Tunneliliitosten ominaisuuksien parantaminen lämpökäsittelyllä
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Co-precipitation of Mg-doped Ni0.8Co0.1Mn0.1(OH)2 : effect of magnesium doping and washing on the battery cell performance
Laine, Petteri; Hietaniemi, Marianna; Välikangas, Juho; Kauppinen, Toni; Tynjälä, Pekka; Hu, Tao; Wang, Shubo; Singh, Harishchandra; Lassi, Ulla (Royal Society of Chemistry, 2023)Co-precipitation of Ni0.8Co0.1Mn0.1(OH)2 (NCM811) and Mg-doped (0.25 wt% and 0.5 wt%) NCM811 precursors is carried out from concentrated metal sulphate solutions. In this paper, the aim is to study the role of magnesium ... -
Ytterbium-doped fibers for high-power fiber lasers
Dutta, Arpan (American Institute of Physics, 2021)Ytterbium (Yb) doped optical fibers are widely used in high-power applications and ultrafast lasing since they show adequate power-handling capability and provide desirable beam quality. Yb-doped fibers with large core ... -
Synergistic effects of low-level magnesium and chromium doping on the electrochemical performance of LiNiO2 cathodes
Laine, Petteri; Välikangas, Juho; Kauppinen, Toni; Hu, Tao; Wang, Shubo; King, Graham; Singh, Harishchandra; Tynjälä, Pekka; Lassi, Ulla (Springer, 2024)LiNiO2 cathode materials with magnesium and chromium doping were prepared using a simple low - cost and efficient co - precipitation and lithiation procedure. During this procedure, both magnesium and chromium form a ... -
Tailoring Vacancy Defects in Isolated Atomically Precise Silver Clusters through Mercury-Doped Intermediates
Chakraborty, Papri; Malola, Sami; Weis, Patrick; Neumaier, Marco; Karsten Schneider, Erik; Häkkinen, Hannu; Kappes, Manfred M. (American Chemical Society (ACS), 2023)Vacancy defects are known to have significant effects on the physical and chemical properties of nanomaterials. However, the formation and structural dynamics of vacancy defects in atomically precise coinage metal clusters ... -
Modeling optical constants from the absorption of organic thin films using a modified Lorentz oscillator model
Dutta, Arpan; Tiainen, Ville; Qureshi, Hassan Ali; Duarte, Luís; Toppari, J. Jussi (Optica Publishing Group, 2022)Optical constants of organic thin films can be evaluated using the Lorentz oscillator model (LOM) which fails to fit inhomogeneously broadened absorption of highly concentrated molecular films. In modified LOM (MLOM), the ...
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