oxide decorated with Ni-Fe-Mo permalloy obtained by sputtering

Made available in DSpace on 2021-06-25T10:22:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-03-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) This work illustrates an effective method for obtaining hybrid nanoparticles of Ni-Fe-Mo permalloy and reduced graphene oxide (rGO). The metallic nanoparticles were spread by the sputtering technique, which allowed a good dispersion of the metallic nanoparticles onto rGO substrate powder. TEM showed permalloy nanoparticles smaller than 8 nm uniformly distributed throughout rGO. Permalloy/rGO hybrid with 10.5 wt% loading of permalloy nanoparticles was calculated by TGA. RBS experiment reveals that permalloy target and the nanoparticles deposited have similar composition. The interaction between permalloy and rGO was studied by FT-IR. Ni-Fe-Mo/rGO presented an electrical conductivity of 122 Scm−1, significantly higher than the original rGO and a magnetization hysteresis-loop coercivity of 16 Oe at room temperature. To our knowledge this is the first work in which permalloy nanoparticles are deposited onto graphene powder substrate by a physical impregnation technique. Escola Politécnica Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga, 6681 Universidade Estadual Paulista UNESP Faculdade de Engenharia, Campus de ilha solteira, Av. Brasil 56 Instituto de Física Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500 Instituto de Química Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500 Universidade Estadual Paulista UNESP Faculdade de Engenharia, Campus de ilha solteira, Av. Brasil 56 CAPES: 001