The importance of H_(2) in the controlled growth of semiconducting single-wall carbon nanotubes

作     者：Feng Zhang Jia Sun Yonggang Zheng Peng-Xiang Hou Chang Liu Min Cheng Xin Li Hui-Ming Cheng Zhen Chen Feng Zhang;Jia Sun;Yonggang Zheng;Peng-Xiang Hou;Chang Liu;Min Cheng;Xin Li;Hui-Ming Cheng;Zhen Chen

作者机构：Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and EngineeringUniversity of Science and Technology of Chin1Shenyang 110016China International Research Center for Computational MechanicsState Key Laboratory of Structural Analysis for Industrial EquipmentDepartment of Engineering MechanicsFaculty of Vehicle Engineering and MechanicsDalian University of TechnologyDalian 116024China Shenzhen Geim Graphene CenterTsinghua-Berkeley Shenzhen InstituteTsinghua UniversityShenzhen 518055China Department of Civil and Environmental EngineeringUniversity of MissouriColumbi1MO 65211USA 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2020年第54卷第19期

页      面：105-111页

核心收录：

学科分类：081702[工学-化学工艺] 07[理学] 0806[工学-冶金工程] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the Ministry of Science and Technology of China(No.2016YFA0200101) the National Natural Science Foundation of China(Nos.51702325,51625203,51532008,51521091,51572264 and 5171101360) 

主　　题：Single-wall carbon nanotubes Controlled growth Semiconducting Growth mode H_(2) 

摘      要：H_(2) is considered an indispensable component of the atmosphere for the growth of high-quality singlewall carbon nanotubes(SWCNTs)by chemical vapor ***,details of the roles H_(2) playing are still unclear due to the complex conditions of SWCNT *** this study,we elucidate the functions of H_(2) in the selective growth of semiconducting SWCNTs(s-SWCNTs)by using monodispersed uniform Fe nanoparticles as a ***-quality s-SWCNTs were synthesized by finely tuning the concentration of H_(2) and the other growth *** data combined with atomistic simulations indicate that H_(2) not only adjusts the concentration of the carbon source,but also serves as a mild etchant that selectively removes small carbon caps grown by a perpendicular mode from the Fe *** results provide useful hints for the controlled growth of SWCNTs with a semiconducting or metallic conductivity,and even a specific chirality.