Browsing Advanced Materials for Micro- and Nano-Systems (AMMNS) by Title
Now showing items 1-20 of 122
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Amorphous Al-transition Metal Alloys as Anode Material for Lithium Ion Battery
(2006-01)Al based alloy powders (Al₈₅Ni₅Y₆Co₂Fe₂) are produced by spray atomization method. High energy ball milling is done to modify the surface topology and particle size for better electrochemical performance. X ray diffraction ... -
Amorphous Metallic Glass as New High Power and Energy Density Anodes For Lithium Ion Rechargeable Batteries
(2002-01)We have investigated the use of aluminum based amorphous metallic glass as the anode in lithium ion rechargeable batteries. Amorphous metallic glasses have no long-range ordered microstructure; the atoms are less closely ... -
Anisotropic Superelasticity of Textured Ti-Ni Sheet
(2002-01)A recently developed crystal-mechanics-based constitutive model for polycrystalline shape-memory alloys (Thamburaja and Anand [1]) is shown to quantitatively predict the in-plane anisotropy of superelastic sheet Ti-Ni to ... -
Atomistic Simulations of Metallic Cluster Coalescence
(2002-01)A new computational method is introduced to investigate the stresses developed in the island-coalescence stage of polycrystalline film formation during deposition. The method uses molecular dynamics to examine the behavior ... -
Ballistic Transport in Carbon Nanotubes from First-Principles Molecular Dynamics Simulations
(2004-01)We determined the Landauer ballistic conductance of pristine nanotubes at finite temperature via a novel scheme that combines ab-initio molecular dynamics, maximally-localized Wannier functions, and a tight-binding formulation ... -
Ballistic Transport in Nanostructures from First-Principles Simulations
(2003-01)We developed and implemented a first-principles based theory of the Landauer ballistic conductance, to determine the transport properties of nanostructures and molecular-electronics devices. Our approach starts from a ... -
Ballistic Transport in Nanostructures, and its Application to Functionalized Nanotubes
(2004-01)We developed and implemented a first-principles based theory of the Landauer ballistic conductance, to determine the transport properties of nanostructures and molecular-electronics devices. Our approach starts from a ... -
Bulk Glass Formation in Eutectic of La-Cu-Ni-Al Metallic Alloys
(2003-01)A eutectic in La-rich La-Cu₀.₅Ni₀.₅-Al alloys was determined by studying the melting behaviors and the microstructure observations. The microstructures of the La-Cu-Ni-Al alloys prepared by ... -
Carbon Nanotube Growth Using Ni Catalyst in Different Layouts
(2005-01)Vertically aligned carbon nanotubes have been grown using Ni as catalyst by plasma enhanced chemical vapor deposition system (PECVD) in various pre-patterned substrates. Ni was thermally evaporated on silicon substrates ... -
Characterization and Modeling of Stress Evolution During Nickel Silicides Formation
(2003-01)An curvature measurement technique was used to characterize the stress evolution during reaction of a Ni film and a silicon substrate to form nickel silicide. Stress changes were measured at each stage of the silicide ... -
Characterization of LiNi₀.₅Mn₁.₅O₄ Thin Film Cathode Prepared by Pulsed Laser Deposition
(2006-01)LiNi₀.₅Mn₁.₅O₄ thin films have been grown by pulsed laser deposition (PLD) on stainless steel (SS) substrates. The crystallinity and structure of thin films were investigated by X-ray diffraction (XRD). Microstructure and ... -
Characterization of ZnO Nanorods Grown on GaN Using Aqueous Solution Method
(2005-01)Uniformly distributed ZnO nanorods with diameter 70-100 nm and 1-2μm long have been successfully grown at low temperatures on GaN by using the inexpensive aqueous solution method. The formation of the ZnO nanorods and the ... -
Charge Storage Effect in a Trilayer Structure Comprising Germanium Nanocrystals
(2002-01)A metal-insulator-semiconductor (MIS) device with a trilayer insulator structure consisting of sputtered SiO₂ (~50nm)/evaporated pure germanium (Ge) layer (2.4nm)/rapid thermal oxide (~5nm) was fabricated on a p-type ... -
Charge storage in nanocrystal systems: Role of defects?
(2004-01)Wet thermal oxidations of polycrystalline Si₀.₅₄Ge₀.₄₆ films at 600°C for 30 and 50 min were carried out. A stable mixed oxide was obtained for films that were oxidized for 50 min. ... -
Charge Storage Mechanism and Size Control of Germanium Nanocrystals in a Tri-layer Insulator Structure of a MIS Memory Device
(2003-01)A method of synthesizing and controlling the size of germanium nanocrystals is developed. A tri-layer metal-insulator-semiconductor (MIS) memory device structure comprising of a thin (~5nm) silicon dioxide (SiO₂) ... -
Computation and Simulation of the Effect of Microstructures on Material Properties
(2002-01)Methods for and computed results of including the physics and spatial attributes of microstructures are presented for a number of materials applications in devices. The research in our group includes applications of ... -
Computation and Simulation of the Effect of Microstructures on Material Properties
(2003-01)Many material properties depend on specific details of microstructure and both optimal material performance and material reliability often correlate directly to microstructure. In nano- and micro-systems, the material's ... -
A Constitutive Model for the Mechanical Behavior of Single Crystal Silicon at Elevated Temperature
(2002-01)Silicon in single crystal form has been the material of choice for the first demonstration of the MIT microengine project. However, because it has a relatively low melting temperature, silicon is not an ideal material for ... -
A continuum theory of amorphous solids undergoing large deformations, with application to polymeric glasses
(2003-01)This paper summarizes a recently developed continuum theory for the elastic-viscoplastic deformation of amorphous solids such as polymeric and metallic glasses. Introducing an internal-state variable that represents the ... -
Defects in Self Assembled Colloidal Crystals
(2005-01)Colloidal self assembly is an efficient method for making 3-D ordered nanostructures suitable for materials such as photonic crystals and macroscopic solids for catalysis and sensor applications. Colloidal crystals grown ...
