Adsorption of Ag, Au, Cu, and Ni on MoS: theory and experiment.

Here, we present results of a computational and experimental study of adsorption of various metals on MoS. In particular, we analyzed the binding mechanism of four metallic elements (Ag, Au, Cu, Ni) on MoS. Among these elements, Ni exhibits the strongest binding and lowest mobility on the surface of MoS.

First principles study of nearly strain-free Ni/WSeand Ni/MoSinterfaces.

Metal/transition metal dichalcogenide interfaces are the subject of active research, in part because they provide various possibilities for interplay of electronic and magnetic properties with potential device applications. Here, we present results of our first principles calculations of nearly strain-free Ni/WSeand Ni/MoSinterfaces in thin-film geometry. It is shown that while both the WSeand MoSlayers adjacent to Ni undergo metallic transition, the layers farther from the interface remain semiconducting.

Preparation of Ultrathin Gold Films with Subatomic Surface Roughness.

Nanoscale device fabrication requires control over film growth at the atomic scale. Growth conditions must be tuned in consideration of interface parameters like chemical bonding, surface free energy, and lattice matching. In metals, electronic properties may also be utilized for control of physical parameters.

Room Temperature Formation of Carbon Onions via Ultrasonic Agitation of MoS₂ in Isopropanol.

Ultrasonic agitation is a proven method for breaking down layered materials such as MoS2 into single or few layer nanoparticles. In this experiment, MoS2 powder is sonicated in isopropanol for an extended period of time in an attempt to create particles of the smallest possible size. As expected, the process yielded a significant quantity of nanoscale MoS2 in the form of finite layer sheets with lateral dimensions as small as a few tens of nanometers.

Electronic structure of multi-walled carbon fullerenes.

Despite an enormous amount of research on carbon based nanostructures, relatively little is known about the electronic structure of multi-walled carbon fullerenes, also known as carbon onions. In part, this is due to the very high computational expense involved in estimating electronic structure of large molecules. At the same time, experimentally, the exact crystal structure of the carbon onion is usually unknown, and therefore one relies on qualitative arguments only.