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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 ...
Micro and nano mechanics of materials response during instrumented frictional sliding
(Massachusetts Institute of Technology, 2006)
Over the past decade, many computational studies have explored the mechanics of instrumented normal indentation. In contrast, very few studies have investigated quantitative aspects of frictional sliding contact in the ...
Block copolymer photonic crystals : towards self-assembled active optical elements
(Massachusetts Institute of Technology, 2006)
Block copolymers have proven to be a unique materials platform for easily fabricated large-area photonic crystals. While the basic concept of block copolymer based photonic band gap materials has been well demonstrated, ...
Electronic structure and quantum conductance of nanostructures
(Massachusetts Institute of Technology, 2006)
This thesis is dedicated to development and application of a novel large-scale first-principles approach to study the electronic structure and quantum conductance of realistic nanoscale materials. Electron transport at the ...
Deformation behavior of cylindrical block copolymer bicrystals : pathway to understanding block copolymer grain boundaries
(Massachusetts Institute of Technology, 2006)
Model bicrystals made by adhering pieces of near-single-crystal styrene-isoprene-styrene (SIS) cylindrical block copolymer (BCP), produced by a roll-casting process; yield various types of pure tilt grain boundaries. The ...
Boundary element modeling of elasticity in materials in terms of distribution of second phase structures
(Massachusetts Institute of Technology, 2006)
The Boundary Element Method is used to study the interaction of second phase objects in a material. In particular, this study examines the relationship between stress parameters, such as stress concentration and normal ...
Numerical modeling of interface dynamics and transport phenomena in transport-limited electrolysis processes
(Massachusetts Institute of Technology, 2006)
Electrochemical reactions in materials and processes induce morphological instability on the cathode, which can lead to porous deposits or system failure. The growth of the protrusion is a complex phenomenon which involves ...