Modified free volume theory of self-diffusion and molecular theory of shear viscosity of liquid carbon dioxide

Article Abstract:

The density functional theory of transport coefficients are applied to carbon dioxide and the shear viscosity of carbon dioxide s computed without using the empirical approach. The self-diffusion coefficients thus computed are used to compute the density and temperature dependence of the shear viscosity of liquid carbon dioxide by employing the density fluctuation theory formula for shear viscosity.

Density functionals, Density functional theory, Aqueous solution reactions, Chemical properties

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A vibrational spectroscopic study of the fate of oxygen-containing functional groups and trapped CO2 in single-walled carbon nanotubes during thermal treatment

Article Abstract:

The oxygen-containing functional groups, introduced by common purification procedures, on single-walled carbon nanotubes made by both the HiPco and laser-ablation techniques are studied by Fourier Transform Infrared (FTIR) spectroscopy from 90 to 1400 K under vacuum. Effectiveness of the vacuum heating in removing most of the functionalities created in HNO3-treated HiPco samples is revealed.

Analysis, Fourier transform infrared spectroscopy, Vibrational spectra, Nanotubes

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Metastable electrons, high-mobility solvent anions, and charge transfer reactions in supercritical carbon dioxide

Article Abstract:

Time-resolved dc photoconductivity is used to observe quasifree electrons and solvent radicals anions in supercritical carbon dioxide. Results reveal that quasifree electrons are trapped in less than 200 ps, yielding long-lived (> 10 micro s) solvent radical atoms.

Chemical reactions, Atomic properties

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