Papers by Nouredine Oueldna
Journal of Energy Storage
Journal of Energy Storage
Journal of Materials Science: Materials in Electronics
Journal of Materials Processing Technology, 2008
Wool fabric was treated by corona discharge and treating conditions were optimized. The surface p... more Wool fabric was treated by corona discharge and treating conditions were optimized. The surface properties of the treated wool fabrics, such as hydrophilicity and dyeability with natural dyes, have been investigated. After the corona discharge treatment, the hydrophilicity of the wool fabric was improved and the dyeability with Rhizoma coptidis was increased. Scanning electron microscope (SEM) images indicated that some epicuticle scales on the wool surface became loose. The X-ray photoelectron spectroscopic (XPS) analyses show the oxygen contents of the wool surface were increased and sulphur contents decreased after treatment.
The European Physical Journal Applied Physics
α-MgAgSb is a tellurium-free thermoelectric material that exhibits good thermoelectric properties... more α-MgAgSb is a tellurium-free thermoelectric material that exhibits good thermoelectric properties near room temperature. Being made of relatively abundant elements compatible with the complementary metal oxide semiconductor (CMOS) technology, it is considered as a possible solution for the development of high-efficiency thermoelectric devices for heat waste harvesting in microelectronic setups. This study presents a first attempt to investigate the structural properties of MgAgSb thin films prepared by solid-state reactive diffusion. X-ray diffraction (XRD) was used to follow phase formation in thin films, first, in the case of the binary Ag3Sb and Mg3Sb2 compounds, and then, in the case of the ternary system Mg-Ag-Sb. For the later, in situ XRD was used to follow real-time phase formations during the reaction of the bilayerAg3Sb/Mg3Sb2. The results show that the phase α-MgAgSb can be produced by reactive diffusion at the interface of the bilayer. Furthermore, the three phases α, β,...
Materialia, 2020
The Seebeck coefficients () and the power factors of 100 nm-thick Ge 1-x Sn x films grown by magn... more The Seebeck coefficients () and the power factors of 100 nm-thick Ge 1-x Sn x films grown by magnetron sputtering were studied versus Sn composition (0.09 ≤ x ≤ 0.15) in the 220 − 330 K temperature range. The films present particularly high Seebeck coefficients at room temperature but as they are undoped, their power factors are too low for room temperature thermoelectric applications due to low electrical conductivity (). Nevertheless, as it is possibile to modify both and by adjusting x, as well as employ conventional doping techniques, the IV-IV Ge 1-x Sn x semiconductor is shown to be extremely interesting for complementary-metal-oxide-semiconductorcompatible thermoelectric applications.
Journal of Alloys and Compounds
Nanomaterials, Jul 30, 2022
Journal of Alloys and Compounds
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Papers by Nouredine Oueldna