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Energy absorption in Ni-Mn-Ga/ polymer composites
(Massachusetts Institute of Technology, 2006)
In recent years Ni-Mn-Ga has attracted considerable attention as a new kind of actuator material. Off-stoichiometric single crystals of Ni2MnGa can regularly exhibit 6% strain in tetragonal martensites and orthorhombic ...
Tunable micro-cavities in photonic band-gap yarns and optical fibers
(Massachusetts Institute of Technology, 2006)
The vision behind this work is the fabrication of high performance innovative fiber-based optical components over kilometer length-scales. The optical properties of these fibers derive from their multilayer dielectric ...
Advanced engineered substrates for the integration of lattice-mismatched materials with silicon
(Massachusetts Institute of Technology, 2006)
The dramatic advances in Si/SiO2-based microelectronic processing witnessed over the past several decades can largely be attributed to relatively material-independent device scaling. However, with physical and economic ...
Anisotropic and tunable characteristics of the colloidal behavior of metal oxide surfaces
(Massachusetts Institute of Technology, 2006)
The electroosmotic behavior of the rutile polymorph of titanium dioxide was explored as a function of crystallographic orientation. Atomic force microscopy (AFM) was employed to make high-resolution force spectroscopy ...
Accurate nanofabrication techniques for high-index-contrast microphotonic devices
(Massachusetts Institute of Technology, 2005)
High-refractive-index-contrast microphotonic devices provide strong light confinement allowing for sharp waveguide bends and small dielectric optical resonators. They allow dense optical integration and unique applications ...
Crystallographically consistent percolation theory for grain boundary networks
(Massachusetts Institute of Technology, 2005)
Grain boundaries are known to play a role in many important material properties including creep resistance, ductility and cracking resistance. Although the structure and properties of individual boundaries are important, ...
Molecular-scale devices from first principles
(Massachusetts Institute of Technology, 2009)
Electronic structure calculations are becoming more widely applied to complex and realistic materials systems and devices, reaching well into the domain of nanotechnology, with applications that include metal-molecule ...
SiGe virtual substrate engineering for integration of III-V materials, microelectromechanical systems, and strained silicon MOSFETs with silicon
(Massachusetts Institute of Technology, 2001)
Ordered photonic microstructures
(Massachusetts Institute of Technology, 2001)
This thesis examines novel photonic materials systems possessing order in the atomic, microscopic, and macroscopic dimensional regimes. In the atomic order regime, a structure-property investigation is done for Er203 in ...
Substrate engineering for monolithic integration of III-V semiconductors with Si CMOS technology
(Massachusetts Institute of Technology, 2008)
Ge virtual substrates, fabricated using Si1-xGex-.Ge, compositionally graded buffers, enable the epitaxial growth of device-quality GaAs on Si substrates, but monolithic integration of III-V semiconductors with Si CMOS ...