Abstract
Nanoindentation and elastic behavior of two-dimensional (2D) layered bismuth telluride (Bi2Te3) were investigated using a finite element analysis (FEA) approach. A circular suspended Bi2Te3 2D nanosheet is subjected to a vertical point force load at the nanosheet center, in which the resultant vertical deflection (i.e., indentation depth) is shown to be elastic and exhibits a linear to cubic transition with increasing point force. Using the shell models in the ABAQUS package, the elastic deformation transition could be clearly captured and it was shown to be strongly dependent on nanosheet's thickness as well as the pre-stretch magnitude in 2D nanosheets. Using a general shell element S4, the pre-stretch effect and Young's modulus were individually tuned in order to assess the elastic behavior experimentally observed by atomic force microscope (AFM). Complementary to AFM-based nanoindentations, this FEA work would help to validate the experimental acquisition of Young's moduli, and could also delineate the detailed strain/stress fields underneath the indenter.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
