| 查看: 307 | 回复: 1 | |||
| 【奖励】 本帖被评价1次，作者meto增加金币 0.5 个 | |||
| 当前主题已经存档。 | |||
[资源]
SCIENCE上一篇重要的有关碳管力学性能的文章
|
|||
|
SCIENCE上一篇重要的有关碳管力学性能的文章 SCIENCE VOL. 277 26， 1997，1971-5. REPORTS Nanobeam Mechanics: Elasticity, Strength, and Toughness of Nanorods and Nanotubes Eric W. Wong,* Paul E. Sheehan,* Charles M. Lieber E. W. Wong and P. E. Sheehan, Department of Chemistry, Harvard University, Cambridge, MA 02138, USA. C. M. Lieber, Department of Chemistry and Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA. ABSTRACT: The Young’s modulus, strength, and toughness of nanostructures are important to proposed applications ranging from nanocomposites to probe microscopy, yet there is little direct knowledge of these key mechanical properties. Atomic force microscopy was used to determine the mechanical properties of individual, structurally isolated silicon carbide (SiC) nanorods (NRs) and multiwall carbon nanotubes (MWNTs) that were pinned at one end to molybdenum disulfide surfaces. The bending force was measured versus displacement along the unpinned lengths. The MWNTs were about two times as stiff as the SiC NRs. Continued bending of the SiC NRs ultimately led to fracture, whereas the MWNTs exhibited an interesting elastic buckling process. The strengths of the SiC NRs were substantially greater than those found previously for larger SiC structures, and they approach theoretical values. Because of buckling, the ultimate strengths of the stiffer MWNTs were less than those of the SiC NRs, although the MWNTs represent a uniquely tough, energy-absorbing material |
回复此楼» 收录本帖的淘帖专辑推荐
 感兴趣 |
» 猜你喜欢
【长期招聘】复旦大学 AI 制药实验室 博士后招聘
已经有11人回复
-
2027博士申请-临床检验诊断学、病原生物学、微生物方向
已经有5人回复
-
各位基础老师们，看完中央《从严治党》的决定后，对学术界更加有信心了吧
已经有4人回复