The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform

Neil M. White - One of the best experts on this subject based on the ideXlab platform.

  • effects of the binder Material on the mechanical properties of thick Film magnetostrictive Materials
    Sensors and Actuators A-physical, 2004
    Co-Authors: Neil Grabham, S P Beeby, Neil M. White
    Abstract:

    This paper presents research carried out at the University of Southampton into the development of a magnetostrictive thick-Film Material suitable for use with silicon micromachined devices. This form of magnetostrictive Material has previously been deposited onto alumina substrates and this paper reports further work on migrating the technology onto silicon. The evaluation of two alternative glass frits for use as the binder within the thick Film is reported. The correct choice of the binder Material is important in a thick-Film Material because it is responsible for binding the active Material within the thick Film into a composite Material and also adhering the Film to the substrate. A series of tests have been applied to samples fabricated using various glass frits to assess their mechanical properties and suitability for the micro-actuator applications.

  • Development of a Magnetostrictive Thick-Film Material for MEMS Devices
    2002
    Co-Authors: Neil Grabham, Steve Beeby, Neil M. White
    Abstract:

    This paper presents research being carried out at the University of Southampton into the development of a magnetostrictive thick-Film Material, intended for use as an actuator with MEMS devices. This magnetostrictive thick-Film Material has been deposited onot alumina substrates, and this paper presents work on migrating the technology onto silicon and the evaluation of the resulting magnetostrictive thick-Films.

  • Development of a Magnetostrictive Thick-Film Material for MEMS Applications
    2001
    Co-Authors: Neil Grabham, Neil M. White
    Abstract:

    This paper describes the fabrication of a magnetostrictive thick-Film Material based upon the giant magnetostrictive Material Terfenol-D. A system to measure the magnetostriction of the resulting thick-Film is also described. Using this system the effects of adding an inert filler Material to reduce voids in the Film are investigated. The advanatages of adding the filler Material to the magnetostrictive paste are also reported.

Lanxi Wang - One of the best experts on this subject based on the ideXlab platform.

  • thermochromic property of la0 8sr0 2mno3 thin Film Material sputtered on quartz glass
    Journal of Alloys and Compounds, 2010
    Co-Authors: Chunhua Wu, Jie Bing Wang, Min Xu, Lanxi Wang
    Abstract:

    Abstract La 0.8 Sr 0.2 MnO 3 (LSMO) thin Films have been grown on quartz glass at room temperature by sputtering LSMO compound and followed by post-annealing. Crystalline structure, infrared reflectance spectrum and temperature dependent of infrared emittance were investigated. The result indicates that there exists a significant transition in thermal emittance over the temperature range between 170 K and room temperature, which could potentially be explored for smart spacecraft thermal radiator application.

Ia Lawrence - One of the best experts on this subject based on the ideXlab platform.

  • effect of hydration on silk Film Material properties
    Macromolecular Bioscience, 2010
    Co-Authors: Scott E. Wharram, Jonathan A. Kluge, Gary G. Leisk, Ia Lawrence, Fiorenzo G Omenetto, Mark I Rosenbla, David L Kapla
    Abstract:

    Effects of hydration on silk fibroin Film Material properties were investigated for water-annealed and MeOH treated samples. After hydration, thickness increased 60% for MeOH immersed Films, while water-annealed samples remained constant. TGA determined MeOH immersed Films had an 80% mass loss due to water, while water-annealed had a 40% mass loss. O2 permeability was greater in MeOH immersed Films with Dk values of 10 (10 −11 ·mLO2·cm)/(cm·s·mmHg), while water-annealed Films had Dk values of 2 (10 −11 ·mLO2·cm)/(cm·s·mmHg). All Films showed a decrease in Young’s modulus and increased plastic deformation by two orders of magnitude when submerged in saline solution. FTIR revealed water-annealed Films increased in β-sheet content with increasing water vapor, while MeOH immersed Films did not change.

Kumar Appaiah - One of the best experts on this subject based on the ideXlab platform.

  • Tunable wettability and prediction of total surface energy for nanocoatings: An empirical model
    Surface & Coatings Technology, 2020
    Co-Authors: Ankitha E. Bangera, Kumar Appaiah
    Abstract:

    Abstract For thin Film coated solids, surface energy (SE) and thus, the surface wettability is influenced by the thickness of Film coatings. Tuning the thickness of the Film and the surface parameters are important to maintain the stability, passivation, and anti-aging properties of surfaces. Further, to determine the surface properties such as the SE and wettability for nanocoatings, it is necessary to relate the various factors that could affect the surface experimentally. We have studied how the wetting behavior varies with the thickness of the Film, substrate Material, and rate of deposition or process parameters. These effects were practically demonstrated and verified by sputtering titanium thin Films at different rates of deposition on silicon and quartz substrates. From the experiments, we observed that the SE for nanocoatings varies with Film thickness, rate of Film deposition, and the underlying substrate. Based on these observations, we have proposed a generalized empirical model to determine the total SEs for nanocoatings using basic Material constants such as lattice constants, bulk moduli and Poisson's ratios of the substrate and thin Film Material, SEs of the substrate and deposited bulk Film Material. Our model considers the major factors contributing to the Film thickness-induced self-cleaning behavior of nanocoatings.

David Levy - One of the best experts on this subject based on the ideXlab platform.

  • novel reversible humidity responsive light transmission hybrid thin Film Material based on a dispersive porous structure with embedded hygroscopic and deliquescent substances
    Advanced Functional Materials, 2018
    Co-Authors: Erick Castellon, Marcos Zayat, David Levy
    Abstract:

    The article describes a new concept of an optical hybrid thin-Film Material that exhibits reversible humidity-driven light transmittance (scattering) properties. The Film consists of a dispersive porous structure, with embedded hygroscopic and deliquescent compounds, that is able to scavenge water molecules from humid air to fill up the pores and become transparent to the incident light. Upon exposure to dry air, water is released from the structure and the Material recovers its original light scattering properties. The developed thin Films can change their transparency when exposed to air with different relative humidity (RH), adjusting the light throughput. This Material can, therefore, be used to design new optical switching systems, having the advantage that they do not require liquid crystal, transparent conductive glass substrates, or complex layer-by-layer architectures for operation. In this work, a thin Film was prepared by the sol–gel technique using calcium chloride as deliquescent substance embedded in a hybrid silica–titania matrix. At dry air, the thin Films show a highly dispersive state, with a light transmittance T = 0.06, while at 51% RH the Film exhibits a transparent state with a transmittance T =0.67 (measured at 633 nm).