Index Catalog // Arch : Northwestern University Institutional Repository

Formwork Pressure of Self-Consolidating Concrete: Influence of Flocculation Mechanisms, Structural Rebuilding, Thixotropy and Rheology

Description:: While self-consolidating concrete (SCC) may no longer be considered a "new concrete", there are still significant challenges to overcome before there is broader acceptance of SCC. One of these challenges concerns the formwork pressure exerted by SCC. A major advantage of SCC is the accelerated casting process due to the...
Keyword:: Material Science and Engineering
Subject:: Civil and Environmental Engineering
Creator:: Raissa Patricia Ferron
Owner:: Scholarly Digital Publishing
Date Uploaded:: 10/02/2018
Date Modified:: 10/02/2018
Date Created:: 2008-12-09
Resource Type:: Dissertation

Nanoscale Investigation of Platinum Nanoparticles on SrTiO3 Grown via Physical Vapor Deposition and Atomic Layer Deposition

Description:: This dissertation examines growth of platinum nanoparticles from vapor deposition on SrTiO3 using a characterization approach that combines imaging techniques and X-ray methods. The primary suite of characterization probes includes atomic force microscopy (AFM), grazing-incidence small-angle X-ray scattering (GISAXS), X-ray fluorescence (XRF), scanning electron microscopy (SEM), and X-ray absorption spectroscopy...
Keyword:: Material Science and Engineering
Subject:: Materials Science and Engineering
Creator:: Steven Christensen
Owner:: Scholarly Digital Publishing
Date Uploaded:: 10/01/2018
Date Modified:: 10/01/2018
Date Created:: 2008-12-08
Resource Type:: Dissertation

On Engineering the Microstructure of High-Performance Concretes to Improve Strength, Rheology, Toughness, and Frangibility

Description:: The research reported in this dissertation covers the development of two high-performance concrete materials, Very-High-Strength Concrete (VHSC) and Frangible Concrete, and the philosophy of engineering the microstructure of these materials to produce their specific beneficial traits. The underlying problem addressed was how to optimize their design to maximize their desirable...
Keyword:: Material Science and Engineering
Subject:: Civil and Environmental Engineering
Creator:: Edward Francis O'Neil
Owner:: Scholarly Digital Publishing
Date Uploaded:: 09/20/2018
Date Modified:: 09/20/2018
Date Created:: 2008-12-03
Resource Type:: Dissertation

Computational Design of Precipitation-Strengthened TiNi-Based Shape Memory Alloys

Description:: Motivated by performance requirements of future medical stent applications, experimental research addresses the design of novel TiNi-based, superelastic shape-memory alloys employing nanoscale precipitation strengthening to minimize accommodation slip for cyclic stability and to increase output stress capability for smaller devices. Using a thermodynamic database describing the B2 and L21 phases...
Keyword:: Material Science and Engineering
Subject:: Materials Science and Engineering
Creator:: Matthew D. Bender
Owner:: Scholarly Digital Publishing
Date Uploaded:: 09/13/2018
Date Modified:: 09/13/2018
Date Created:: 2008-07-21
Resource Type:: Dissertation

The Structural, Mechanical, and Osmotic Properties of Acrylic Triblock Copolymer Gels Determined by Self-Consistent Mean Field Theory and Experiment

Description:: In recent years, research has expanded the uses of triblock copolymer gels to a wide variety of applications including everything from ceramics processing to regenerative medicine and drug delivery. The research presented in this dissertation focuses on a physically crosslinked, block copolymers gel system in a selective solvent. This system...
Keyword:: Material Science and Engineering
Subject:: Materials Science and Engineering
Creator:: Rafael Edmundo Bras
Owner:: Scholarly Digital Publishing
Date Uploaded:: 09/13/2018
Date Modified:: 09/13/2018
Date Created:: 2008-06-23
Resource Type:: Dissertation

Self-Assembly of Organic Semiconductors and their Mineralization into Hybrid Nanostructures

