Mechanism of Pyrroloquinoline Quinone-Dependent Hydride Transfer Chemistry from Spectroscopic and High-Resolution X-ray Structural Studies of the Methanol Dehydrogenase from Methylococcus capsulatus (Bath)

Layered nanoheterostructures Fe | MgO | Cr | MgO | Fe is an artificial ferromagnetic material in which the exchange interaction of the magnetic moments of Fe layers through intermediate dielectric and metal layers can lead to magnetic configurations that are not realized in the well-studied Fe | MgO | Fe and Fe | Cr | Fe. In this work, we investigated the correlations of the structural and magnetic properties of layered nanoheterostructures Fe (10 nm) | MgO (1.5 nm) | Cr (t nm) | MgO (1.5 nm) | Fe (7 nm) (thickness t = 0.9 and 1.8 nm). Structural studies performed using X-ray diffractometry and high-resolution reflectometry confirmed the formation of a textured structure and revealed its well-defined layered character with sharp interlayer boundaries.

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Structural studies of high-area zeolitic adsorbents and catalysts by a combination of high-resolution X-ray powder diffraction and X-ray absorption spectroscopy

Faraday Discussions of the Chemical Society ◽

10.1039/dc9908900119 ◽

1990 ◽

Vol 89 ◽

pp. 119 ◽

Cited By ~ 41

Author(s):

Eric Dooryhee ◽

G. Neville Greaves ◽

Andrew T. Steel ◽

Rodney P. Townsend ◽

Stuart W. Carr ◽

...

Keyword(s):

High Resolution ◽

Absorption Spectroscopy ◽

Powder Diffraction ◽

Structural Studies ◽

X Ray ◽

High Area ◽

X Ray Absorption

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Structural Studies of Technetium−Zirconium Alloys by X-ray Diffraction, High-Resolution Electron Microscopy, and First-Principles Calculations

Inorganic Chemistry ◽

10.1021/ic9016257 ◽

2010 ◽

Vol 49 (4) ◽

pp. 1433-1438 ◽

Cited By ~ 13

Author(s):

Frederic Poineau ◽

Thomas Hartmann ◽

Philippe F. Weck ◽

Eunja Kim ◽

G. W. Chinthaka Silva ◽

...

Keyword(s):

Electron Microscopy ◽

High Resolution ◽

First Principles ◽

Zirconium Alloys ◽

High Resolution Electron Microscopy ◽

Structural Studies ◽

First Principles Calculations ◽

X Ray Diffraction ◽

X Ray ◽

Resolution Electron

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Structural studies of trigonal lamellar particles of gold and silver

Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences ◽

10.1098/rspa.1993.0035 ◽

1993 ◽

Vol 440 (1910) ◽

pp. 589-609 ◽

Cited By ~ 147

Keyword(s):

Electron Microscopy ◽

High Resolution ◽

High Resolution Electron Microscopy ◽

Structural Studies ◽

Growth Mechanisms ◽

X Ray Diffraction ◽

Structural Requirements ◽

Plan View ◽

X Ray ◽

Resolution Electron

The results of detailed structural studies of trigonal lamellar particles of both gold and silver are presented. The particles have been characterized both in sol by means of optical spectroscopy and powder X-ray diffraction and ex sol using high resolution electron microscopy in both plan view and profile imaging modes. The results of these studies have indicated that the particles have a trigonal outline and are shortened along a ≺111≻ direction to give a plate-like morphology. The presence of small numbers of parallel {111} twin planes has also been confirmed and used to explain the presence of the formally forbidden ⅓{422} reflections observed in plan view. The precise structural requirements for the observation of such reflections has also been confirmed using multislice calculations. Possible growth mechanisms for these particles are also discussed.

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High-Temperature Structural Studies of SrPbO3 and BaPbO3

Australian Journal of Chemistry ◽

10.1071/ch02023 ◽

2002 ◽

Vol 55 (8) ◽

pp. 543 ◽

Cited By ~ 17

Author(s):

J. R. Hester ◽

C. J. Howard ◽

B. J. Kennedy ◽

R. Macquart

Keyword(s):

Phase Transitions ◽

High Temperature ◽

High Resolution ◽

Powder Diffraction ◽

Room Temperature ◽

Structural Studies ◽

X Ray ◽

First Order

High-resolution X-ray powder diffraction studies have shown BaPbO3 to transform from an orthorhombic Imma structure at room temperature, through an intermediate I4/mcm phase, to a cubic Pm3–mstructure above 500�C. The Imma to I4/mcm transition is first order and the I4/mcm–Pm3–m transition for BaPbO3 is tricritical in nature. We find no evidence for any phase transitions in SrPbO3 up to 760�C, the structure remaining in Pnma from room temperature to 760�C.

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Structure of sputter-deposited amorphous Pd-Si alloy studied by High Resolution Electron Microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100173765 ◽

1990 ◽

Vol 48 (4) ◽

pp. 126-127

Author(s):

Yoshihiko Hirotsu ◽

Kazunori Anazawa ◽

Sigemaro Nagakura

Keyword(s):

Electron Microscopy ◽

High Resolution ◽

Amorphous Alloys ◽

High Resolution Electron Microscopy ◽

Structural Studies ◽

X Ray ◽

Resolution Electron ◽

Medium Range ◽

Atomic Distance ◽

Sputter Deposited

Recent structural studies of amorphous alloys by precise X-ray and neutron diffraction, Mossbauer spectroscopy and NMR have shown an atomic ordering developing beyond the first neighbor atomic distance, which is called a medium range ordering (MRO) of atoms in amorphous alloys. Lattice fringe images extending in a range of 1 to 2 nm have been observed in amorphous alloys by high resolution electron microscopy(HREM), indicating a possible formation of the MRO structures. In our HREM study of amorphous Pd77.5Cu6Si16.5 alloy ribbons, MRO domains with α-Pd-like structure were observed under the most appropriate underfocus condition. For more detailed understanding of MRO structure, it is necessary to calculate HREM images for possible MRO models and compare them with observed ones. In this study, we calculated HREM images for an amorphous Pd80Si20 with (1) a dense random packing(DRP) structure, (2) a FCC MRO structure( a FCC cluster embedded in the DRP structure) and (3) an icosahedral MRO structure( an icosahedral cluster embedded in the DRP structure).

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