• 文献标题:   Exploring the Capability of HAADF-STEM Techniques to Characterize Graphene Distribution in Nanocomposites by Simulations
  • 文献类型:   Article
  • 作  者:   BALADES N, SALES DL, HERRERA M, RAYA AM, HERNANDEZGARRIDO JC, LOPEZHARO M, MOLINA SI
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF NANOMATERIALS
  • ISSN:   1687-4110 EI 1687-4129
  • 通讯作者地址:   Univ Cadiz
  • 被引频次:   0
  • DOI:   10.1155/2018/4906746
  • 出版年:   2018

▎ 摘  要

This paper explores the capability of scanning transmission electron microscopy (STEM) techniques in determining the dispersion degree of graphene layers within the carbon matrix by using simulated high-angle annular dark-field (HAADF) images. Results ensure that unmarked graphene layers are only detectable if their orientation is parallel to the microscope beam. Additionally, gold-marked graphene layers allow evaluating the dispersion degree in structural composites. Moreover, electron tomography has been demonstrated to provide truthfully 3D distribution of the graphene sheets inside the matrix when an appropriate reconstruction algorithm and 2D projections including channelling effect are used.