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 22 for “"thermochromic"”.
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Vanadium dioxide thermochromic thin films correlation between microstructure, electrical and optical properties
Thermochromic thin films of vanadium dioxide (VO2) were successfully prepared using two physical vapour deposition methods namely Pulsed Laser Deposition (PLD) and Inverted Cylindrical Magnetron Sputtering (ICMS). We used these two techniques in order to comparatively study the effect of deposition …
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Characterization of tetranuclear manganese complexes and thermochromic copper(II) and nickel(II) complexes
Two different projects are described. In the first, the magnetic and electronic properties of four tetranuclear manganese complexes that are potential models for the oxygen evolving complex of photosystem II are examined. The complexes, based upon x-ray crystallography are cubane like structures …
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Dynamic Crystallization and Stability Engineering in Hybrid Organic-Inorganic Perovskites: Towards Water-Stable and Thermochromic Materials
… Perovskites: Towards Water-Stable and Thermochromic Materials Jiyoon Kim ABSTRACT Hybrid organic-inorganic perovskites (HOIPs) have emerged as promising semiconductors for optoelectronic applications. But their intrinsic instability limits practical applications. This dissertation …
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Detailed Experimental Measurements of Heat Transfer Augmentation in Internal Channels Using a Thermochromic Liquid Crystal Technique
Design of internal cooling channels for gas turbine blade is critical to system performance. To achieve maximum efficiency, i.e. maximum cooling with minimum coolant usage, intensive research is required to optimize heat transfer enhancement features. The present study aims at experimental and …
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The effects of thermal history and degree of cross-polymerization on the thermochromic behavior of diacetylene-containing polyesters
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1994.
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Corpo de prova termocromático para verificar área de radiação eficaz em ultrassom fisioterapêutico
… radiation force balances. Test-objects made with thermochromic materials have been developed as a low cost option with the objective of verifying the quantitative relation between the heated area of thermochromic test-object and the ERA of ultrasound transducers applied to physiotherapy. The …
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Painting with Light: A practice-led exploration of contemporary painting and the illuminated frame
… of gallery lighting and to examine the usage of thermochromic pigments within contemporary painting. The following practice-led research offers a cumulative reading of contemporary theories and practices concerning the picture frame, painting, wall-based sculpture, light, the role of the …
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Synthesis of Chemically Stable VO2 Particles Using Green Solvents and their Application as Smart Coatings
… this energy is lost through windows. The use of thermochromic windows provides a new intriguing option, in which the window automatically regulates the amount of solar transmission in response to environmental temperature changes. Of the potential thermochromic materials, vanadium dioxide (VO2) …
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Experimental Investigation of Dimples as a Heat Transfer Enhancement Feature in Narrow Diverging and Converging Channels
… modeled wall inner surfaces were sprayed with thermochromic liquid crystals, and a transient test was used to obtain the local heat transfer coefficients from the measured color change. Analysis of results shows that dimples, in general, have very good enhancement capabilities and staggered …
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Parametric Study of Novel Passive Thermal Control Technology for Spacecraft
Thermochromic variable emissivity materials (VEMs) are a relatively new passive thermal control technology used for spacecraft radiators. VEMs passively change their emissivity based on their temperature, with VEMs having low emissivity at low temperatures and high emissivity at high temperatures. …
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Materials and strategies for flexible, stretchable and large area photonic devices
… is to design novel schemes for stretchable thermochromic liquid crystal sensors that have excellent mechanical property and are well-suited for high precision epidermal thermographic applications.
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Sartorial robotics
… Surface is a soft-architecture system utilizing thermochromic textiles and computer vision to facilitate human-machine teammate building. Zipperbot, a robotic continuous closure for fabric edge joining, was developed to explore autonomous control of a sartorial gesture and performed as a wearable …
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Integrated microfluidics, heaters, and electronic sensors for Lab-on-a-Chip applications
… heaters was successfully carried out using thermochromic crystals. Functionality of the heaters was shown and a rough calibration was obtained. The subsequent implementation of temperature measurement using fluorescent dyes, enabled real-time spatial temperature mapping. This method …
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Synthesis and characterization of high performance polytetrahydrofuran based polyurethane-urea and ionene elastomers
… physical properties. Photochromic as well as thermochromic phenomena were also noticed in these systems.
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Dynamic Materials and Devices for Controlling Solar Heat Gain in Buildings
… the opaque façade as well.</p> <p>To this end, thermochromic materials such as certain crystal phases of vanadium dioxide have been proposed for inclusion in opaque façade materials. In this paper we investigate the synthesis, integration, and performance of advanced materials for application in …
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Crystal engineering of dynamic metal organic frameworks for applications in chromic sensing and capturing of small molecules
… studies and by hot stage microscopy (HSM). Thermochromic and solvatochromic properties of the activated phases were investigated by spectroscopic techniques. Dynamic motion of the networks upon guest loss and absorption by activated phases were evaluated by single crystal X-ray diffraction …
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Liquid crystal thermography in neuropathic assessment of the diabetic foot.
… system comprises a robust measurement platform, thermochromic liquid crystal polyester sheet (TLC), instrumentation and analysis software. In vitro calibration was performed to characterise three physical forms of TLC on the basis of linearity, hysteresis, pressure sensitivity and response time. …
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Structural and functional characterization of nanoporous thin films through advanced scanning-transmission electron microscopies and optical spectroscopies
… in open air atmosphere, for the synthesis of thermochromic VO2 coatings of tunable metal-to-insulator response and controlled grain sizes and crystallinities.
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Heat Transfer in Stationary and Rotating Coolant Channels Using a Transient Liquid Crystal Technique
… a few thermocouples and a spray coating of thermochromic liquid crystals on the test surface. To validate the test rig and the experimental method, multipass coolant channels with rib turbulators, large diameter radially outward channels with rib turbulators, and jet impingement cooling …
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