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| Hauptseite > Publikationsdatenbank > Chain Confinement and Anomalous Diffusion in the Cross over Regime between Rouse and Reptation > print |
| Hauptseite > Publikationsdatenbank > Chain Confinement and Anomalous Diffusion in the Cross over Regime between Rouse and Reptation > print |
| 001 | 911918 | ||
| 005 | 20230224084259.0 | ||
| 024 | 7 | _ | |a 10.1021/acsmacrolett.2c00608 |2 doi |
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| 100 | 1 | _ | |a Sharma, Aakash |0 P:(DE-Juel1)180820 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Chain Confinement and Anomalous Diffusion in the Cross over Regime between Rouse and Reptation |
| 260 | _ | _ | |a Washington, DC |c 2022 |b ACS |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a By neutron spin echo (NSE) and pulsed field gradient (PFG) NMR, we study the dynamics of a polyethylene-oxide melt (PEO) with a molecular weight in the transition regime between Rouse and reptation dynamics. We analyze the data with a Rouse mode analysis allowing for reduced long wavelength Rouse modes amplitudes. For short times, subdiffusive center-of-mass mean square displacement ⟨rcom2(t)⟩ was allowed. This approach captures the NSE data well and provides accurate information on the topological constraints in a chain length regime, where the tube model is inapplicable. As predicted by reptation for the polymer ⟨rcom2(t)⟩, we experimentally found the subdiffusive regime with an exponent close to 𝜇=12, which, however, crosses over to Fickian diffusion not at the Rouse time, but at a later time, when the ⟨rcom2(t)⟩ has covered a distance related to the tube diameter. |
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| 700 | 1 | _ | |a Kruteva, Margarita |0 P:(DE-Juel1)130777 |b 1 |e Corresponding author |
| 700 | 1 | _ | |a Allgaier, Jürgen |0 P:(DE-Juel1)130501 |b 2 |
| 700 | 1 | _ | |a Hoffmann, Ingo |0 0000-0001-7178-6467 |b 3 |
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| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/911918/files/acsmacrolett.2c00608.pdf |
| 856 | 4 | _ | |y Published on 2022-11-21. Available in OpenAccess from 2023-11-21. |u https://juser.fz-juelich.de/record/911918/files/Manuscript.pdf |
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