  Reported values (0.2 MPa ~ 7.0 GPa) of the interlayer shear strength (ISS) of
graphite are very dispersed. The main challenge to obtain a reliable value of
ISS is the lack of precise experimental methods. Here we present a novel
experimental approach to measure the ISS, and obtain the value as 0.14 GPa. Our
result can serve as an important basis for understanding mechanical behavior of
graphite or graphene-based materials.
