@article{Huangfu2025, 
author = {Ying Huangfu and Ping Lu and Jiang Zhong and Qiankun Zhang and Jingyi Liang and Zhengwei Zhang and Biao Qin and Zucheng Zhang and Ziwei Huang and Wei Li and Kun He and Xiaohui Lin and Xiangdong Yang and Jia Li and Bo Li and Weiyou Yang and Zhang Lin and Liyuan Chai and Xidong Duan},
title = {In situ synthesis of large-area sixfold-oriented Mo6Te6 nanowires networks through hydrogen-assisted annealing of 2H MoTe2 nanosheets},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {8},
pages = {94907628},
keywords = {surface enhanced Raman spectroscopy (SERS), Mo6Te6 nanoribbons, sixfold-oriented, 2H MoTe2, hydrogen-assisted annealing},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907628},
doi = {10.26599/NR.2025.94907628},
abstract = {Phase transition and edge structure reconstruction of two-dimensional (2D) materials are critical for modulating their properties and applications. Here, we employ a hydrogen-assisted annealing method to accomplish the extensive transformation from a 2H MoTe2 single crystal to Mo6Te6 nanowires and quasi-2D Mo6Te6 nanoribbons. Introducing hydrogen gas during atmospheric pressure annealing process generates a Te-poor chemical environment, which makes the transformations energetically favorable and is essential for the fast growth of Mo6Te6 nanowires. Mo6Te6 nanowires nucleate at the exposed edges of 2H MoTe2 and grow along its [ 112¯0], [ 2¯110], and [ 12¯10] crystallographic directions, demonstrating long-range order and forming quais-2D nanoribbons with lengths up to 50 μm. Finally, nanoribbons align in sixfold oriented directions and form an array within 3 mm2 area on SiO2/Si substrate. Mo6Te6 nanowires display metallic behavior and have large charge transfer with Rhodamine 6G, making them excellent substrates for surface-enhanced Raman scattering. It shows a low detectable concentration of 10−13 mol/L for Rhodamine 6G and a Raman enhancement factor of 7 × 108. Our findings provide an economic and efficient synthesis method for producing sixfold-oriented Mo6Te6 nanowires and nanoribbons networks, which can serve as platform for exploring low-dimensional physical properties, designing electronic devices, and applications in analytical chemistry.}
}