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| 001 | 281859 | ||
| 005 | 20240619091203.0 | ||
| 024 | 7 | _ | |a 10.1103/PhysRevE.93.022104 |2 doi |
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| 100 | 1 | _ | |a Bellissent-Funel, Marie-Claire |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a Crossover from localized to diffusive water dynamics in carbon nanohorns: A comprehensive quasielastic neutron-scattering analysis |
| 260 | _ | _ | |a College Park, Md. |c 2016 |b APS |
| 264 | _ | 1 | |3 online |2 Crossref |b American Physical Society (APS) |c 2016-02-02 |
| 264 | _ | 1 | |3 print |2 Crossref |b American Physical Society (APS) |c 2016-02-01 |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a Incoherent neutron scattering by water confined in carbon nanohorns was measured with the backscattering spectrometer SPHERES and analyzed in exemplary breadth and depth. Quasielastic spectra admit δ-plus-Kohlrausch fits over a wide q and T range. From the q and T dependence of fitted amplitudes and relaxation times, however, it becomes clear that the fits do not represent a uniform physical process, but that there is a crossover from localized motion at low T to diffusive α relaxation at high T. The crossover temperature of about 210 to 230 K increases with decreasing wave number, which is incompatible with a thermodynamic strong-fragile transition. Extrapolated diffusion coefficients D(T) indicate that water motion is at room temperature about 2.5 times slower than in the bulk; in the supercooled state this factor becomes smaller. At even higher temperatures, where the α spectrum is essentially flat, a few percentages of the total scattering go into a Lorentzian with a width of about 1.6μeV, probably due to functional groups on the surface of the nanohorns. |
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| 693 | _ | _ | |a Forschungs-Neutronenquelle Heinz Maier-Leibnitz |e SPHERES: Backscattering spectrometer |f NL6S |1 EXP:(DE-MLZ)FRMII-20140101 |0 EXP:(DE-MLZ)SPHERES-20140101 |5 EXP:(DE-MLZ)SPHERES-20140101 |6 EXP:(DE-MLZ)NL6S-20140101 |x 0 |
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| 700 | 1 | _ | |a Kaneko, Katsumi |0 P:(DE-HGF)0 |b 1 |
| 700 | 1 | _ | |a Ohba, Tomonori |0 P:(DE-HGF)0 |b 2 |
| 700 | 1 | _ | |a Appavou, Marie-Sousai |0 P:(DE-Juel1)130507 |b 3 |
| 700 | 1 | _ | |a Soininen, Antti |0 P:(DE-Juel1)158059 |b 4 |u fzj |
| 700 | 1 | _ | |a Wuttke, Joachim |0 P:(DE-Juel1)131044 |b 5 |e Corresponding author |
| 773 | 1 | 8 | |a 10.1103/physreve.93.022104 |b American Physical Society (APS) |d 2016-02-02 |n 2 |p 022104 |3 journal-article |2 Crossref |t Physical Review E |v 93 |y 2016 |x 2470-0045 |
| 773 | _ | _ | |a 10.1103/PhysRevE.93.022104 |g Vol. 93, no. 2, p. 022104 |0 PERI:(DE-600)2844562-4 |n 2 |p 022104 |t Physical review / E |v 93 |y 2016 |x 2470-0045 |
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