Browsing Department of Materials Science and Engineering by Title
Now showing items 1878-1897 of 1933
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Ultra-lightweight nanorelief networks : photopatterned microframes
(Massachusetts Institute of Technology, 2007)Lightweight nano-network structures in polymers have been fabricated and investigated for their mechanical properties. Fabrication techniques via holographic interference lithography and phase mask lithography were implemented ... -
Ultrastructural studies of the mechanism governing compressive deformation in rigid-rod polymers
(Massachusetts Institute of Technology, 1993) -
The uncommon nature of point defects in organic-inorganic Perovskite solar cells
(Massachusetts Institute of Technology, 2018)Organic-inorganic perovskite solar cells (PSCs) have shown enormous success in the past decade, increasing in power conversion efficiency from ~4% in 2009 to >22%. One of the critical properties that contributed to this ... -
Undercooling and rapid solidification of Fe-Cr-Ni ternary alloys
(Massachusetts Institute of Technology, 1994) -
Underfill material selection for flip chip technology
(Massachusetts Institute of Technology, 1998)Six underfill materials were examined for the selection of an appropriate underfill material for Digital Equipment Corporation's flip chip development project. Several tests were performed to determine the material properties, ... -
Understanding and designing carbon-based thermoelectric materials with atomic-scale simulations
(Massachusetts Institute of Technology, 2015)Thermoelectric (TE) materials, which can convert unused waste heat into useful electricity or vice versa, could play an important role in solving the current global energy challenge of providing sustainable and clean energy. ... -
Understanding and designing high power and high energy density cathode materials for lithium ion batteries by experiments and first principles computations
(Massachusetts Institute of Technology, 2012)A new layered compound LiNi2/3Sb1/30 2 was synthesized and tested electrochemically to understand the effect of the transition metals on the structural stability of the layered compound upon Li de-intercalation. The ... -
Understanding and development of combined acoustic and magnetic actuation of Ni₂MnGa single crystals
(Massachusetts Institute of Technology, 2007)Ni-Mn-Ga based ferromagnetic shape memory alloys (FSMAs) have emerged as a promising new class of active materials capable of producing a large (several %) magnetic-field-induced strain (MFIS). FSMAs still have several ... -
Understanding and engineering azobenzene for thermal energy storage
(Massachusetts Institute of Technology, 2017)This thesis focuses on the understanding and engineering of a molecule known as azobenzene which holds unique properties for thermal storage applications. The azobenzene molecule undergoes structural change into a metastable ... -
Understanding defects in germanium and silicon for optoelectronic energy conversion
(Massachusetts Institute of Technology, 2016)This thesis explores bulk and interface defects in germanium (Ge) and silicon (Si) with a focus on understanding the impact defect related bandgap states will have on optoelectronic applications. Optoelectronic devices are ... -
Understanding electronic and optical properties of PbS QDs for improved photovoltaic performance
(Massachusetts Institute of Technology, 2015)Photovoltaic (PV) solar cells that constitute semiconducting sunlight absorber and metallic electrical contacts convert solar energy to electricity. Even though silicon represents roughly 90% of installed solar PV capacity ... -
Understanding magnetic field reversal mechanisms in mesoscopic magnetic multilayer ring structures
(Massachusetts Institute of Technology, 2008)Patterned pseudo spin-valve rings show great promise for device applications due to their non-volatility and variety of stable magnetic states. However, the magnetic reversal of these elements under an applied field is ... -
Understanding the active sites of Mg-Al oxide catalysts in the formation of aromatic platform chemicals from acetaldehyde
(Massachusetts Institute of Technology, 2018)The aromatization of acetaldehyde derived from bio-based feedstocks offers a sustainable route to obtaining valuable BTX (benzene, toluene, and xylenes)-like platform chemicals traditionally produced from petroleum naphtha. ... -
Understanding the catalytic activity of oxides through their electronic structure and surface chemistry
(Massachusetts Institute of Technology, 2016)The intermittent nature of renewable energy sources requires a clean, scalable means of converting and storing energy. Water electrolysis can sustainably achieve this goal by storing energy in the bonds of oxygen and ... -
Understanding the economics and material platform of bidirectional transceiver for plastic optical fiber
(Massachusetts Institute of Technology, 2005)Limitations of electrical wires result in distortion and dispersion of the signal for long distances. That have emerged optical communication as the only way of communication for long distances. For medium distances optics ... -
Understanding the effect of protonation on the self-assembly of a model polyelectrolyte-neutral block copolymer
(Massachusetts Institute of Technology, 2016)Charge-containing polymers are used in a wide variety of commercial products including fuel cell membranes, heat sealing packages, and golf ball covers. Traditionally made as random copolymers of charged and uncharged ... -
Understanding the oxidation and reduction process in transparent conducting oxides
(Massachusetts Institute of Technology, 2019)Transparent conductors play important roles in many optoelectronic devices such as LEDs, thin film solar cells, and smart windows through their ability to efficiently transport both photons and electrons. Simultaneous ... -
Upflow anaerobic sludge blanket reactors for treatment of wastewater from the brewery industry
(Massachusetts Institute of Technology, 2010)Anaerobic digestion can be utilized to convert industrial wastewater into clean water and energy. The goal of this project was to set up lab-scale anaerobic digesters to collect data that will be used to develop and validate ... -
Use of the design structure matrix in the improvement of an automobile development process
(Massachusetts Institute of Technology, 1991) -
Use of uranium decay series for dating an archaeological smelting site
(Massachusetts Institute of Technology, 2008)Through the identification of phases and their isotopic composition and variability, an assessment of the applicability of uranium decay series dating to El Manchon slags was made. El Manchon is the only Mesoamerican site ...
