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Single crystal
About: Single crystal is a research topic. Over the lifetime, 59617 publications have been published within this topic receiving 870828 citations.
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TL;DR: A sulfonated indium (In) metal organic framework (MOF) is reported with an anionic layered structure incorporating hydrogen-bonded dimethylammonium cations and water molecules, revealing a very high proton conduction value for low humidity and moderate temperature.
Abstract: A sulfonated indium (In) metal organic framework (MOF) is reported with an anionic layered structure incorporating hydrogen-bonded dimethylammonium cations and water molecules The MOF becomes amorphous in >60% relative humidity; however, impedance analysis of pelletized powders revealed a proton conduction value of over 10–3 S cm–1 at 25 °C and 40% RH, a very high proton conduction value for low humidity and moderate temperature Given the modest humidity stability of the MOF, triaxial impedance analyses on a single crystal was performed and confirmed bulk proton conductivity over 10–3 S cm–1 along two axes corroborating the data from the pellet
123 citations
TL;DR: In this paper, it is shown that the epitaxial film grown on CoO(100) at 625 K and 5×10−7 Torr is Co3O4-like in both oxygen content and XP/HREEL spectroscopic characteristics.
Abstract: Under mildly oxidizing ultrahigh vacuum conditions, it is possible to form on top of CoO(100) single crystal substrates, thin films that have higher oxygen content but that preserve the overall symmetry of the CoO(100) low‐energy electron diffraction pattern. X‐ray photoelectron spectroscopy (XPS) and high‐resolution electron‐energy‐loss spectroscopy (HREELS) data indicate that the epitaxial film grown on CoO(100) at 625 K and 5×10−7 Torr is Co3O4‐like in both oxygen content and XP/HREEL spectroscopic characteristics. Both materials are closest packed in lattice oxygen, with the mismatch of bulk O2−–O2− distances of approximately 5%. However, the Co3O4 is only able to grow to a thickness of approximately 5 A before the oxidation process halts. It is proposed that the orientation of Co3O4 that forms most readily on the CoO(100) surface does not present a thermodynamically stable orientation of the bulk Co3O4 substrate but is that which grows under the constraint of the best CoO(100)/Co3O4 epitaxial arrange...
123 citations
TL;DR: In this article, the reactivity of the edge planes of MoS2 has been studied on single crystals and it has been shown that Co incorporated at low levels into single crystals tends to surface segregate at MoS 2 edge planes.
123 citations
TL;DR: The structure of a single crystal of dehydrated zeolite Na−X selected from a batch grown by Petranovskii in Russia, of composition Na92Si100Al92O384 per unit cell, was determined by X-ray diffraction methods in the cubic space group Fd3; a = 25.077(4) A at 21 °C; wR2 based on F2 and all data is 0.140.
Abstract: The structure of a single crystal of dehydrated zeolite Na−X selected from a batch grown by Petranovskii in Russia, of composition Na92Si100Al92O384 per unit cell, was determined by X-ray diffraction methods in the cubic space group Fd3; a = 25.077(4) A at 21 °C. R1 = 0.054 for the 320 reflections for which Fo > 4σ(Fo); wR2 based on F2 and all data is 0.140. Na+ ions are found at four crystallographic sites. Sites I‘ and II are fully occupied with 32 Na+ ions each. The remaining 28 Na+ ions partially occupy two 12-ring (site III‘) positions with 10(4) near an O−Al−O sequence and 18(4) near an O−Si−O sequence. These results differ from those of the two previous investigations of dehydrated Na−X, which, in turn, disagree substantially with each other. The near energy equivalence of two (or more) III‘ sites, the presence of an impurity cation in one determination, and a consideration of the differing qualities of the diffraction data are sufficient to reconcile all results. The substitution of four silicon ...
123 citations
TL;DR: In this article, the origin of the stabilization of close packed structures with periodic stacking order in relation to the specific shape of the Fermi surface is investigated, and the application of electron microscopes to a systematic analysis of crystallographic structures is thus explored and a systematic method of identifying close-packed structures and their relations is then established.
123 citations