Synergistic Charge Engineering in Tellurium-Encapsulated Single-Walled Carbon Nanotubes for Universal Conductivity Enhancement

作者：Jian Yao, Yuqi He, Xin Li, Yu Teng, Chengqiang Ding, Junqi Lai, Pin Zhao, Lin Geng, Song Qiu, Yong Zhang, Junjie Zhang, Qi Chen, Liwei Liu, Lixing Kang · 发表于：ACS Nano · 年份：2025 · DOI：10.1021/acsnano.5c12524 · 被引用次数：6 · 研究领域：Advancements in Battery Materials、Graphene research and applications、Carbon Nanotubes in Composites

With the rapid advancement of electronic device miniaturization, materials are required to possess stronger conductivity at smaller scales. Single-walled carbon nanotubes (SWCNTs) have drawn significant interest due to their outstanding theoretical electrical properties. However, improving their electrical performance remains a significant challenge. In this study, continuous one-dimensional (1D) tellurium (Te) atomic chains were successfully synthesized inside SWCNTs, enabling efficient and stable doping. Unlike previous powder-based studies, polymer-assisted selective sorting was utilized to achieve high-purity Te-filled semiconducting SWCNT (Te@s-SWCNT) solutions. Compared to pristine SWCNTs, Te@s-SWCNT transistors exhibited more than a 4-fold increase in on-state current density. Individual Te-filled metallic SWCNTs (Te@m-SWCNTs) demonstrated current-carrying capacity, achieving current densities ranging from 1.3 to 4.6 × 10 9 A/cm 2 . Theoretical calculations revealed that these improvements result from charge transfer effects between Te and SWCNTs. This research provides a robust foundation for developing next-generation 1D carbon-based electronics.