Ultrathin chromium oxide films on the W(100) surface

Article Abstract:

Ultrathin chromium oxide films are prepared on a W(100) surface under ultra-high conditions and are investigated using X-ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy and low-energy electron diffraction. The results show that CrO2 or Cr2O3 can be formed at Cr coverage of less than 1 monolayer on W(100), depending upon the oxidation conditions and only Cr2O3 is formed when a Cr coverage or more than 1 monolayer is oxidized.

China, Oxidation-reduction reaction, Oxidation-reduction reactions, Optical properties, Photoelectron spectroscopy

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Comment on "effect of chromium substitution on the lattice vibration of spinel lithium manganate: A new interpretation of the Raman spectrum of LiMn2O4"

Article Abstract:

The effects of the chromium substitution in spinel lithium manganate (LiMn(sub2-x)Cr(sub x)O(sub 4) 0 (less than or equal to) x (less than or equal to) 0.5 is examined by means of the X-ray absorption spectroscopy (XAS) and micro-Raman spectroscopy. The results showed that the true Raman spectrum of LiMn2O4 consists of a broad peak at around 580 cm(super -1), with poorly defined features between 300 and 450 cm(super -1).

Lithium Compounds, X-ray spectroscopy

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Preparation and characterization of Cr(CO)4dpp (chromium tetracarbonyl 2,3-bis(2'-pyridyl)pyrazine) adsorbed on silver nanoparticles

Article Abstract:

A transition metal carbonyl species, Cr(CO)4dpp, is successfully attached to bare silver nanoparticles prepared by laser ablation of a metal foil in ethanol. A large binding energy of about 122 kJ/mol is also computed between silver and nitrogen atoms thus lending support to Cr(CO)4dpp being chemisorbed onto the silver surface.

Silver compounds, Ablation (Vaporization technology), Laser ablation

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