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-
- Description:
- As more thermoelectric materials/devices make it into the market for various applications, severalaspects need to be explored and optimized, beyond simply targeting high conversion efficiency at the material levels. One critical aspect is the guarantee of mechanical stability at both the material and the device level, which demands deeper understanding...
- Subject:
- Materials Science
- Creator:
- Al Malki, Muath Mohammed
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 05/31/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_988614 and http://dissertations.umi.com/northwestern:16622
-
- Description:
- The on-going demand for miniaturized optical and on-chip photonic systems of the future has led to a few potential solutions in the literature. Recent advances in van der Waals and 2-dimensional materials signal a bright future for the next generation, compact electronic and photonic devices. With reduced dimensionality and material...
- Keyword:
- Polarization, Phonons, van der Waals, Plasmons, Wave plate, and 2D materials
- Subject:
- Optics, Materials Science, and Electromagnetics
- Creator:
- Abedini Dereshgi, Sina
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 05/31/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16396 and etdadmin_upload_958293
-
- Description:
- Nanomaterials present an exciting landscape of innovation at length scales below 100 nm, wherein controllable synthesis and materials metrology have led to tunable structure-property relationships and next-generation products. The disruptive field of nanotechnology is poised to capitalize upon the exotic chemistry and physics of these nanomaterials to enable more efficient...
- Keyword:
- graphene, scalable manufacturing, nanomaterials, nanomanufacturing, 2D materials, and electronic materials
- Subject:
- Nanotechnology, Materials Science, and Engineering
- Creator:
- Downing, Julia Rocio
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 05/31/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16548 and etdadmin_upload_985168
-
- Description:
- This thesis explores the potential of two-dimensional (2D) or van der Waals (vdW) materials for printed optoelectronic devices. The research focuses on the development of processing, imaging, and modeling of materials and thin-film devices to optimize performance and introduce novel properties. A gate-dependent resistor network model is presented that establishes...
- Keyword:
- scanning probe microscopy, transition metal dichalcogenides, thin-film transistors, finite element simulation, printed electronics, and 2D materials
- Subject:
- Materials Science
- Creator:
- Zhu, Zhehao
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 05/31/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16504 and etdadmin_upload_982806
-
- Description:
- Single-use plastic waste pollution will cause significant harm to the environment if left unaddressed. One possible mitigation strategy is to develop processes, e.g. catalytic hydrogenolysis, that can convert (i.e. upcycle) waste plastics into value-added products capable of participating in a circular economy. Platinum (Pt) catalysts on strontium titanate nanocuboid supports...
- Subject:
- Chemistry and Materials Science
- Creator:
- Peczak, Ian Lukasz
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 05/31/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16513 and etdadmin_upload_983506
-
- Description:
- Thermoelectric devices convert between temperature gradients and electricity, implying numerous applications, such as powering exploratory space vehicles, industrial waste-heat recovery, and solid- state refrigeration. Thermoelectric devices consist of doped p-type and n-type semiconductor legs, and the overall device efficiency depends on the transport properties of these semiconductor materials. High-performing thermoelectric...
- Keyword:
- band engineering, electronic structure, density functional theory, thermoelectrics, group theory, and tight-binding
- Subject:
- Materials Science
- Creator:
- Brod, Madison K
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 05/31/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16437 and etdadmin_upload_967109
-
- Description:
- The field of materials discovery is undergoing an unprecedented transition from laboratory tocomputer. Behind this transition is the new ability to accurately compute material properties, especially energetic stability, from first principles with density functional theory (DFT). However, DFT remains computationally expensive, and DFT-based materials discovery is intractable, especially in high...
- Keyword:
- High throughput, Inorganic compounds, Big data, Density functional theory, Materials discovery, and Machine learning
- Subject:
- Materials Science, Condensed matter physics, and Computational chemistry
- Creator:
- Griesemer, Sean Darius
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 05/31/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16606 and etdadmin_upload_986816
-
- Description:
- The on-going demand for miniaturized optical and on-chip photonic systems of the future has led to a few potential solutions in the literature. Recent advances in van der Waals and 2-dimensional materials signal a bright future for the next generation, compact electronic and photonic devices. With reduced dimensionality and material...
- Keyword:
- Polarization, Phonons, van der Waals, Plasmons, Wave plate, and 2D materials
- Subject:
- Optics, Materials Science, and Electromagnetics
- Creator:
- Abedini Dereshgi, Sina
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 03/24/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16396 and etdadmin_upload_958293
-
- Description:
- Atomistic methods offer a powerful set of tools in the study of materials systems, as they allow materials scientists to ask questions with a high degree of specificity. They are well suited for studying and designing energy materials, critical due to the climate crisis, in part due to their ability...
- Subject:
- Materials Science
- Creator:
- Patel, Shane
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 03/24/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16415 and etdadmin_upload_962311
-
- Description:
- A fundamental materials science question is “why and how will this material form?” The experimental,computation, and time resources necessary to answer this question consume significant resources due to the predominantly trial-and-error based approaches common in materials research. This dissertation reintroduces a number of fundamental thermodynamics-based tools for the study of...
