Andalouci Ahmed, Roussigné Yves, Farhat Samir, Chérif Salim Mourad
Université Sorbonne Paris Nord, LSPM, CNRS, UPR 3407, F-93430, Villetaneuse, France.
J Phys Condens Matter. 2020 Aug 13;32(45). doi: 10.1088/1361-648X/aba3ee.
Assemblies of vertical multiwall carbon nanotubes, (VCNTs), have been synthesized by coupling dewetting of cobalt or nickel ultrathin layers and plasma enhanced chemical vapor deposition. Electronic microscopies revealed well defined micrometer length nanotubes with inner radius of 3-4 nm and outer radius of 8-9 nm. Similar structural qualities have been revealed by Raman measurements. Dynamic behaviour of these VCNTs assemblies have been studied by means of Brillouin light scattering technique. The measured inelastic light scattering from VCNTs is attributed to bending vibrations of the nanotubes. The observed frequencies on both assemblies, considered as dense effective media, are compatible with an effective Young modulus of 850 GPa.
通过耦合钴或镍超薄层的去湿和等离子体增强化学气相沉积，合成了垂直多壁碳纳米管（VCNT）组件。电子显微镜显示出具有明确界定的微米级长度的纳米管，其内径为3-4纳米，外径为8-9纳米。拉曼测量也揭示了类似的结构特征。利用布里渊光散射技术研究了这些VCNT组件的动态行为。从VCNT测得的非弹性光散射归因于纳米管的弯曲振动。将这两个组件视为致密有效介质时，观察到的频率与850 GPa的有效杨氏模量相符。
