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硅掺杂碳纳米管薄膜的制备及其力学性能

发表时间:2016-06-30  浏览量:1966  下载量:1101
全部作者: 童潇,李达,李翔
作者单位: 南京理工大学材料科学与工程学院;中国科学院苏州纳米技术与纳米仿生研究所;中国科学技术大学纳米科学技术学院
摘 要: 通过浮动催化化学气相沉积法成功制备了硅原子掺杂的碳纳米管薄膜。利用扫描电子显微镜(scanning electron microscope,SEM)、透射电子显微镜(transmission electron microscope,TEM)、X射线光电子能谱分析(X-ray photoelectron spectroscopy,XPS)、激光拉曼光谱仪(Raman)等研究硅原子掺杂对碳纳米管微观结构和宏观薄膜力学性能的影响。结果表明:杂原子的引入会破坏碳纳米管原有的完整结构,产生大量缺陷,造成部分碳管坍塌。由于坍塌管的界面接触面积增加,粘附力增强,因此硅掺杂碳膜的力学性能比原始碳膜有成倍的提高。
关 键 词: 无机非金属材料;碳纳米管薄膜;硅掺杂;坍塌;拉伸强度
Title: Synthesis and mechanical properties of Si-doped CNTs
Author: TONG Xiao, LI Da, LI Xiang
Organization: School of Materials Science and Engineering, Nanjing University of Science and Technology; Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences; Nano Science and Technology Institute, University of Science and Technology of China
Abstract: We report the successfully synthesis of carbon nanotube (CNT) film by floating catalyst chemical vapor deposition in the presence of electron donor element Si. Scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and laser Raman spectrometer (Raman) were utilized to evaluate the effects of Si-doping on structure and mechanical property of carbon nanotube. Results indicated that the introduction of heteroatom into hexagonal carbon framework damaged the structure and increased the defect degrees of CNTs, therefore, some of CNTs collapsed under their own pressure. Due to the larger area contact and stronger interfacial adhesions induced by the collapse, the as-prepared Si-CNT film exhibit superior mechanical properties than raw CNT film.
Key words: inorganic nonmetallic materials; carbon nanotube film; Si-doping; collapse; tensile strength
发表期数: 2016年6月第12期
引用格式: 童潇,李达,李翔. 硅掺杂碳纳米管薄膜的制备及其力学性能[J]. 中国科技论文在线精品论文,2016,9(12):1212-1217.
 
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