- Keyword:
- Density Functional Theory, Aqueous Synthesis, Driving Force, Thermodynamics, Pourbaix Diagram, and Speciation
- Subject:
- Physics, Chemistry, and Materials Science
- Creator:
- Walters, Lauren Nichole
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16360 and etdadmin_upload_946544
-
- Description:
- Understanding organization of soft materials on mesoscopic and nanoscopic scales is importantfor materials design. In this regard, non-van der Waals interactions such as hydrogen bonding and electrostatic interactions offer great opportunities due to the richness and diversity in morphological structures they produce. The primary reason for this is that these...
- Subject:
- Molecular physics and Materials Science
- Creator:
- Prusty, Debadutta
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16315 and etdadmin_upload_938426
-
- Description:
- Since its introduction as an artist’s pigment in the earth 20th century, titanium white has become one of the most common white pigments. The early formulations of titanium white contained anatase, which has been studied to facilitate degradation of oil paint under UV illumination. Around the 1940s production shifted to...
- Subject:
- Materials Science and Computational chemistry
- Creator:
- Schmitt, Thomas
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_941215 and http://dissertations.umi.com/northwestern:16325
-
- Description:
- Wireless power strategies are critical to system level implementation of bio-integrated devices. To achieve mechanically robust, manufacturable systems, batteries are often integrated as an on-board power source to support sensing, wireless communication and signal conditioning. Unfortunately, most sources of battery power use hazardous and environmentally harmful materials, which frustrate incorporation...
- Subject:
- Chemistry, Materials Science, and Biomedical engineering
- Creator:
- Huang, Ivy
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_934213 and http://dissertations.umi.com/northwestern:16294
-
- Description:
- Biomineralization relies on the regulation of localized environments to control how minerals are formed. Through the use of confinement and specific additives, the organism is able to change the energy landscape of nucleation and growth to build single crystals with unusual morphologies. In order to better understand the environments in...
- Subject:
- Materials Science
- Creator:
- Duggins, Danielle
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_937458 and http://dissertations.umi.com/northwestern:16309
-
- Description:
- Industrial processes heavily rely on catalysts to control product selectivity and lower energy barriers required for chemical transformations. Catalysts are most commonly solid heterogeneous catalysts that facilitate separations from reaction mixtures and enhance recyclability. Heterogeneous catalysts used in industrial processes exhibit efficacious results, but in certain instances drawing structure-function relationships...
- Keyword:
- Polymerization, Oligomerization, Metal–Organic Frameworks, Structure-property relationships, and Heterogeneous catalysis
- Subject:
- Chemistry and Materials Science
- Creator:
- Goetjen, Timothy
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_938937 and http://dissertations.umi.com/northwestern:16320
-
- Description:
- Selecting the best material to deliver optimum performance in real-world applications is one of the most significant challenges in engineering. Hundreds of thousands of computationally-predicted, but experimentally unexplored materials exist today in the public inorganic material databases as candidates for consideration. This thesis discusses three projects in the domain of...
- Keyword:
- statistical modeling, materials design, uncertainty quantification, materials selection, computational materials, and materials informatics
- Subject:
- Materials Science
- Creator:
- Gopakumar, Abhijith Mini
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_947056 and http://dissertations.umi.com/northwestern:16368
-
- Description:
- From the early usage of metallic thin films as mirrors tracing back to 2900 BC, to the modern thin film photonic circuits as a mature optical processing platform, and to the growing class of atomically-thin two-dimensional (2D) materials with diverse and tailorable properties, thin film materials have played an important...
- Keyword:
- Two-dimensional materials, Photonic circuits, Thin film materials, Topological photonics, Electron-beam lithography, and Optical materials
- Subject:
- Physics and Materials Science
- Creator:
- Liu, Pufan
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_946295 and http://dissertations.umi.com/northwestern:16358
-
- Description:
- In this dissertation, I summarize my findings of the dynamics of colloidal suspensions over a large range of volume fractions in two systems: drop impact and film rupture. The existence of a deformable surface in both these systems allows me to capture the consequences of non-Newtonian flow using high-speed imaging....
- Keyword:
- shear rheology, drop impact, Fluid dynamics, High-speed imaging, Soft matter, and Colloidal suspensions
- Subject:
- Physics and Materials Science
- Creator:
- Shah, Phalguni S.
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_937776 and http://dissertations.umi.com/northwestern:16311
-
- Description:
- Elemental powder blends are an emerging alternative to prealloyed powders for high-throughput alloy design via additive manufacturing techniques due to their flexibility, low cost, and ease of customization. This dissertation investigates elemental alloying elements (Sc and Zr) which are high-melting and highly reactive, unlike previous work which focused on more...
- Keyword:
- additive manufacturing, in situ diffraction, elemental blends, laser powder-bed fusion, aluminum, and creep
- Subject:
- Materials Science
- Creator:
- Glerum, Jennifer Anne
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16304 and etdadmin_upload_936163
-
- Description:
- Protein-based biomaterials are widely used in biomedical applications and mechanical support because of their novel structural flexibility, biocompatibility and mechanical properties. Protein-based biomaterials outperform traditional synthetic materials in various environments as traditional materials lack the diverse chemical functionalities that proteins offer. Novel bioinspired techniques such as directed evolution offer the...
- Subject:
- Bioengineering, Materials Science, and Chemical engineering
- Creator:
- Chen, Yusu
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 09/22/2022
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16130 and etdadmin_upload_912201