Sliding parts in nanosystems such as nanoelectromechanical systems and nanomotors increasingly involve large speeds, and rotations as well as translations of the moving surfaces; yet, the physics of high-speed nanoscale friction is so far unexplored. Here, by simulating the motion of drifting and of kicked Au clusters on graphite--a workhorse system of experimental relevance--we demonstrate and...

We have investigated the circumstances underlying recent reports of very large values of ballistic magnetoresistance (BMR) in nanocontacts between magnetic wires. We find that the geometries used are subject to artifacts due to motion of the wires that distort the nanocontact thereby changing its electrical resistance. Since these nanocontacts are often of atomic scale, reliable experiments wou...

In this research, quasi-static penetration and ballistic properties of non-woven kenaf fibres/Kevlar epoxy hybrid laminates with thicknesses ranging from 3.1 mm to 10.8 mm by hard projectile at normal incidence have been experimentally investigated. Hybrid composites were fabricated by hand lay-up technique in a mould and cured at room temperature for 24 h by static load. Hybrid composites cons...

Carbon nanotube field-effect transistors (CNTFETs) have been studied in recent years as a potential alternative to CMOS devices, because of the capability of ballistic transport. In order to account for the ballistic transport we solved the coupled Poisson and Schrödinger equations for the analysis these devices. Conventionally the coupled Schrödinger-Poisson equation is solved iteratively, by ...

GaN ballistic or quasi-ballistic electron devices require short transit distances in the order of a mean free path to avoid longitudinal optical phonon LO emission. Vertical current flow by design takes full advantage of the abrupt and thin layers grown by molecular beam epitaxy (MBE). Moreover, crystal orientation becomes important when ballistic transport is involved since bandstructure depen...

In this thesis, we study continuous diffusions in random environment on Rd . The randomness in the environment is incorporated in the diffusion matrix and the drift term that are stationary random variables. Once the environment is chosen, it remains fixed in time, and the diffusion evolving in this frozen environment is a Markov process. To restore some stationarity, it is common to average bo...