Chain dynamics in a hexadecane melt as seen by neutron scattering and identified by molecular dynamics simulations

Chain dynamics in a hexadecane melt as seen by neutron scattering and identified by molecular dynamics simulations
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通过中子散射观察并通过分子动力学模拟识别的十六烷熔体中的链动力学

DOI:
10.1088/0953-8984/24/37/375108
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发表时间:
2012
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
通讯作者:
T. Unruh
T. Unruh
中科院分区:
--
文献类型:
--
作者:
H. Morhenn;S. Busch;T. Unruh

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通过准弹性中子散射和互补分子动力学模拟,揭示了C16H34熔体中不同的局域和全局链动力学行为.因此,它已被证明,测量的中间散射函数可以验证模拟数据的皮秒到纳秒的时间尺度。值得注意的是,实验测量的中间散射函数的形状可以通过分子动力学模拟很好地再现。结果发现,虽然提取的表观活化能对应于长程扩散值,在这个时间范围内的分子动力学主要是由于本地键旋转和整个分子的旋转。
Different local and global chain dynamics in a C 16 H 34 melt could be revealed by resolution resolved time-of-flight quasielastic neutron scattering and complementary molecular dynamics simulations. Thereby it has been demonstrated that the measured intermediate scattering functions can validate the simulated data on the pico-to nanosecond timescale. Remarkably the shape of the experimentally measured intermediate scattering functions can be reproduced excellently by molecular dynamics simulations. It was found that although the extracted apparent activation energy corresponds to the long-range diffusion value, the molecular dynamics in this time range are mainly due to local bond rotations and the rotation of entire molecules.
分子液体中的自扩散:通过准弹性中子散射研究中链正构烷烃和辅酶 Q10。
DOI: 10.1063/1.2943673
发表时间: 2008
期刊: The Journal of chemical physics
影响因子: --
作者:
C. Smuda;S. Busch;G. Gemmecker;T. Unruh
通讯作者: T. Unruh
通过准弹性飞行时间中子能谱观察液体中链正构烷烃的扩散运动。
DOI: 10.1063/1.2990026
发表时间: 2008
期刊: The Journal of chemical physics
影响因子: --
作者:
T. Unruh;C. Smuda;S. Busch;J. Neuhaus;W. Petry
通讯作者: W. Petry
DOI: 10.1103/physrevlett.88.025901
发表时间: 2002-01-14
影响因子: 8.6
作者:
Guenza, M
通讯作者: Guenza, M