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 20 of 28 for “"TDTR"”.
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Mapping the thermal conductivity of SiC/SiC composites
… the uses of time-domain thermoreflectance (TDTR) to map the thermal conductivity of SiC/SiC composites that are being considered for use as replacement materials in current light-water reactors (LWR), and also as materials for use in next generation nuclear reactors. The thermonuclear …
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Nature and Dynamics of Earth and Planetary Cores From High-Pressure Properties of Iron -Rich Alloys
… I employed the time-domain thermoreflectance (TDTR) method combining with the diamond anvil cell technique (Chapter 5). I report high-pressure thermal conductivity data of water and ice phases up to 11 GPa and at 300 K. The thermal conductivity of Ice VII increases by more than a factor of …
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Heat transport by phonons in crystalline materials and nanostructures
… dissertation are time-domain thermoreflectance (TDTR) for measurements of thermal conductivity of nanostructures and thermal conductance of interfaces; and frequency-domain thermoreflectance (FDTR), which I developed as a direct probe of the mean-free-paths of dominant heat-carrying phonons in …
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Heat Transport across Dissimilar Materials
… interfaces. A time-domain thermoreflectance (TDTR) system is used to measure the thermal properties at the nanoscale. TDTR is an optical pump-probe technique, and it is capable of measuring thermal conductivity, k, and interface thermal conductance, G, simultaneously. The first study examines …
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Testing theories for thermal transport using high pressure
… method, time-domain thermoreflectance (TDTR), combined with gem anvil cell techniques. I demonstrated that pressure tuning of physical properties of materials is an elegant approach to test the validity of theories for thermal transport. Pressure dependence of the cross-plane thermal …
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Autonomic thermal switch based on phase transition alloys
… and Time-domain Thermo-reflectance (TDTR) measurement. We have achieved large area of ordered lamellar structure up to hundreds of micron meters using Cu-P eutectic alloy. We include a few modern techniques to study the composition of both materials, which could be applied to other …
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Using high pressure to study thermal transport and phonon scattering mechanisms
… coupled with time-domain thermoreflectance (TDTR). TDTR is a precise optical method well-suited to measuring thermal conductivities and conductances at the nanoscale and across interfaces. The DAC-TDTR method yields thermal property data as a function of pressure, rather than temperature. …
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Immunotherapy for murine glioma
… vvDD-IL15Ra-YFP vaccinia virus or vMyx-IL15Ra-tdTr combined with other treatments, including vaccination with GARC-1 peptide (a neoantigen for GL261), rapamycin, celecoxib, and adoptive T cell therapy. We found that vvDD-IL15Ra-YFP and vMyx-IL15Ra-tdTr each infected and killed GL261 cells in …
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High-Throughput Measurements of Thermal Conductivity and the Coefficient of Thermal Expansion
TDTR and TD-PBD are used to study the local properties near the dentin-enamel junction (DEJ) in a human tooth. The thermal conductivity and Young's modulus are uniform in dentin and enamel, respectively, and change abruptly across the dentin-enamel interface. The CTE changes gradually in dentin …
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Enhancing efficacy of oncolytic myxoma virus and adoptive T cell therapy against tumors
… a new recombinant myxoma virus (vMyx-IL15Rα-tdTr), which expresses an IL15Rα-IL15 fusion protein as well as tdTomato red fluorescent reporter protein, and the antitumor effect of the virus. Interleukin-15 (IL15) is an immunomodulatory cytokine with significant potential for stimulating …
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Thermal transport in two-dimensional materials and magnetic multilayers
… axes, I use time-domain thermoreflectance (TDTR) of conventional geometry, where pump and probe beams are co-aligned, and TDTR of beam-offset geometry, where pump and probe beams on sample surface are spatially separated. The beam-offset TDTR allows to measure in-plane thermal conductivity …
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MEMS Technologies for Energy Harvesting and Sensing
… technique, Time Domain Thermoreflectance (TDTR) in the study of Pb(Zr,Ti)O3 (PZT) thin film texturing. Time Domain Thermoreflectance (TDTR) has been proved to be capable of measuring thermal properties of atomic layers and interfaces. Therefore, we utilized TDTR to analyze and model the …
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Nanoscale Thermal Transport at Graphene-Soft Material Interfaces
… in time domain thermalreflectance (TDTR) measurements was investigated, and the results showed that the interfacial thermal conductance measured in typical TDTR tests is that of the across mode for thin-layered materials.
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Observation and manipulation of the wave nature of phonon thermal transport through superlattices
… techniques, time-domain thermoreflectance (TDTR) for cross-plane measurements, and transient thermal grating (TTG) for in-plane measurements. The results of this study lend insight into the role of interface scattering, previously understood to be the dominant scattering mechanism in these …
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Ultra low thermal conductivity in layered disordered crystalline materials
… measured using Time-Domain Thermo Reflectance (TDTR) method; elastic properties were investigated using picosecond acoustics. The results are applied to reducing the thermal conductivity in misfit layer materials and multilayers containing disordered layered crystalline materials. The …
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Termoelektriset nanokomposiitit
… Termoelektrisiä ominaisuuksia tutkittiin TDTR-menetelmällä ja Seebeckin kertoimia mittaamalla. Kerrospaksuuksia säätelemällä pystyttiin kasvattamaan sekä nanolaminaatteja että nanodispersioita. Pienemmillä kerrospaksuuksilla kalvot olivat dispersiomaisia ja suuremmilla kerrospaksuuksilla …
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Studying phonon mean free paths at the nanoscale : modeling and experiments
… conjunction with time-domain thermoreflectance (TDTR) pump-and-probe measurement setup. Consistent algorithm based on solution from the phonon Boltzmann transport equation (BTE) is also developed to approximately extract the thermal conductivity accumulation functions in materials studied. The …
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Variational approach to solving the phonon Boltzmann transport equation for analyzing nanoscale thermal transport experiments
… grating (TTG) and time-domain thermoreflectance (TDTR). We provide an efficient and general methodology to solving the BTE and gaining insight into the reduction of the effective thermal conductivity in the nondiffusive regime, known as classical size effects. We also extend the reconstruction …
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Chemistry and Measurement at Aqueous Nanoscale Interfaces
… properties by time-domain thermal reflectance (TDTR) which was not previously possible for polyamide membranes due to complications arising from the polysulfone support. Free-standing polyamide active layers were synthesized via interfacial polymerization of m-phenylenediamine (MPD) and …
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Thermal conductivity of UO2 and U3O8 epitaxial layers damaged by ion irradiation
… technique – time-domain thermoreflectance (TDTR) – and a heat transport model the thermal conductivity of the sample under study can be determined. For UO2, the thermal conductivity is found to be 10.2 W/m.K at 323 K and with increasing temperatures its behavior is inversely proportional to …
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