Description:: This dissertation demonstrates how self-assembly can direct nanoscale ordering and optimize electronic properties of organic semiconductors, as well as organic-inorganic hybrids. In excitonic solar cells, controlling the ordering and interfaces between electron-transporting (n-type) and hole-transporting (p-type) domains is crucial. In addressing this challenge, hybrid nanostructures were designed by mineralization of...
Keyword:: Material Science and Engineering
Subject:: Materials Science and Engineering
Creator:: Marina Sofos
Owner:: Scholarly Digital Publishing
Date Uploaded:: 08/30/2018
Date Modified:: 08/30/2018
Date Created:: 2007-12-10
Resource Type:: Dissertation

Nanostructure Fabrication Using Inorganic Sols and Electron Beam Lithography

Description:: Dimensionally constrained material systems are at the forefront of current materials research because of their novel and often enhanced physical, chemical and biological properties. The dimensionality effects are pervasive through different classes of materials including ceramics, metals and polymers. Often times dimensionality effects are manifested as internal structure variations in...
Keyword:: Material Science and Engineering
Subject:: Materials Science and Engineering
Creator:: Suresh Kumar Donthu
Owner:: Scholarly Digital Publishing
Date Uploaded:: 08/27/2018
Date Modified:: 08/27/2018
Date Created:: 2007-12-06
Resource Type:: Dissertation

Studies of Structural Dynamics in Polymer Blends Using Rheology and Small-Angle X-Ray Scattering Techniques

Description:: Structural dynamics in three polymer blend systems, differing largely with respect to morphology, have been investigated. The first system, composed of two immiscible homopolymers, exhibits a microstructure of micron-sized droplets dispersed in a matrix phase. We have examined small-angle x-ray scattering (SAXS) as a new approach for conducting in situ...
Keyword:: Material Science and Engineering
Subject:: Chemical and Biological Engineering
Creator:: Kristin Leigh Brinker
Owner:: Scholarly Digital Publishing
Date Uploaded:: 08/01/2018
Date Modified:: 08/01/2018
Date Created:: 2007-08-29
Resource Type:: Dissertation

Optical and Magneto-Optical Properties of Ferromagnetic InMnAs Thin Films and its Alloys

Description:: The optical and magneto-optical properties of the ferromagnetic semiconductors, InMnAs and its alloy InMnAsP were investigated to determine the band structure and nature of the ferromagnetism in these materials. Alloys were grown by metal-organic vapor phase epitaxy. Infrared absorption of InMnAs was investigated to determine the presence and properties of...
Keyword:: Material Science and Engineering
Subject:: Materials Science and Engineering
Creator:: Phillip Tang Chiu
Owner:: Scholarly Digital Publishing
Date Uploaded:: 05/22/2018
Date Modified:: 05/22/2018
Date Created:: 2007-04-18
Resource Type:: Dissertation

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Formwork Pressure of Self-Consolidating Concrete: Influence of Flocculation Mechanisms, Structural Rebuilding, Thixotropy and Rheology

Nanoscale Investigation of Platinum Nanoparticles on SrTiO3 Grown via Physical Vapor Deposition and Atomic Layer Deposition

On Engineering the Microstructure of High-Performance Concretes to Improve Strength, Rheology, Toughness, and Frangibility

Computational Design of Precipitation-Strengthened TiNi-Based Shape Memory Alloys

The Structural, Mechanical, and Osmotic Properties of Acrylic Triblock Copolymer Gels Determined by Self-Consistent Mean Field Theory and Experiment

Self-Assembly of Organic Semiconductors and their Mineralization into Hybrid Nanostructures

Nanostructure Fabrication Using Inorganic Sols and Electron Beam Lithography

Studies of Structural Dynamics in Polymer Blends Using Rheology and Small-Angle X-Ray Scattering Techniques

Optical and Magneto-Optical Properties of Ferromagnetic InMnAs Thin Films and its Alloys

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