Using the molecular dynamics (MD) simulations with ReaxFF potential, two different types of PFPE lubricants (Ztetraol and ZTMD) are prepared on a-C film, SiO2 particles adsorbed onto at room temperature. From simulation results, it is observed that increase stiffness leading to less airshear displacement. Since Ztetraol has higher mobility lower viscosity than ZTMD, penetrate deeper into lubric...