| 查看: 5206 | 回复: 92 | ||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | ||
[资源]
石墨烯和单层MoS2微观机械性能测试(Science,Nano Letter和ACS Nano)
|
||
|
第一篇文章是2008年Science上利用原子力显微镜测试石墨烯的机械性能。 ------------------ We measured the elastic properties and intrinsic breaking strength of free-standing monolayer graphene membranes by nanoindentation in an atomic force microscope. The force-displacement behavior is interpreted within a framework of nonlinear elastic stress-strain response, and yields second- and third-order elastic stiffnesses of 340 newtons per meter (N m−1) and −690 N m−1,respectively. The breaking strength is 42 N m−1 and represents the intrinsic strength of a defect-free sheet. These quantities correspond to a Young’s modulus of E = 1.0 terapascals, third-order elastic stiffness of D = –2.0 terapascals, and intrinsic strength of sint = 130 gigapascals for bulk graphite. These experiments establish graphene as the strongest material ever measured, and show that atomically perfect nanoscale materials can be mechanically tested to deformations well beyond the linear regime. -------------------  第二篇文章是加州理工大学的Mingyuan Huang博士在Julia R. Greer教授指导下利用原位纳米压痕技术对石墨烯的电机耦合性能的研究。 ----------------------------- We present the in situ nanoindentation experiments performed on suspended graphene devices to introduce homogeneous tensile strain, while simultaneously carrying out electrical measurements.We find that the electrical resistance shows only a marginal change even under severe strain, and the electronic transport measurement confirms that there is no band gap opening for graphene under moderate uniform strain, which is consistent with our results from the first-principles informed molecular dynamics simulation.  石墨烯电机耦合性能 -------------------------------- 第三篇文章是瑞士一个课题组报道了他们利用原子力显微镜（ＡＦＭ）对单层ＭｏＳ２的机械性能展开的研究。 -------------------------------- We report on measurements of the stiffness and breaking strength of monolayer MoS2, a new semiconducting analogue of graphene. Single and bilayer MoS2 is exfoliated from bulk and transferred to a substrate containing an array of microfabricated circular holes. The resulting suspended, free-standing membranes are deformed and eventually broken using an atomic force microscope. We find that the in-plane stiffness of monolayer MoS2 is 180 ( 60 Nm1, corresponding to an effective Young's modulus of 270(100 GPa, which is comparable to that of steel. Breaking occurs at an effective strain between 6 and 11% with the average breaking strength of 15(3 Nm1 (23 GPa). The strength of strongest monolayer membranes is 11% of its Young's modulus, corresponding to the upper theoretical limit which indicates that the material can be highly crystalline and almost defect-free. Our results show that monolayer MoS2 could be suitable for a variety of applications such as reinforcing elements in composites and for fabrication of flexible electronic devices. ------------------------------  单层MoS2机械性能测试[ Last edited by bingan727 on 2012-1-6 at 01:29 ] |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : Graphene electronic-mechanical coupling nanoindentation.pdf
- 附件 2 : Stretch MoS2.pdf
- 附件 3 : Graphene mechanical properties-Science Magazine.pdf
2012-01-06 12:31:16, 894.28 K
2012-01-06 12:31:36, 3.21 M
2012-01-06 15:24:52, 443.71 K
» 猜你喜欢
南京晓庄学院绿色能源材料团队招生
已经有0人回复
-
北方工业大学储能技术-02电化学储能与氢能方向招收2026级二次调剂学生
已经有0人回复
-
金属材料论文润色/翻译怎么收费?
已经有153人回复
-
求助WO3.cif文件 对应PDF卡片 43-1035，单斜晶系 , P21/n 。
已经有2人回复
-
稀土发光分析｜核壳结构｜寿命拟合
已经有13人回复
-
稀土发光分析｜核壳结构｜寿命拟合
已经有6人回复
-
稀土发光分析｜核壳结构｜寿命拟合
已经有0人回复
-
稀土发光分析｜核壳结构｜寿命拟合
已经有0人回复
-
26 届青岛大学纺织化学与染整工程硕士（液体纳米分散染料方向）求申博建议
已经有3人回复
-
26 届青岛大学纺织化学与染整工程（液体纳米分散染料）求浙理工纺织 / 材料博导名额
已经有1人回复
» 本主题相关商家推荐: (我也要在这里推广)
68楼2013-11-06 13:39:20
简单回复
wtiger2楼
2012-01-06 12:27
回复
五星好评 顶一下，感谢分享！
紫芳枝叶3楼
2012-01-06 14:50
回复
五星好评 顶一下，感谢分享！
caoge4楼
2012-01-06 15:20
回复
五星好评 顶一下，感谢分享！
归兰居5楼
2012-01-06 16:00
回复
五星好评 顶一下，感谢分享！
lsk_06楼
2012-01-06 19:59
回复
三星好评 顶一下，感谢分享！
lsk_07楼
2012-01-06 19:59
回复
顶一下，感谢分享！
lsk_08楼
2012-01-06 20:00
回复
顶一下，感谢分享！
2012-01-06 20:54
回复
五星好评 顶一下，感谢分享！
麦客00110楼
2012-01-07 01:04
回复
五星好评 顶一下，感谢分享！
lizhaolong11楼
2012-01-07 07:59
回复
五星好评 顶一下，感谢分享！
lizhaolong12楼
2012-01-07 07:59
回复
顶一下，感谢分享！
lizhaolong13楼
2012-01-07 08:00
回复
顶一下，感谢分享！
fmbs11014楼
2012-01-07 10:08
回复
五星好评 顶一下，感谢分享！