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.
Results
Showing 1 to 17 of 17 for “"nanoscale thermal transport"”.
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Nanoscale Thermal Transport at Solid -Liquid Interfaces
… transient absorption measurement to probe thermal transport in Au-core polymer-shell nanoparticles. The addition of an organic co-solvent to the suspension causes the polystyrene component of the polymer shell to swell and this change in the microstructure of the shell increases the …
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Nanoscale Thermal Transport at Graphene-Soft Material Interfaces
… in matrices of soft materials are promising thermal management materials. A fundamental understanding of the thermal transport at graphene-soft material interfaces is essential for developing these nanocomposites. In this dissertation, thermal transport at graphene-octane interfaces was …
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Nanoscale thermal transport for biological and physical applications
… opportunities and overcomes challenges for many thermal transport applications. Yet, it requires a more fundamental scientific understanding of nanoscale transport. This thesis emphasizes how simulation, mathematical, and numerical methods can lead to more grounded studies of nanoscale thermal …
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Nanoscale thermal transport through solid-solid and solid-liquid interfaces
… presents an experimental investigation of heat transport through solid- solid and solid-liquid interfaces. Heat transport is a process initiated by the presence of a thermal gradient. All interfaces offer resistance to heat flow in the form of temperature drop at the interface. In micro and nano …
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Optical transient grating measurements of micro/nanoscale thermal transport and mechanical properties
… technique was used to study phonon mediated thermal transport in bulk and nanostructured semiconductors and surface wave propagation in a monolayer of micron sized spheres. In the transient grating technique two picosecond pulses are crossed to generate a spatially periodic intensity profile. …
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Control of Nanoscale Thermal Transport for Thermoelectric Energy Conversion and Thermal Rectification
Materials at the nanoscale show properties uniquely different from the bulk scale which when controlled can be utilized for variety of thermal management applications. Different applications require reduction, increase or directional control of thermal conductivity. This thesis focuses on …
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Variational approach to solving the phonon Boltzmann transport equation for analyzing nanoscale thermal transport experiments
… smaller length scales, and as a result the heat transport in these systems has entered the nanoscale regime. With increasing computational speed and power consumption, there is a need to efficiently dissipate the heat generated for proper thermal management of computer chips. The ability to …
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Observation and manipulation of the wave nature of phonon thermal transport through superlattices
… has shrunk, the importance of understanding nanoscale thermal transport has grown. In this thesis, we investigate thermal transport through superlattices (SLs), periodic layers of thin films, to better understand thermal conduction at these small scales. The classical picture of nanoscale …
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Thermal transport across transfer printed metal-dielectric interfaces: Influence of contact mechanics and nanoscale energy transport
Recent experiments suggest that the interfacial thermal conductance of transfer printed metal-dielectric interfaces is ~45 MW/m2K at 300K, approaching that of interfaces formed using physical vapor deposition. In this work, we investigate this anomalous result using a combination of theoretical …
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Quantitative mapping of nanothermal transport via Scanning Thermal Microscopy
… Amongst the vast realm of nanoresearch, thermal properties have gained interest in the past decades due their crucial importance in technological developments, ranging from mainstream semiconductor microelectronics to cutting edge quantum technologies. Whereas major standard techniques to …
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Physical and practical limits of a biomolecular control system using nanoparticles and electromagnetic field irradiation
… including computation, sensing, self-assembly, transport, and molecular machine design take advantage of natural biomolecular machinery. Further development of these technologies requires direct, external biomolecular control. This thesis proposes a simple control technique: a biomolecular …
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Molecular Simulation Of Nanoscale Transport Phenomena
Interest in nanoscale heat and mass transport has been augmented through current trends in nanotechnology research. The theme of this dissertation is to characterize electric charge, mass and thermal transport at the nanoscale using a fundamental molecular simulation method, namely molecular …
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Structural dynamics of photoexcited nanolayered perovskites studied by ultrafast x-ray diffraction
… the rich lattice dynamics exhibiting coherent transport of vibrational energy from local excitations via delocalized phonon modes of the samples. The complex deformations in tailored multilayers are identified to give rise to highly nonlinear x-ray diffraction responses due to transient …
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Thermal and thermoelectric properties of nanostructured materials and interfaces
… devices, solar cells, power electronics, thermal barrier coatings, and hard disk drives contain nanostructured materials where the thermal conductivity of the material is a critical parameter for the device performance. At the nanoscale, the mean free path and wavelength of heat carriers …
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Photothermal properties and applications of gold nanorods
… (GNRs) with their special optical and photothermal properties have attracted attention recently for their potential applications in fields such as photothermal therapy, drug delivery, biomedical imaging and chemical sensing. These anisotropic gold nanocrystals have tunable surface plasmonic …
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Using high pressure to study thermal transport and phonon scattering mechanisms
… for heat dissipation and moderation of thermal expansion, and the semiconductor industry faces a Joule heating barrier in devices with high power density. Be it for the nanocomposite frame of a satellite's solar panel array, or a miniaturized high-power RF circuit, these industries share …
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Functional materials for thermal regulation
Developing thermal management materials with greater functionality for the control of heat dissipation and regulation is a fundamental step to improve the performance in many engineering systems. This dissertation presents experimental studies of heat conduction in distinctive thermal functional …