Anisotropic photochemical reactivity of bulk TiO2 crystals

Article Abstract:

The photochemical reactivity of titanium surfaces can minimize impurities found in air and water. Experiments were performed to investigate the anisotropic reactivity of thin rutile polycrystals and bulk samples of titanium dioxide (TiO2) crystals. Polycrystalline ceramics made of individual crystallites estimated at 55 micrometers in diameter were examined. The findings demonstrate that the most reactive orientations were localized in the {101} plane. Moreover, anisotropic properties were dependent on the surface planes and not on the bulk orientation.

Analysis, Thin films, Titanium dioxide, Photochemical research

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Polarization reversal in AlPO4(super -5) crystals containing polar or nonpolar organic molecules: a scanning pyroelectric microscopy study

Article Abstract:

A study was conducted to analyze large AlPO4(super -5) crystals supporting different guest molecules by scanning pyroelectric microscopy. The crystals were hydrothermally synthesized at about 180 degrees C. Results indicated that the lattice in calcined AlPO4(super -5) crystals were pyroelectric and supported a polarization reversal at the center of the crystals. Findings also showed that the presence of guest molecules altered the position and sharpness of the phase transition.

Usage, Molecular dynamics, Chemical microscopy, Pyroelectricity

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EPR and ENDOR studies of single crystals of alpha-glycine x-ray irradiated at 295 K

Article Abstract:

A study was conducted to analyze single crystals of the amino acid alpha-glycine H3+N-CH2-COO- that were irradiated at 280 K. Partially deuterated samples were determined by repeated recyrstallization from 99.8 g/100 g purity deuterium oxide solutions. A Philips tungsten target tube was utilized to irradiate the crystals. Results indicated that the radical I supported features similar to efficient cross relaxation resulting from the rapid rotation of amino groups.

Amino acids, Glycine

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