Materials Literature
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Samples of as-extruded ZK60 magnesium alloy were subjected to 6 passes of equal-channel angular pressing (ECAP) following route A. The processing temperature was decreased with the number of passes. The structural evolution of the deformed samples was analyzed using Electron Backscattered Diffraction (EBSD) and X-Ray…
Graphene stickers are prepared by simple detaching the spin-coated polymer together with graphene directly grown on Al2O3 substrates. Nonlinear operation of the stickers is verified by realizing the saturable absorbers for laser short pulse formation.
This paperpresents theexperimentalresults ofthe compressive strength ofconcretebased onthe order ofmixingandmixingturnover timeconstituentmaterialsof concretewithmortarusingmolenmachine. SpecimensmadecylindricalwithsizeO15cmheight30cm. Aims to determinethe extent ofthe effectofthe orderandstirringturnaroundtimewhenm…
Abstract—The solid state reaction method followed by the ball milling technique was used to synthesize the nano sized La0.72Sr0.28MnO3 (LSMO) perovskite samples with different grain
Protocellular boundaries were inextricably connected to the metabolism they encapsulated: to be inheritable, early metabolism must have led to an increased rate of growth and division of vesicles and, similarly, transport through vesicle boundaries must have supported the evolution of metabolism. Even though explainin…
International audience
International audience
Our works on the Yb3+, Er3+/Yb3+ doped phosphate glass fiber, and Tm3+ doped germinate glass fiber, as well as the laser sources developed with this active fibers at 1.0, 1.5 and 2.0 m were reviewed.
The measurement of Seebeck coefficient and electrical resistivity are critical to the investigation of all thermoelectric systems. Therefore, it stands that the measurement uncertainty must be well understood to report ZT values which are accurate and trustworthy. A detailed uncertainty analysis of the ZEM-3 measureme…
International audience
We present a new approach to fabricate luminescent solar concentrators based on commercial plastic optical fibers coated with an Eu3+-doped organic-inorganic hybrid layer, displaying an optical conversion efficiency up to 7%.
We optimized circular Bragg grating reflectors to achieve high reflection (>0.95) over a wide bandwidth (339nm, reflectance higher than 0.8) for TE mode and to reduce footprint just to 10.96 mum2.
Chalcogenide glasses have amongst the highest third order nonlinearity of any amorphous material, negligible nonlinear absorption and excellent mid infrared transparency. This talk summarizes recent progress on nonlinear devices based on chalcogenide glass waveguides.
β‐Cyclodextrin (βCD) microgels were prepared water in oil emulsion, and cinnamic acid (CA) was loaded in the microgel by inclusion complexation. The specific loading of CA in the microgel was 0.0203 mg/mg, and it was less than that the calculated specific loading (0.0368 mg/mg). The maximum swelling ratio of CA‐loaded…
We fabricated a high-efficiency infrared light emitting diode (LED) via dressed-photon-phonon (DPP) assisted annealing of a p-n homojunctioned bulk Si crystal. The center wavelength in the electroluminescence (EL) spectrum of this LED was determined by the wavelength of a CW laser used in the DPP-assisted annealing. W…
The waveguide lasers fabricated in Yb-doped phosphate and silicate using femtosecond laser direct-write technique were compared. The output power and threshold was similar. However, the differential mechanism of refractive index change can influence their performance over time.
Aluminium-doped zinc oxide (ZnO:Al) grown by expanding thermal plasma chemical vapour deposition (ETP-CVD) has demonstrated excellent electrical and optical properties, which make it an attractive candidate as a transparent conductive oxide for photovoltaic applications. However, when depositing ZnO:Al on CIGS solar c…
An activated RDX-Fe2O3 xerogel in a Si-microchannel plate (MCP) has been successfully prepared by a novel propylene epoxide-mediated sol-gel method. A decrease of nearly 40 °C in decomposition temperature has been observed compared with the original cyclotrimethylene trinitramine (RDX). The RDX-Fe2O3 xerogel can relea…
Novel linear-dendritic amphiphilic block copolymers with hydrophilic poly(ethylene glycol) (PEG) block and hydrophobic Percec-type dendrons containing ferrocenyl terminals were synthesized by the esterification reaction of poly(ethylene glycol) methyl ether with ferrocenyl-terminated alkyl-substituted benzoic acid den…
This Habilitation Thesis written in 2013 reviews my research work on spin torque nano-oscillators (from zero-field oscillations, to synchronization and vortex oscillators) and memristive devices (spin Torque and ferroelectric memristors).