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Electrochemical effects of ALD surface modification on combustion synthesized LiNi1/3Mn1/3Co1/3O2 as a layered-cathode material

“…4. Similar to XRD, alumina is assumed to be inactive for Raman and IR at low wavenumbers [18,19]. We assume that the structure of Li(Ni 1/3 Mn 1/3 Co 1/3 )O 2 is layered with a space group of R-3m, similar to that of LiCoO 2 .…”

Structure and photoluminescence properties of strong blue-emitting alumina film developed from a liquid sol at low temperature

“…When the samples were annealed above 200 • C for 1 h, the peaks corresponding to the bayerite phase in the XRD patterns disappeared, and only peaks corresponding to pseudo-boehmite remained. When the samples were annealed at 400 • C for 1 h, ␥-alumina started to develop from the alumina nanoparticles [13]. As the annealing temperature was raised above 400 • C, the phase of the alumina nanoparticles gradually transformed from ␥-alumina to -alumina.…”

“…Yoldas et al reported the structural transition from boehmite to ␥-alumina, where five coordinated aluminum atoms are created, and showed that the photoluminescence (PL) of the resultant ␥-alumina film has a strong relationship with these five coordinated aluminum atoms [12]. Additionally, Suga and co-workers observed that the oxygen deficiency in the aluminum hydroxide used to fabricate alumina films is closely related to the formation of the five coordinated aluminum atoms [13]. Therefore, the structural transition and inner defects of alumina materials are usually important factors for photoluminescence emission.…”

Reactive Conversion of Bioclastic Nanostructures

“…3b are also consistent with this spinel-like polymorph), although some residual magnesia was also retained. The formation of y-A1 2 0 3 has often been observed to form in advance of the thermodynamically stable o-A1 2 0 3 (corundum) phase [5,6]. The electron micrograph shows that the nanocrystalline ,y-alumina-bearing frustules retained the overall cylinder shape of the starting magnesia frustules.…”