Concept
Sapphire
Related publications (112)
Calcium phosphate formation on titanium-based surfaces: bioactivity evaluated by in vitro methods
The prediction of implant behaviors in vivo by the use of easy-to-perform in vitro methods is of great interest in biomaterials research. In the field of bone implants, it is commonly accepted that a spontaneous formation of a hydroxyapatite (HA) layer on ...
EPFL2018Effect of the relative shift between the electron density and temperature pedestal position on the pedestal stability in JET-ILW and comparison with JET-C
Olivier Sauter, Ambrogio Fasoli, Basil Duval, Stefano Coda, Jonathan Graves, Yves Martin, Duccio Testa, Patrick Blanchard, Alessandro Pau, Cristian Sommariva, Henri Weisen, Richard Pitts, Yann Camenen, Jan Horacek, Javier García Hernández, Marco Wischmeier, Nicola Vianello, Mikhail Maslov, Federico Nespoli, Yao Zhou, David Pfefferlé, Davide Galassi, Antonio José Pereira de Figueiredo, Jonathan Marc Philippe Faustin, Liang Yao, Dalziel Joseph Wilson, Hamish William Patten, Samuel Lanthaler, Bernhard Sieglin, Otto Asunta
The electron temperature and density pedestals tend to vary in their relative radial positions, as observed in DIII-D (Beurskens et al 2011 Phys. Plasmas 18 056120) and ASDEX Upgrade (Dunne et al 2017 Plasma Phys. Control. Fusion 59 14017). This so-called ...
IOP PUBLISHING LTD2018Parametric Experimental Study and Design of Experiment Modelling of Sapphire Grinding
This study investigates and models the grinding process of single crystal sapphire. Five parameters: the wheel speed, the feed speed, the vertical feed, the ultrasonic assistance and the crystallographic direction were considered via a design of experiment ...
Elsevier2017High Throughput Characterization of Epitaxially Grown Single-Layer MoS2
The growth of single-layer MoS2 with chemical vapor deposition is an established method that can produce large-area and high quality samples. In this article, we investigate the geometrical and optical properties of hundreds of individual single-layer MoS2 ...
Mdpi Ag2017Strain engineering a 4a x root 3a charge-density-wave phase in transition-metal dichalcogenide 1T-VSe2
We report a rectangular charge density wave (CDW) phase in strained 1T-VSe2 thin films synthesized by molecular beam epitaxy on c-sapphire substrates. The observed CDW structure exhibits an unconventional rectangular 4a x root 3a periodicity, as opposed to ...
Amer Physical Soc2017Suppressing Nucleation in Metal–Organic Chemical Vapor Deposition of MoS2
Andras Kis, Dmitry Ovchinnikov, Dmitrii Unuchek, Hokwon Kim, Davide Deiana
Toward the large-area deposition of MoS2 layers, we employ metal–organic precursors of Mo and S for a facile and reproducible van der Waals epitaxy on c-plane sapphire. Exposing c-sapphire substrates to alkali metal halide salts such as KI or NaCl together ...
American Chemical Society2017Comparison of apparent activation energies for densification of alumina powders by pulsed electric current sintering (spark plasma sintering) and conventional sintering-toward applications for transparent polycrystalline alumina
Paul Bowen, Michael Stuer, Zhe Zhao, Claude Paul Carry
In the quest for high real in-line transmittances for transparent polycrystalline alumina (PCA), we need defect free processing. One of the biggest advances in producing high density defect free ceramics over recent years has been the advent of spark plasm ...
Materials Research Society2017Nearly perfect GaN crystal via pit-assisted growth by HVPE
We demonstrated 5 mm-thick bulk gallium nitride (GaN) with nearly perfect crystal quality. To achieve this, intentional etch pit formation by in situ dry HCl etching and ex situ wet etching in H3PO4 solution was employed on freestanding GaN templates follo ...
Royal Soc Chemistry2017Hybrid BAW/SAW AlN and AlScN Thin Film Resonator First Experimental data
Paul Muralt, Ramin Matloub Aghdam, Vladimir Pashchenko, Sylvain Ballandras
A novel type of hybrid resonator based on BAW transformation into SAW in a ridged layered structure was fabricated and characterized. Bulk waves are excited by micromachined piezoelectric AlScN pillars located on the non-piezoelectric Si and sapphire subst ...
Ieee2016Multi-mJ infrared femtosecond hydrogen Raman laser
Christoph Peter Hauri, Mostafa Shalaby
High-energy pulses at 1.28 mu m are demonstrated by stimulated Raman scattering in hydrogen using two chirped pulses of a Ti: Sapphire laser. The Stokes pulse carrying record-high energy of 4.4 mJ is recompressed to 80 fs. ...
Ieee2016