Neutron scattering study on dynamics of water molecules in MCM-41

Article Abstract:

Quasi-elastic neutron scattering was used to investigate the dynamics of water molecules confined in MCM-41. The measurement was performed for three water-filled MCM-41 samples with different pore sizes in the temperature range 200-300 K. A model that was used in a study for bulky water was employed for the analysis of the spectra. The results showed that the translational diffusion of the confined water molecules demonstrated the Arrhenius type of temperature dependence, which was in contrast to a non-Arrhenius behavior for bulk water.

Analysis, Scattering (Physics), Molecular spectra

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Low temperature properties of acetonitrile confined in MCM-41

Article Abstract:

The effect of confinement on the phase changes and dynamics of acetonitrile in mesoporous MCM-41 was examined by the use of absorption, FT-IR, DSC, and quasi-elastic neutron scattering (QENS) measurements. The measurements indicated that the condensed phase is very similar to the bulk liquid and the phase changes between alpha-type and beta-type acetonitriles were observed below the melting points.

Semiconductors and related devices, Semiconductor and Related Device Manufacturing, Science & research, All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Multichip Hybrid Circuits, Acetonitrile, Atomic properties, Multichip module, Multichip modules

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X-ray diffraction study of water confined in mesoporous MCM-41 materials over a temperature range of 223-298 K

Article Abstract:

It has been possible to measure X-ray scattering from water confined in the MCM-41 materials C10 and C14. It was established that a decrease in porous size leads to a rise in non-hydrogen-bonded part in the water structure.

X-rays, X-ray diffraction, Electromagnetic scattering, Electrolysis

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