Probing the mechanical properties of carbon nanohorns subjected to uniaxial compression and hydrostatic pressure
文献类型：期刊论文
| 作者 | Nan, Yanli1; Li, Bo1,2,3; Zhao, Xiang2,3; Song, Xiaolong1; Su, Lei4,5 |
| 刊名 | CARBON
 |
| 出版日期 | 2017-12-01 |
| 卷号 | 125页码:236-244 |
| 英文摘要 | Carbon nanohorns (CNHs) as an important carbon nanostructure have been studied in many fields and shows huge potential for applications. Previous studies exhibit that CNHs consist of single-walled carbon nanohorns in the periphery and a graphene-based core in the center. However, the knowledge of their mechanical properties is still lacking. Here, the mechanical behaviors of CNHs subjected to uniaxial compression and hydrostatic pressure have been probed. Under uniaxial compression, two opposite dynamic responses were found to demonstrate different natures of flexible nanohorns and hard cores. The former shows good elastic recoverability but a hardening effect during multiple cycle loading, while the latter possess good load-bearing ability reflected by high compressive strength (max. Value of 18.8 +/- 4.5 GPa) and high stiffness (max. Young' modulus of 84.6 +/- 27.8 GPa). In hydrostatic state, the mechanical response is monitored by simultaneous Raman measurements through the shift of either G or 2D phonons of CNHs. The results show that two anomalies at pressures of similar to 3 and similar to 7.5 GPa have occurred, resulting from the nanohorns' cross-sectional shapes from circular-to-oval and oval-to-peanutlike structural phase transitions, respectively. Analysis based on Gruneisen parameter demonstrates the similarity of hydrostatic behaviors of CNHs and single-walled nanotubes, indicating high structural stability under high pressure. (C) 2017 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/41297]  |
| 专题 | 化学研究所_光化学实验室 |
| 作者单位 | 1.Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China 2.Xi An Jiao Tong Univ, Sch Sci, Inst Chem Phys, Xian 710049, Shaanxi, Peoples R China 3.Xi An Jiao Tong Univ, Sch Sci, Dept Chem, Xian 710049, Shaanxi, Peoples R China 4.Zhengzhou Univ Light Ind, Ctr High Pressure Sci & Technol Res, Zhengzhou 450002, Henan, Peoples R China 5.Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Nan, Yanli,Li, Bo,Zhao, Xiang,et al. Probing the mechanical properties of carbon nanohorns subjected to uniaxial compression and hydrostatic pressure[J]. CARBON,2017,125:236-244. |
| APA | Nan, Yanli,Li, Bo,Zhao, Xiang,Song, Xiaolong,&Su, Lei.(2017).Probing the mechanical properties of carbon nanohorns subjected to uniaxial compression and hydrostatic pressure.CARBON,125,236-244. |
| MLA | Nan, Yanli,et al."Probing the mechanical properties of carbon nanohorns subjected to uniaxial compression and hydrostatic pressure".CARBON 125(2017):236-244. |
入库方式： OAI收割
来源：化学研究所
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