نتایج جستجو برای: sapphire wafer

تعداد نتایج: 28205  

2008
C. E. Román-Velázquez Cecilia Noguez

We study the Casimir force between a nanoparticle and a substrate. We consider the interaction of metal nanoparticles with different substrates within the dipolar approximation. We study the force as a function of the distance for gold and potassium spheres, which are over a substrate of titanium dioxide, sapphire and a perfect conductor. We show that Casimir force is important in systems at th...

2004
P. Papakonstantinou R. Atkinson M. O'Neill

The effect of substrate temperature and oxygen pressure on the microstructure and magneto-optical (m-0) properties of Sr-ferrite films grown on (001) single crystal sapphire substrates by pulsed laser deposition has been investigated. The results demonstrated that smooth c-axis oriented films, could only be prepared at a narrow operational window of the useful oxygen pressure and at high substr...

2016
J. Clarke G. I. Hoffer P. L. Richards

2014 Two new types of superconducting infrared bolometer are described. In one, the temperature dependent Josephson current in an SNS junction is measured with a SQUID galvanometer. In the other, the temperature-dependent quasiparticle tunneling current in an SIN junction is measured with a conventional fet amplifier. Either type of junction is deposited on a low heat capacity sapphire substrat...

1997
Igor Vilfan Frédéric Lançon Jacques Villain

The structure of the ( √ 31 × √ 31)R ± 9 reconstructed phase on sapphire (0001) surface is investigated by means of a simulation based on the energy minimization. The interaction between Al adatoms is described with the semi-empirical manybody Sutton-Chen potential, corrected for the charge transfer between the metallic overlayer and the substrate. The interactions between the Al adatoms and sa...

Journal: :Journal of the Korean Society of Tribologists and Lubrication Engineers 2016

Journal: :journal of research in health sciences 0

background : collection and storage of roof rain water have been practiced for long time ago in iran and many other countries. water of cisterns is usually used as potable water. in golestan province many of rural torkman residents reservoir the most part of their potable water from roof rain in cisterns. in this province there are over 2600 cisterns. methods : to study the water quality, micro...

Journal: :Applied Physics Letters 2022

We demonstrate robust ferroelectricity in single-crystalline wurtzite phase N-polar ScAlN/GaN heterostructures grown on on-axis c-plane sapphire substrates by molecular beam epitaxy. The exactly aligned crystallographic orientation among the ScAlN, GaN, and substrate has been confirmed using x-ray diffraction measurements. nearly lattice-matched Sc0.21Al0.79N/GaN heterostructure shows a highly ...

Journal: :Crystals 2023

Hexagonal boron nitride (h-BN) is one promising material class for applications in DUV optoelectronics due to the layered structure and ultra-wide bandgap. The synthesis of h-BN with smooth surface morphology high quality on dielectric substrates key construct efficient functional devices thereon. In this study, we reported wafer-scale c-plane sapphire by metal organic chemical vapor deposition...

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