Characterization of Interlayer Sliding Deformation for Individual Multiwalled Carbon Nanotubes Using Electrostatically Actuated Nanotensile Testing Device
Characterization of Interlayer Sliding Deformation for Individual Multiwalled Carbon Nanotubes Using Electrostatically Actuated Nanotensile Testing Device
复制标题
使用静电驱动纳米拉伸测试装置表征单个多壁碳纳米管的层间滑动变形
DOI：
10.1109/jmems.2014.2301849
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
and Yoshitada Isono
中科院分区：
文献类型：
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作者：
Hyun-Jin Oh;Hideaki Omori;Mitsutaka Sadakata;Ikko Tsubokura;and Yoshitada Isono
为了研究常压化学气相沉积法制备的多壁碳纳米管(MWCNTs)的力学特性，我们研制了一套包括最新设计的静电驱动纳米拉伸测试装置(EANAT)在内的原位扫描电子显微镜(SEM)纳米材料操纵系统。新的EANAT可以使用集成到悬臂运动放大系统中的电容式位移传感器来测量纳米材料的单轴拉伸位移。测量位移的分辨率最小为0.28 nm。该纳米材料操纵系统允许从衬底中拾取单个MWCNT并将其连接到EANAT上。从纳米拉伸测试中成功地获得了单个多壁碳纳米管的应力-应变关系，杨氏模数估计在338-623 GPA范围内。单个多壁碳纳米管在单轴载荷下的变形伴随着反复的粘滑和硬粘着事件，如伸缩运动。根据拉伸载荷-位移曲线中的剪切相互作用力和扫描电子显微镜观察，直接得到了拉伸载荷作用下碳纳米管层间滑动粘滑时的剪切强度。根据单次抽提模型估算，其剪切强度比高质量结晶石墨平均高出78 Mpa，这可能是由于层间粘结较硬所致。
We have developed an in situ scanning electron microscopy (SEM) nanomaterial manipulation system, including a newly designed electrostatically actuated nanotensile testing device (EANAT), in order to investigate the mechanical characteristics of multiwalled carbon nanotubes (MWCNTs) synthesized by atmospheric pressure-chemical vapor deposition. The new EANAT can measure uniaxial tensile displacement of nanomaterials using a capacitive displacement sensor incorporated into a cantilever motion amplification system. The resolution of the measurement displacement was 0.28 nm at the minimum. The nanomaterial manipulation system allows for an individual MWCNT to be picked up from a substrate and to be attached to an EANAT. The stress-strain relationships for the individual MWCNTs were successfully obtained from the nanotensile tests, and Young's moduli were estimated to be in the range from 338 to 623 GPa. The deformation of individual MWCNTs under uniaxial loading was accompanied by repeated stick-slip and hard sticking events like telescopic motion. The shear strength at a stick-slip event during interlayer sliding of MWCNTs under tensile loading was directly derived from the shear interaction force in the tensile load-displacement curves and SEM observations. On the basis of the single-shot extraction model, the shear strength was estimated to be an average of 78 MPa greater than that for high-quality crystalline graphite, which might be caused by the hard sticking between layers.