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Comparison of Molecular Dynamics and Binary Collision Approximation Simulations for Atom Displacement Analysis
(Elsevier, 2013)
Molecular dynamics (MD) and binary collision approximation (BCA) computer simulations are employed to study surface damage by single ion impacts. The predictions of BCA and MD simulations of displacement cascades in amorphous ...
Electricity Storage for Intermittent Renewable Sources
(Royal Society of Chemistry, 2012)
With sufficient electricity storage capacity, any power production profile may be mapped onto any desired supply profile. We present a framework to determine the required storage power as a function of time for any power ...
Tunable Nanometer Electrode Gaps by MeV Ion Irradiation
(American Institute of Physics, 2012)
We report the use of MeV ion-irradiation-induced plastic deformation of amorphous materials to fabricate electrodes with nanometer-sized gaps. Plastic deformation of the amorphous metal \(\text{Pd}_{80}\text{Si}_{20}\) ...
Ion-sculpting of Nanopores in Amorphous Metals, Semiconductors and Insulators
(American Institute of Physics, 2010)
We report the closure of nanopores to single-digit nanometer dimensions by ion sculpting in a range of amorphous materials including insulators (SiO\(_2\) and SiN), semiconductors (a-Si), and metallic glasses (Pd\(_{80}\ ...
Thermal Activation and Saturation of Ion Beam Sculpting
(American Institute of Physics, 2011)
We report a material-dependent critical temperature for ion beam sculpting of nanopores in amorphous materials under keV ion irradiation. At temperatures below the critical temperature, irradiated pores open at a rate that ...
Nanopore Fabrication in Amorphous Si: Viscous Flow Model and Comparison to Experiment
(American Institute of Physics, 2010)
Nanopores fabricated in free-standing amorphous silicon thin films were observed to close under 3 keV argon ion irradiation. The closing rate, measured in situ, exhibited a memory effect: at the same instantaneous radius, ...
A metal-free organic–inorganic aqueous flow battery
(Nature Publishing Group, 2014)
As the fraction of electricity generation from intermittent renewable sources—such as solar or wind—grows, the ability to store large amounts of electrical energy is of increasing importance. Solid-electrode batteries ...
Synthesis and Variable Temperature Electrical Conductivity Studies of Highly Ordered TiO2 Nanotubes
(Springer Verlag, 2009)
Rafts of aligned, high aspect ratio TiO<sub>2</sub> nanotubes were fabricated by an electrochemical anodization method and their axial electrical conductivities were determined over the temperature range 225-400 °C. Length, ...
Strain-Stabilized Solid Phase Epitaxy of Si–Ge on Si.
(Ameican Institute of Physics, 2006)
We compare solid phase epitaxial growth of amorphous Si–Ge alloys created by Ge ion implantation into Si with and without the imposition of 0.5 GPa of externally applied biaxial tensile stress. External loading stabilizes ...
Linear Dynamics of Ion Sputtered Surfaces: Instability, Stability and Bifurcations
(Insitute of Physics Publishing, 2009)
The linear dynamics of ion sputtered solids is essential to understanding the evolution of ordered and disordered surface patterns. We review the existing models of linear dynamics and point out qualitative discrepancies ...