Threshold pressure for disappearance of size-induced effect in spinel-structure Ge3N4 nanocrystals

Article Abstract:

A study is conducted in the situ synchrotron X-ray diffraction to explore the size-induced compressional effect of nanocrystalline cubic-spinel Ge3N4 to pressures as high as 69.2 GPa. The results indicate that at threshold pressure of ~20 GPa, there is significant disappearance of the size-induced effect in nanocrystalline spinel Ge3N4.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Germanium, Germanium Crystals, X-ray diffraction

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Surface orientation of main and side chains of polyimide alignment layer studied by near-edge X-ray absorption fine structure spectroscopy

Article Abstract:

The average near-surface orientation of the main and side chains of polyimide (PI) for liquid crystal (LC) alignment is studied by near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. It is concluded that the main chain alignment is strongly correlated with the pretilt angle even in the side-chain PI alignment layer.

Usage, X-ray spectroscopy

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Surface structure of a complex inorganic crystal in aqueous solution from classical molecular simulation

Article Abstract:

The theoretical investigation of polar crystal surfaces in solution involves methodological issues that are not entirely resolved. The results of molecular dynamics simulations of potash alum surfaces in contact with aqueous solution are presented.

Analysis, Molecular structure, Molecular dynamics, Atomic properties

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