• 文献标题:   CVD graphene sheets electrochemically decorated with "core-shell" Co/CoO nanoparticles
  • 文献类型:   Article
  • 作  者:   BAYEV VG, FEDOTOVA JA, KASIUK JV, VOROBYOVA SA, SOHOR AA, KOMISSAROV IV, KOVALCHUK NG, PRISCHEPA SL, KARGIN NI, ANDRULEVICIUS M, PRZEWOZNIK J, KAPUSTA C, IVASHKEVICH OA, TYUTYUNNIKOV SI, KOLOBYLINA NN, GURYEVA PV
  • 作者关键词:   twisted graphene, coreshell magnetic nanoparticle, xray photoemission spectroscopy, raman spectroscopy
  • 出版物名称:   APPLIED SURFACE SCIENCE
  • ISSN:   0169-4332 EI 1873-5584
  • 通讯作者地址:   Belarusian State Univ
  • 被引频次:   5
  • DOI:   10.1016/j.apsusc.2018.01.245
  • 出版年:   2018

▎ 摘  要

The paper reports on the first successful fabrication of Co-graphene composites by electrochemical deposition of Co nanoparticles (NPs) on the sheets of twisted graphene. Characterization of the surface morphology and element mapping of twisted graphene decorated with Co NPs by transmission and scanning electron microscopy in combination with the energy-dispersive X-ray spectroscopy reveals the formation of isolated quasi-spherical oxidized Co NPs with the mean diameter < d > approximate to 220 nm and core-shell structure. X-ray photoelectron spectroscopy indicates that the core of deposited NPs consists of metal Co while the shell is CoO. Composite Co-graphene samples containing core-shell NPs reveal an exchange bias field up to 160 Oe at 4 K as detected by vibrating sample magnetometry after the field cooling procedure. (C) 2018 Elsevier B.V. All rights reserved.