Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 52 for “"Strain engineering"”.
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High Deviatoric Strain Engineering/
… or irreversibly by imposing elastic or inelastic strain, leading to change of properties. This defines the concept of strain engineering, which includes both elastic strain engineering (ESE) and inelastic strain engineering (ISE). In this thesis, we study ESE and ISE by deviatoric (nonhydrostatic) …
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Discrete Strain Engineering in Graphene
… mechanical and electrical properties. Strain engineering in graphene is the attempt to control its properties with mechanical strain. Previous research in this area has come up with an approach using a continuum theory to describe the strain induced gauge fields in graphene; however, …
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Process-induced strain engineering in two dimensional semiconductors
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Reconfigurable strain engineering of atomically-thin van der Waals materials
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-12-01
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Deep elastic strain engineering of materials electronic properties by machine learning
The introduction of elastic strains has become an appealing strategy for providing unique and exciting electronic properties in nanostructured materials. Recent successes in diamond and silicon deformation experiments further extended the applicable strain levels in these materials, harbingering a …
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Strain engineering and biosensor development for efficient biofuel production by Saccharomyces cerevisiae
Metabolic engineering of Saccharomyces cerevisiae is an attractive approach to enhance the production of cellulosic ethanol, fatty alcohols and other advanced biofuels. Production of cellulosic ethanol from lignocelluloses has attracted a lot of interest and significant improvement has been made to …
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New modalities for strain engineering of lead-free perovskite ferroelectric thin films
… thin films have shown that large compressive strains can drive the formation of complex mixed-phase structures with enhanced electromechanical responses (4-5% strains). In this work, we probe the nanoscale distribution of phases present in these mixed-phase structures using a combination of …
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Interfacial mechanics of strain engineering in thin film capped two-dimensional materials
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-08-01
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Transport in thin-body MOSFETs fabricated in strained Si and strained Si/SiGe heterostructures on insulator
… channel mobility enhancement techniques such as strain engineering, with non-classical MOS device architectures, such as ultra-thin body or multiple-gate structures, offers the promise of maximizing current drive while maintaining the electrostatic control required for aggressive device scaling …
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Optical Characterisation of Strain and Defects in 2D Photonic Materials
Strain and defect engineering have shown to be powerful tools in modifying optoelectronic properties of semiconductors. This thesis aims to advance the fundamental understanding of electronic and optical properties in material systems with broken inversion symmetries and to use this understanding …
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Fabrication and characterization of advanced ALGaN/GaN high-electron-mobility transistors
… such as in situ surface passivation, strain engineering, and complementary metal-oxide-semiconductor (CMOS) compatible gold-free process, were developed to enhance the electrical characteristics of AlGaN/GaN metal-oxide-semiconductor high-electron-mobility transistors (MOS-HEMTs). …
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Formation of three-dimensional graphene structures by controlled thermal activation of polymeric shape memory substrates
… methods such as relaxation of mechanically pre-strained elastomers, contraction of solvent swollen hydrogels, or thermal expansion mismatch between the surface film and substrate. The proposed methods will enable facile large-scale topographical and strain engineering of not only graphene and …
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Control of Light-Matter Interactions via Nanostructured Photonic Materials
… of light-matter interactions via nanoscale engineering of material systems. When material systems are structured on the nanoscale, their optical responses can be dramatically altered. In this thesis, this is done in two primary ways: One method is by changing the geometry of nanostructures …
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Tuning Strong Correlated Properties in EuTiO3 Thin Films Grown by Pulsed Laser Deposition
… multiferroic) and magnetoelectric coupling via strain engineering. Besides phase transition induced by strain engineering, there is an increasing interest in exploring the magnetocaloric effect (MCE) in ETO-based bulk materials. First, systematic studies for optimizing the growth condition for …
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Graphene characterization and device fabrication: doping analysis, strains engineering towards terahertz radiation
… transport and THz radiation devices, as well as strain engineering. These approaches could be potentially used to produce next generation electrical devices, photonics devices and generate ultra-high pseudomagnetic fields. To analyze graphene’s quality, I use multi-variable Raman spectroscopy for …
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Phenotypic diversity as a tool to guide and optimize random strain improvement approaches
… have relied and will continue to rely on strain engineering. Traditional methods comprising directed genetic modifications (i.e. targeting specific genes) have been quite successful in improving several phenotypes of industrial interest. Evolutionary approaches have also contributed much …
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Probing structure-function relationships at catalytic surfaces with emerging electroanalytical tools
… of surface structure on adsorbate reactivity. Strain engineering is an emerging concept in materials science where an engineered lattice deformation is used to tune the properties of functional materials. Our newly developed platform utilizes piezoelectric materials to induce strain in thin …
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Heterogeneous Integration of Spin-Photon Interfaces with s Scalable CMOS Platform
… spin-photon interface design, quantum emitter strain engineering, scalable high-quality fabrication technology, general architecture theoretical analysis, and AI-assistant quantum resource scheduling for a deep discussion of the different essential components of the system.
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Domain Wall Based Magnonics in Iron Garnet
… be tailored through elemental substitution or strain engineering in thin films. Furthermore, relativistic domain wall velocities reported in yttrium iron garnet (YIG), bismuth substituted YIG, and thulium iron garnet lay the foundations for high-speed operation. These unique attributes position …
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