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Showing 461 to 470 of 9760 (0.039 seconds)Spelling suggestions: "subject:"dffusion"" "subject:"deffusion""
| 461 |
Crossover from single-file to fickian diffusion in carbon nanotubes and nanotube bundlesLiu, Ying-Chun, Moore, Joshua D., Chen, Qu, Roussel, Thomas J., Wang, Qi, Gubbins, Keith E. 17 November 2015 (has links) (PDF)
The diffusion mechanism of pure component Ar and binary mixtures of Ar/Kr and Ar/Ne confined in single-walled carbon nanotubes (SWNTs) and bundles was investigated by a combined Grand Canonical Monte Carlo and molecular dynamics study.
For Ar confined in SWNTs, a crossover from single-file to Fickian diffusion existed when the density of Ar was a minimum as a function of the SWNT diameter. Argon diffused by a single-file mechanism in SWNTs smaller than an accessible diameter of 1.76σAr, corresponding to (7,7), (12,0) and (8,6) SWNTs but by a Fickian mechanism for SWNTs larger in diameter. Both components in Ar/Kr mixtures had a single-file diffusional mechanism in (6,6) and (7,7) SWNTs and a Fickain mechanism for SWNTs larger in diameter. Likewise, both components in a Ar/Ne mixtures had a single-file diffusional mechanism in a (6,6) CNT, and Ar had a single-file diffusional mechanism in a (7,7) SWCNT. However, Ne in the Ar/Ne mixture exhibited Fickian diffusion in the (7,7) SWNT , which
indicated bi-modal diffusion. Larger diameters of SWNTs provided Fickian diffusion for both components in an Ar/Ne mixture. Argon diffused in a (25,0) SWNT bundle (with a bimodal pore size distribution) in a bimodal mechanism, with Ar diffusing in single-file in interstitial sites and in a Fickian mechanism in inner nanotube channels.
In all cases of single-file diffusion the mean-squared displacement (MSD) of the fluid molecules had a square root of time dependence, while molecules diffusing by a Fickian mechanism had a MSD with a linear time dependence.
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| 462 |
Ferroelectricity and modulated phases in mixed crystals of the A 2 BX 4 -CompoundsBehrendt, Karsten, Gibhardt, Holger, Leist, Jeannis-Nicos, Hradil, Klaudia, Eckold, Götz 10 November 2015 (has links) (PDF)
No description available.
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| 463 |
Investigation of the demixing process in the system Fe 3 O 4 (Magnetite)-FeAl 2 O 4 (Hercynite)Ritter, H., Davaasambuu, Jav, Güthoff, Friedrich, Eckold, Götz 11 November 2015 (has links) (PDF)
No description available.
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| 464 |
In situ XPS study on the electrochemical nitrogen incorporation in YSZValov, Ilia, Luerßen, Bjoern, Mutoro, Eva, Janek, Jürgen 11 November 2015 (has links) (PDF)
No description available.
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| 465 |
XPS on mixed conducting perovskites at elevated temperatures and close-to-ambient gas pressureJoo, Jong-Hoon, Merkle, Rotraut, Maier, Joachim, Kubicek, Markus, Januschewsky, Judith, Fleig, Jürgen, Oestereich, Andreas, Hlavathy, Zoltan, Hävecker, Michael, Knop-Gericke, Axel, Schlögl, Robert 11 November 2015 (has links) (PDF)
No description available.
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| 466 |
Domain redistribution and ferroelectric phase transition in SrTiO 3 under the influence of an electric field and mechanical stressLeist, Jeannis-Nicos, Sidoruk, Jakob, Gibhardt, Holger, Hradil, Klaudia, Meven, Martin, Eckold, Götz 11 November 2015 (has links) (PDF)
No description available.
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| 467 |
In situ electron energy-loss spectroscopy of cobalt and iron valences in a mixed conducting perovskite and the correlation to a phase decomposition at intermediate temperaturesFeldhoff, Armin, Efimov, Konstantin, Arnold, Mirko, Xu, Qiang, Tichelaar, Frans D. 11 November 2015 (has links) (PDF)
No description available.
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| 468 |
Local structure and magnetic behavior of nanocrystalline MnZn spinel ferrite prepared by a one-step mechanochemical routeMyndyk, Maxym, Isfahani, Mohammad Javad Nasr, Menzel, Dirk, Feldhoff, Armin, Amighian, Jamshid, Becker, Klaus-Dieter, Šepelák, Vladimír 11 November 2015 (has links) (PDF)
No description available.
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| 469 |
A one-step mechanochemical synthesis and characterization of SnSe and SnSe 2Achimovičová, Marcela, Rečnik, Aleksander, Myndyk, Maxym, Fabián, Martin, Šepelák, Vladimír 11 November 2015 (has links) (PDF)
No description available.
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| 470 |
Enhanced magnetization in pre-nanocrystalline BiFeO 3 prepared by mechanosynthesisDa Silva, Klebson L., Menzel, Dirk, Feldhoff, Armin, Paesano, Andrea, Šepelák, Vladimir, Litterst, Fred Jochen, Becker, Klaus-Dieter 11 November 2015 (has links) (PDF)
No description available.
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