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 121 for “"bulk materials"”.
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Investigation into alignment of carbon nanotubes within bulk materials printed from aqueous dispersions
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Characterizing the potential energy surface of two dimensional and bulk materials using high dimensional neural network potentials
… and its application to six systems: 2D silica, bulk silica, graphene, diamond, hexagonal boron nitride, and cubic boron nitride. Here, a general mapping from atomic coordinates to the potential energy surface is obtained using a feed-forward artificial neural network. An approximate Density …
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The microstructure, mechanical and superconducting properties of (RE)BCO bulk single grains
High-temperature superconducting RE-Ba-Cu-O bulk single grains [(RE)BCO, where RE = Y, Gd, Eu, Sm or Nd] show a wide variability in their mechanical and magnetic flux trapping properties. These variations attribute primarily to variations in the microstructure of (RE)BCO bulk materials. While the …
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Elastically-isotropic mechanical metamaterials : theory and experiments
… requires the development of low-density materials featuring high mechanical properties with an emphasis on high-specific stiffness and strength. Besides improvement in the composition of bulk materials, high specific mechanical properties are obtained by carefully architecting materials …
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Applications of infrared fibers in temperature sensing
… investigation is in progress to develop new materials which exhibit lower losses than silica. These bulk materials could then be used to fabricate ultralow loss optical fibers which operate farther out in the infrared than do silica fibers. Such infrared fibers could be used in long, …
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Nanoscale Characterisation of Heterointerfaces in 2D Materials
For the last 80 years, bulk materials, such as silicon, have underpinned electronic devices[1]. Whilst remarkable improvements to performance have been achieved through miniaturisation, progress is slowing as we approach the physical limitations of bulk materials[1, 2]. As materials which naturally …
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Molecular Dynamics Simulations of the Mechanical Deformation Behavior of Face-Centered Cubic Metallic Nanowires
Nanoscale materials have become an active area of research due to the enhanced mechanical properties of the nanomaterials in comparison to their respective bulk materials. The effect that the size and shape of a nanomaterial has on its mechanical properties is important to understand if these …
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Thermodynamic modeling and microcalorimetry of nanostructured materials for capacitive thermal management of electronics
… thermal management based on phase change materials potentially offers a fan-less thermal management for such transient profiles. However, such capacitive management becomes feasible only if there is a significant enhancement in the enthalpy change per unit volume of the phase change …
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End-of-life analysis of nanotechnology products
… melting point and specific heat capacity of nanomaterials may be higher than that of their corresponding bulk materials. The melting point elevation and specific heat capacity enhancement of nanomaterials may result in increased energy consumption and waste gases emission at the end-of-life (EOL) …
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The superconducting properties, composition and microstructure of nanocrystalline $A15\ \textnormal{Nb}_{3}(\textnormal{Al}_{1-x}\textnormal{Ge}_{x})$ superconductors for high magnetic field applications
… heat treatments was investigated for those materials HIP’ed at 600 $^{\circ}\textnormal{C}$ and 1200 $^{\circ}\textnormal{C}$. For comparison purposes, heat treatments were also performed on milled powders. Nanocrystalline bulk materials were characterized using a.c. magnetometry, …
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Mesoporous silica encapsulated metal nanoparticles in catalysis
… dramatic performance in comparison to bulk materials in heterogeneous catalysis, due to their high density of under coordinate sites associated with altered electronic properties. The structural and compositional design of bimetallic nanoparticles can further afford the precise control …
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Fabrication of metallic nanostructures from sputtered nanocluster precursors
… they display that are somewhere between bulk materials and atomic behavior. Recently, techniques have been explored to exploit the depressed melting point effect that small clusters exhibit to fabricate integrated circuit components. These techniques have only been attempted with …
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Polymer Transcrystallization Induced by Carbon Nanotube and Graphene Fibers
<p>Carbon nanomaterials provide applications in a wide variety of roles, including as reinforcing materials, thermal and electrical conductors, and optical absorbers. While their benefits can be applied as bulk materials, their implementation into polymer materials as fillers allows for efficient …
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The potential contribution of industrial symbiosis to greenhouse gas emissions mitigation
… climate change. The global production of bulk materials such as steel, cement, paper, and aluminium has almost tripled over the past three decades. Strategies for increasing energy efficiency and material efficiency have been implemented to reduce specific energy demand as well as …
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DEVELOPMENT AND OPTIMIZATION OF BACK SURFACE ACRYLICSOLARMIRRORS TO ASSURE 25 YEAR LIFETIME PERFORMANCE
Use ofmaterials without sufficient track records, in technologies that performoutdoorsfor long periods, may result in premature degradation or outright failure; howevermanyunproven material systems have not been evaluated for their lifetime performance. Inaddition, they can present opportunities to …
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Thermo-optic Phase Spectroscopy techniques for multiscale thermal conductance characterization in semiconductor integrated circuits
… thermal conductance characterization across bulk materials, buried films and interfaces, and nanoscale films. Three variants are developed: Displacement TOPS (D-TOPS) for bulk solids, Immersion TOPS (I-TOPS) for deeply embedded films and interfaces, and High-Resolution TOPS (HR-TOPS) for …
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Effect of 3D Architecture on Energy Dissipation during High-speed Particle Impact
Ultralight mechanical metamaterials enabled by additive manufacturing (AM) have previously achieved density-normalized strength and stiffness properties that are inaccessible to monolithic materials, but the majority of this work has focused on static loading while the mechanical properties of …
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Modeling the thermoelectric properties of bulk and nanocomposite thermoelectric materials
Thermoelectric materials are materials which are capable of converting heat directly into electricity. They have long been used in specialized fields where high reliability is needed, such as space power generation. Recently, certain nanostructured materials have been fabricated with high …
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Optical studies of DNA-wrapped carbon nanotubes
… channels that could not be clearly observed in bulk materials system. In light of the recent developments in the excitonic theory of D systems in general and of 1D carbon nanotubes in particular, the observed phonon-assisted processes are interpreted and examined in terms of excitonic states. An …
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Thermal properties of nanowires and nanotubes : modeling and experiments
… of nanowires can differ greatly from their bulk counterparts, the theoretical and experimental understanding of these differences is still limited. Thermal performance is especially important for nanowire thermoelectrics, which are expected to have energy conversion efficiencies far superior …
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