Real Time TEM Imaging of Compression and Shear of Single Fullerene-Like MoS2 Nanoparticle
The deformation and degradation behavior of single inorganic fullerenes nanoparticles of MoS2 under compression and shear has been observed in real time using a high-resolution transmission electron microscope equipped with a nanoindentation holder. The MoS2 nanoparticles were compressed using a nanoindenter and a truncated diamond tip. For the first time, real time imaging of the deformation of individual nanoparticles clearly shows first orientation changes in the particle shape during loading process followed by a large deformation and the exfoliation of the outer sheets of the fullerene nested structure. Exfoliation was observed for a contact pressure estimated at 1 GPa. Additional sliding tests performed with the nanoindenter gave evidence for a rolling process for lower contact pressures up to 100 MPa.
KeywordsIF-MoS2 nanoparticles In situ HRTEM Nanoindentation FM/AW additives Boundary lubrication
This work was supported by EU 7th framework programme ADDNANO (NMP4-LA-2009-229284). Thanks are also due to the CLYM—http://clym.insa-lyon.fr—for the access to the 2010F microscope; the financial support of the Rhône-Alpes region—http://en.rhonealpes.fr/—is also gratefully acknowledged. The authors like to thank Pr. R. Tenne from the Weizmann Institute for supplying the authors with nanoparticles.