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Hierarchical layered-silicate-- lamellar triblock copolymer nanocomposites
(Massachusetts Institute of Technology, 2003)
The fundamental role of the layered-silicates in a styrene-butadiene-styrene triblock copolymer (SBS) as a function of layered-silicate dispersion during deformation was investigated. Predominantly immiscible composites ...
Mechanical stiffness-defined matrices for stem cell research and drug screening
(Massachusetts Institute of Technology, 2008)
Synthetic polymer matrices or subtrata with tailored elastic properties provide a powerful method to direct biological cell' differentiation and foster cell multiplication. By changing the stiffness of the substrate, human ...
MOCVD growth of In GaP-based heterostructures for light emitting devices
(Massachusetts Institute of Technology, 2004)
In this work, we examine fundamental materials processes in the growth of indium gallium phosphide (InGaP) via metalorganic chemical vapor deposition (MOCVD). In particular, we realize improvements in the epitaxial integration ...
Surface forces during electrophoretic assembly of micron scale silica particles
(Massachusetts Institute of Technology, 2004)
A system of platinum microelectrodes was fabricated on a sapphire substrate by lithographic patterning and used to manipulate 1.58 [mu]m silica particles in-plane. A digital video system was used to image the motion of ...
Effect of radiation on silicon and borosilicate glass
(Massachusetts Institute of Technology, 2003)
A study was made that is logically divided into two parts, both involving radiation damage effects. The first is a study of the effects of neutron and gamma radiation on the dimensions of two borosilicate glasses, Pyrex® ...
Design of chemistry and morphology of polymer filtration membranes
(Massachusetts Institute of Technology, 2003)
To improve membrane materials in water filtration, which currently display broad pore size distribution, hydrophobic chemistry, and fouling behavior, a novel design of chemistry and morphology of membranes is employed. ...
Modeling effects of microstructure for electrically active materials
(Massachusetts Institute of Technology, 2003)
A theoretical framework is proposed for the description of multifunctional material properties. The focus of this theory is on deriving equilibrium and kinetic equations for electrically active materials, particularly for ...
Magnetic properties of lithographically patterned thin film magnetic elements for magnetic random access memory applications
(Massachusetts Institute of Technology, 2003)
Interference lithography, together with ion beam etching or lift-off processes, has been utilized to produce large area periodic rectangular patterns. Single layer Co, NiFe, and multilayer Co/Cu/NiFe pseudo spin valve films ...
Structure and properties of hydrogen and covalently bonded side group liquid crystalline block copolymers
(Massachusetts Institute of Technology, 2003)
Diblock copolymers incorporating liquid crystallinity via a lateral attachment of mesogenic species to a flexible backbone were studied for their microstructure-property relationships. Two families of materials were studied, ...
Fabrication and characterization of wafer-level gold thermocompression bonding
(Massachusetts Institute of Technology, 2003)
Packaging is an important aspect of microelectromechanical systems (MEMS) design. As MEMS devices traverse multiple energy domains, sometimes operating in hostile conditions, the need to maintain reliability and functionality ...