Computational Investigation of Point Defect Formation and Migration in Nuclear Fuels

08 Mar 2012 | Online Presentations | Contributor(s): Susan Sinnott

The stabilities of selected fission products are investigated as a function of stoichiometry in uranium oxide. The approach is density functional theory (DFT) that is used to calculate the incorporation and solution energies of solid and gaseous fission products at the anion and cation vacancy …

Atomistic Modeling of the Mechanical Properties of Nanostructured Materials

16 Apr 2007 | Online Presentations | Contributor(s): SeongJun Heo, Susan Sinnott

The mechanical properties of carbon nanotubes are studied by using classical molecular dynamics simulations. Especially, the effects of filling, temperature, and functionalization on CNT's tensional and twisting properties are considered in this study.

Fouling Mechanisms in Y-shaped Carbon Nanotubes

04 Apr 2007 | Online Presentations | Contributor(s): Jason Myers, SeongJun Heo, Susan Sinnott

In the modern pharmaceutical and chemical industries, solutions of extremely high purity are needed. Current filtration methods are reaching the limits of their abilities, so new filters must be developed. One possible filter is a Y-shaped carbon nanotube (Y-tube). By changing the sizes of the …

Molecular Dynamics Simulations with the Second-Generation Reactive Empirical Bond Order (REBO) Potential

02 Apr 2006 | Online Presentations | Contributor(s): Wen-Dung Hsu, Susan Sinnott

In this presentation, the molecular dynamics (MD) simulation will be introduced first. The applications of MD simulation, the procedure of MD simulation and some speed-up methods in MD simulation will be talked. Then the bond order potentials which are capable to predict bond breaking and new bond …

Molecular Dynamics Studies of Gaseous Transport

05 Apr 2006 | Online Presentations | Contributor(s): Ki-Ho Lee, Jason Myers, Susan Sinnott

Carbon nanotubes (CNTs) have generated a great deal of interest due to their unique properties. In this study, we examine the transport properties of various nanotubes using REBO-MD to determine the effects of diameter and chirality on transport mode. Both oxygen and methane were diffused through …

Tutorial on Using Micelle-MD

05 Apr 2006 | Online Presentations | Contributor(s): Patrick Chiu, Kunal Shah, Susan Sinnott

This is a tutorial using Micelle-MD. This includes the main capabilities, computation procedure, with format of files generated, and the simulation setup, which includes the material models implemented.

Mechanical Properties of Surfactant Aggregates at Water-Solid Interfaces

05 Apr 2006 | Online Presentations | Contributor(s): Patrick Chiu, Kunal Shah, Susan Sinnott

This is a talk on the mechanical properties of surfactant aggregates at water-solid interfaces using Micelle-MD. This includes silica indentations of micelles with comparison to experimental data and graphite indentation of Micelle.

Tribological Properties of Carbon Nanotube Bundles

03 Apr 2006 | Online Presentations | Contributor(s): SeongJun Heo, Susan Sinnott

The tribological properties of carbon nanotube(CNT) bundles are investigated in this research using classical molecular dynamics(MD) simulations. Bundle of hollow single walled CNT or CNT filled with C60 is placed between two hydrogen-terminated amorphous diamond-like carbon(DLC) substrates. The …

The Effect of Temperature Control on the Mechanical Behavior of Carbon Nanotubes

29 Mar 2006 | Online Presentations | Contributor(s): SeongJun Heo, Susan Sinnott

The effect of thermostat configurations on the mechanical behavior of empty and butane (n-C4H10) filled (10,10) carbon nanotubes (CNTs) is examined using classical, atomistic, molecular dynamics (MD) simulations. In particular, the influence of different types of thermostats, relative numbers of …

Irradiation and Nanomechanics of Multi-Walled Carbon Nanotubes

23 Mar 2006 | Online Presentations | Contributor(s): Sharon K. Pregler, Susan Sinnott

Irradiation of nanotube structures with electron and ion beams has been used to produce functionalized nanotubes and fundamentally new structures, including junctions. Here, we build on previous studies to investigate the low-energy electron and ion (Ar and CF3) beam irradiation of triple walled …

Engineering the Fiber-Matrix Interface in Carbon Nanotube Composites

23 Mar 2006 | Online Presentations | Contributor(s): Sharon K. Pregler, Yanhong Hu, Susan Sinnott

Particle depositions on polymer and carbon substrates to induce surface chemical modification are a growing research topic in particle-surface interactions due to localized deposition energy and the high density of molecules impacting the surface. Previous simulations have shown that particle …

Bending Properties of Carbon Nanotubes

21 Mar 2006 | Online Presentations | Contributor(s): SeongJun Heo, Susan Sinnott

The effect of filling carbon nanotubes on the mechanical, especially bending, behavior of empty and filled (10,10) carbon nanotubes (CNTs) is examined using classical, atomistic, molecular dynamics (MD) simulations. In particular, influences of different filling materials like C60 or other CNT and …

Nanofluidics

15 Jun 2004 | Online Presentations | Contributor(s): Susan Sinnott

Nanofluidics