Lim Hong En, Nakanishi Yusuke, Liu Zheng, Pu Jiang, Maruyama Mina, Endo Takahiko, Ando Chisato, Shimizu Hiroshi, Yanagi Kazuhiro, Okada Susumu, Takenobu Taishi, Miyata Yasumitsu
Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan.
Innovative Functional Materials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Nagoya 463-8560, Japan.
Nano Lett. 2021 Jan 13;21(1):243-249. doi: 10.1021/acs.nanolett.0c03456. Epub 2020 Dec 13.
The development of bulk synthetic processes to prepare functional nanomaterials is crucial to achieve progress in fundamental and applied science. Transition-metal chalcogenide (TMC) nanowires, which are one-dimensional (1D) structures having three-atom diameters and van der Waals surfaces, have been reported to possess a 1D metallic nature with great potential in electronics and energy devices. However, their mass production remains challenging. Here, a wafer-scale synthesis of highly crystalline transition-metal telluride nanowires is demonstrated by chemical vapor deposition. The present technique enables formation of either aligned, atomically thin two-dimensional (2D) sheets or random networks of three-dimensional (3D) bundles, both composed of individual nanowires. These nanowires exhibit an anisotropic 1D optical response and superior conducting properties. The findings not only shed light on the controlled and large-scale synthesis of conductive thin films but also provide a platform for the study on physics and device applications of nanowire-based 2D and 3D crystals.
开发用于制备功能纳米材料的批量合成工艺对于在基础科学和应用科学领域取得进展至关重要。过渡金属硫族化物（TMC）纳米线是一种具有三原子直径和范德华表面的一维（1D）结构，据报道具有1D金属性质，在电子和能量器件方面具有巨大潜力。然而，其大规模生产仍然具有挑战性。在此，通过化学气相沉积展示了高度结晶的过渡金属碲化物纳米线的晶圆级合成。本技术能够形成由单个纳米线组成的排列整齐、原子级薄的二维（2D）片材或三维（3D）束状随机网络。这些纳米线表现出各向异性的1D光学响应和优异的导电性能。这些发现不仅为导电薄膜的可控大规模合成提供了思路，还为基于纳米线的2D和3D晶体的物理和器件应用研究提供了一个平台。
