Single-walled carbon nanotubes (SWCNTs) are a promising material for advancing the field of materials. However, controlling the controlled growth of SWCNTs by conventional chemical vapor deposition or other growth processes remains challenging. Recent studies have shown that some progress has been made in the synthesis mechanism, catalysts and growth processes of SWCNTs, which makes the controlled growth of SWCNTs possible. This paper reviews the common SWCNTs, the synthesis process, and the applications. The paper firstly discusses the differences in the structure and properties of different types of SWCNTs and the related studies on these properties. Next, the paper discusses the mechanisms, catalysts, and growth processes used to synthesize SWCNTs, from experimental characterization to simulation analysis. Subsequently, the paper describes some applications of SWCNTs in popular fields such as functionalization, transistors, electrochemistry, and so on. Finally, a brief outlook on the challenges and future development of these SWCNTs in the research field is presented.

Synthesis and application of single-walled carbon nanotube
    Abstract
    1 Introduction
    2 Types of SWCNTs
        2.1 Chiral index
            2.1.1 Zigzag single-walled carbon nanotubes (Z-SWCNTs)
            2.1.2 Armchair single-wall carbon nanotubes
            2.1.3 Chiral single-walled carbon nanotubes
        2.2 Metallic and semiconductor properties of single-walled carbon nanotubes
            2.2.1 Metallic single-walled carbon nanotubes
            2.2.2 Semiconductor single-walled carbon nanotubes
            2.2.3 Metallic and semiconducting transitions in single-walled carbon nanotubes
        2.3 Other SWCNTs
    3 Synthesis of SWCNTs
        3.1 Synthesis mechanism
        3.2 Catalyst
            3.2.1 Monometallic catalyst
            3.2.2 Bimetallic catalysts
            3.2.3 Other catalysts
        3.3 Growth process of SWCNTs
    4 Applications of SWCNTs
        4.1 Functionalization
        4.2 Transistor
        4.3 Electrochemical applications
        4.4 Film, fiber & textile
    5 Summary and outlook
    Acknowledgements 
    References

• Chenyu Gao(Shandong Engineering Laboratory for Preparation and Application of High‑Performance Carbon‑Materials, College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, Shandong Province, China)
• Yan He(Shandong Engineering Laboratory for Preparation and Application of High‑Performance Carbon‑Materials, College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, Shandong Province, China, Qingdao University, Qingdao 266061, People’s Republic of China)
• Qianpeng Dong(Shandong Engineering Laboratory for Preparation and Application of High‑Performance Carbon‑Materials, College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, Shandong Province, China, ShanDong Dazhan Nano Materials Co., Ltd., Binzhou 256220, Shandong Province, China)
• Peng Wang(Shandong Engineering Laboratory for Preparation and Application of High‑Performance Carbon‑Materials, College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, Shandong Province, China, ShanDong Dazhan Nano Materials Co., Ltd., Binzhou 256220, Shandong Province, China)
• Yan Li(ShanDong Dazhan Nano Materials Co., Ltd., Binzhou 256220, Shandong Province, China)
• Dianming Chu(Shandong Engineering Laboratory for Preparation and Application of High‑Performance Carbon‑Materials, College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, Shandong Province, China, Shandong Province Key Laboratory of Rubber-Based High-Performance Composites and Advanced Manufacturing, Shandong, China)
• Wenjuan Bai(Shandong Engineering Laboratory for Preparation and Application of High‑Performance Carbon‑Materials, College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, Shandong Province, China, Shandong Province Key Laboratory of Rubber-Based High-Performance Composites and Advanced Manufacturing, Shandong, China)
• Rongfeng Jiang(Pirelli Tyre Co., Ltd.(Pirelli Tyre China.), Yanzhou, China)