1 selected entry has been cited at least 41 times (SCI, 17-05-2024)

Article	Y. Li, M. Kröger Viscoelasticity of carbon nanotube buckypaper: Zipping-unzipping mechanism and entanglement effects Soft Matter 8 (2012) 7822-7830
It has been reported that carbon nanotube (CNT) buckypaper demonstrates frequency- and temperature-invariant viscoelastic properties [Xu et al., Science, 2010, 330, 1364]. In an attempt to provide microscopic insight, we performed coarse-grained molecular dynamics simulations on the viscoelastic properties of model CNT buckypaper. First of all, the model is shown to exhibit the observed frequency- and temperature-invariant viscoelastic features. Analyzing snapshots of the buckypaper under cyclic shear deformation, we furthermore confirm that a zipping.unzipping mechanism plays an important role in the molecular origin of the particular viscoelastic properties of buckypaper. Quantitative inspection of the amount of inter-tube entanglements per CNT, < Z >, reveals that CNT buckypaper is faced with reversible entanglement loss during the shear loading process; the equilibrium < Z > is fully recovered if shear loading is removed. The variation of < Z > during a loading. unloading.reloading cycle is found to be insensitive to both frequency and temperature. Our study highlights an energy dissipation mechanism for carbon nanomaterials, which can help us design new energy-adsorption coatings/damping devices under extreme conditions, and seems to rule out a recently proposed scenario of unstable detachments.attachments. for LaTeX users @article{YLi2012-8,  author = {Y. Li and M. Kr\"oger},  title = {Viscoelasticity of carbon nanotube buckypaper: Zipping-unzipping mechanism and entanglement effects},  journal = {Soft Matter},  volume = {8},  pages = {7822-7830},  year = {2012} } \bibitem{YLi2012-8} Y. Li, M. Kr\"oger, Viscoelasticity of carbon nanotube buckypaper: Zipping-unzipping mechanism and entanglement effects, Soft Matter {\bf 8} (2012) 7822-7830. YLi2012-8 Y. Li, M. Kr\"oger Viscoelasticity of carbon nanotube buckypaper: Zipping-unzipping mechanism and entanglement effects Soft Matter,8,2012,7822-7830