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Full-Text Articles in Physics
Ionic Alkalihalides As Pressure Media In Dac Experiments, Julius Monello
Ionic Alkalihalides As Pressure Media In Dac Experiments, Julius Monello
Undergraduate Research Opportunities Program (UROP)
In Diamond Anvil Cells (DACs), usually a pressure transmitting medium functions to transform the uniaxial pressure supplied by the opposing diamond anvils into uniform hydrostatic pressure acting on the sample. Conventionally, a 4-1 methanol-ethanol solution, or a 16-3-1 methanol-ethanol-water solution is used as pressure transmitting medium. However, these two solutions transform into a glass with high elastic shear strength at pressures around 12-14 GPa and no longer function as hydrostatic medium. Our goal was to determine if liquid ionic alkalihalide alkanolate complexes will provide more uniform pressure in the cell up to 20 GPa. Ruby (Cr-doped AlP,) produces two Cr"+ …
Aspect Ratio Dependent Buckling Mode Transition In Single-Walled Carbon Nanotubes Under Compression, Jeremy Feliciano
Aspect Ratio Dependent Buckling Mode Transition In Single-Walled Carbon Nanotubes Under Compression, Jeremy Feliciano
Festival of Communities: UG Symposium (Posters)
Using molecular dynamics simulations, we study axial compressive behavior of single-walled carbon nanotubes (SWCNTs) with a wide range of aspect ratios (length to diameter ratio). It is shown that the difference in aspect ratio leads to distinct buckling modes in SWCNTs. Small-aspect-ratio SWCNTs primarily exhibit shell buckling; they switch to column buckling mode with increasing aspect ratio. Further compression of the already column buckled large-aspect-ratio SWCNTs results in a shell buckling. This shell buckling mode is distinct from that of small-aspect-ratio SWCNTs in that it originates from the column buckling induced bending deformation.
Computational Study Of Carbon Nanotubes Under Strain, Jeremy Feliciano, William Wolfs
Computational Study Of Carbon Nanotubes Under Strain, Jeremy Feliciano, William Wolfs
Festival of Communities: UG Symposium (Posters)
We perform computational studies of carbon nanotubes (CNTs) using molecular dynamics simulations to examine the behavior of single-walled (SW) and multiwalled (MW) CNTs under large compressive and bending strains. We study the effects of defects, heating and chirality on their properties. Research on CNTs holds great promise for developing new advanced materials in applications ranging from high-strength composites to next-generation electronics.