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Showing 1 to 17 of 17 for “"thin metallic films"”.
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Pulsed-Laser-Induced Melting and Solidification of Thin Metallic Films
… induced melting and solidification of thin metallic films on SiO2. Two distinct topics were pursued: (1) microstructural manipulation and optimization of Cu films via SLS of as-deposited Cu films on SiO2, and (2) investigation of oriented heterogeneous nucleation via complete melting …
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Micomagnetic calculations of the magnetic properties of thin metallic films
… developed to simulate the magnetisation in a metallic thin film. This is achieved by energy minimisation techniques. The energy of each grain in the medium includes Zeeman, anisotropy, magnetostatic and exchange. The magnetostatic energy is incorporated by considering each grain as a point …
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Optical properties and surface activities of thin metallic films deposited in ultra high vacua
Copper and silver films of various thicknesses were deposited at a rapid rate, from four to twenty-five seconds, on glass substrates in ultra high vacua at pressures of 10⁻⁸ torr or lower. Their optical properties, reflectivity, transmissivity and absorptivity, were determined in vacua and in air …
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Changes of some optical constants of thin metallic films due to exposure to gases
… of freshly evaporated silver and copper films were measured in vacuo and then in the presence of several gases. These measurements were performed, using the photoelectric method, with two photomultiplier tubes (931-A and 1P21), and were made at an angle of incidence of zero degrees for …
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Coadsorption of anions and ultra-thin metal films on single crystal electrodes
… surface analysis of anions and ultra-thin metallic films of copper and silver deposited on single crystal electrodes. The anion and metal coverages from the Auger electron spectroscopy (AES) measurements were compared with results obtained by in situ radiochemical and electrochemical …
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Hydrogen Loading System Development and Evaluation of Tritiated Substrates to Optimize Performance in Tritium Based Betavoltaics
<p>State-of-the-art hydrogen loading system onto thin metallic films based on differential pressure in calibrated chambers has been developed for conditions pressures and temperatures up to 69 bar and 500°C, respectively. Experiments on hydrogen loading on to palladium films of thickness 50 and 250 …
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Electrostatic adhesion testing of metallizations on silicon substrates
… forces to generate delaminating stresses in thin metallic films. The interfacial adhesion strength is readily calculated from the electrode geometry and the applied electrostatic field at failure. Unlike other adhesion tests, this technique does not require any mechanical contact and is …
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Design fabrication and calibration of MEMS actuators for in-situ materials testing
Many MEMS devices utilize thin metallic films as mechanical structures. The elastic and plastic properties of these thin films (thickness < 1μm) are significantly different from those of the bulk material. At these scales the volume fraction of material defects such as: grain boundaries, …
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Novel electromagnetic scattering phenomena
… theoretically propose two schemes featured by thin metallic films and hybrid plasmonic dielectric nanoresonantors, respectively, aiming at achieving high radiative efficiency in plasmonics. Second, treating free electrons as a near-field scattering excitation, we derive a universal upper limit …
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Angle-resolved photoemission studies of two-dimensional electron systems
… of 2D electron systems, including ultrathin metallic films grown on semiconductor substrates and graphite/graphene layers. Both systems are (quasi) two-dimensional and are of particular interest due to their technological importance. The major experimental tool is angle-resolved …
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Photoemission studies of noble metal semiconductor systems
… properties of semiconductor surfaces and of thin metallic films deposited upon them is a topic of fundamental and practical interest. Clean and Au and Ag covered surfaces of Ge(lll)-c(Zx8), Si(lll)-(7x7), Ge(lOO)-(Zxl), and Si(lOO)-(Zxl) are studied in this work with high-resolution …
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Size dependence of mechanical responses of materials in small-volume structures
… of materials in small-volume structures, such as thin films and patterned lines on substrates, is examined. The understanding of stress evolution and deformation behavior of those materials is one of major factors in the fabrication, performance, and reliability of microelectronic devices. The …
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Characterization of the mechanical properties of freestanding platinum thin films
Many MEMS devices utilize nanocrystalline thin metallic films as mechanical structures, in particular, micro switching devices where these films are used as Ohmic contacts. But the elastic and plastic properties of these thin films (thickness < 1μm) are significantly different from those of the …
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A study of carbon based materials for energy applications
… devices. An excimer laser was used to transform thin metallic films into nanoparticles which could play the role of the catalyst in proton exchange membrane fuel cells. In this study experiments have been conducted into a single step process to convert the poly ethylene naphthalate (PEN) surface …
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Excitation, Interaction, and Scattering of Localized and Propagating Surface Polaritons
… to be accounted for in modern nanotechnology. Within this thesis, certain basic phenomena involving surface polaritons are investigated by means of the semianalytical multiple-multipole (MMP) method. The results are compared to experiments. In the first part, the surface plasmon resonance (SPR) …