収差補正ＴＥＭを用いたナノチューブリアクタにおけるナノ物質生成反応の直接観察

使用像差校正 TEM 直接观察纳米管反应器中的纳米材料生产反应

• 批准号: 13J03413
• 负责人: 趙 思瀚
• 金额: $ 2.11万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2013
• 资助国家: 日本
• 起止时间: 2013-04-01 至 2016-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13J03413/
• 关键词: 2D materials; CVD; TMDs; 2D metals; hBN substrate; NbS2; TMDCs; Superconductivity; in situ TEM; DWCNTs; high temperature TEM; coalescence of CNTs; inter-layer coupling; one-dimensional; optical transitions; excitons

Progress on researches of two-dimensional (2D) metals strongly relies on development of the growth technique. Studies on preparation of 2D metals have so far been limited, and this is in stark contrast to the situation of 2D semiconductors, where various layered semiconductors, including MoS2, WS2, MoSe2, WSe2, have been isolated in its monolayer form. In this work, we have developed a facile method to prepare 2D metallic transition metal dichalcogenides (TMDCs) by chemical vapor deposition (CVD) method, where direct growth of few-layered NbS2 (3R phase) on atomically flat hexagonal boron nitride (hBN) has been demonstrated. Structural characterization of the so-grown NbS2 was performed with atomic force microscopy, optical microscopy, electron microscopy and optical spectroscopy, revealing that the utilization of hBN as growth substrates is a key factor for the first successful CVD growth of 2D metallic TMDCs with large single-domain size (several µm). Electrical transport measurements have clearly shown that NbS2 atomic layers down to few-layer-thickness are metal. The current study opens up a new synthetic route for controllable growth of 2D layered metallic materials, which is of great importance in study of rich physics in 2D metals, as well as in search for novel 2D superconductors.

二维（2D）金属研究的进展强烈依赖于增长技术的发展。到目前为止，有关2D金属制备的研究受到限制，这与2D半导体的情况形成了鲜明的对比，在该情况下，包括MOS2，WS2，MOSE2，WSE2在内的各种分层半导体以其单层形式分离出来。在这项工作中，我们开发了一种简便的方法，可以通过化学蒸气沉积（CVD）方法制备2D金属过渡金属二核苷（TMDC），其中已证明了原子上扁平六角硼硼化物（HBN）对几层NBS2（3R相）的直接生长。使用原子力显微镜，光学显微镜，电子显微镜和光谱法进行了SO生长的NBS2的结构表征，表明HBN作为生长底物的利用是首次成功的CVD生长底物的关键因素，它是2D金属TMDC的首次成功的CVD生长，具有较大的单域大小（几个µM）。 电运输测量清楚地表明，NBS2原子层降至几层厚度是金属。当前的研究为2D层金属材料的可控生长开辟了一条新的合成途径，这对于研究2D金属的丰富物理学以及寻找新颖的2D超导体非常重要。

项目成果

Organic-inorganic azafullerene-gold c59n-au nanohybrid: synthesis, characterization, and properties

有机-无机氮杂富勒烯-金 c59n-au 纳米杂化物：合成、表征和性能

• DOI: 10.1002/chem.201403517
• 发表时间: 2014
• 期刊: Chemistry-a European Journal
• 影响因子: 4.3
• 作者: G. Rotas;M. Niemi;N.V. Tkachenko;S. Zhao;H. Shinohara;and N. Tagmatarchis
• 通讯作者: and N. Tagmatarchis

Rayleigh scattering studies on inter-layer interactions in structure-defined individual double-wall carbon nanotubes

• DOI: 10.1007/s12274-014-0515-y
• 发表时间: 2014-08
• 期刊: Nano Research
• 影响因子: 9.9
• 作者: Sihan Zhao;Tomoya Kitagawa;Y. Miyauchi;K. Matsuda;H. Shinohara;R. Kitaura

7th annual Recent Progress in Graphene and Two-dimensional Materials Research Conference 2015

2015年第七届石墨烯与二维材料研究最新进展会议

• 发表时间: 2015

Unravelling inter-wall interactions on optical transition in double-wall car bon nanotubes

揭示双壁碳纳米管光学跃迁的壁间相互作用

• 发表时间: 2014
• 作者: Mizuuchi Y;Yamamoto H;Nakamura K;Shirahane K;Souzaki M;Tanaka M;Oda Y.;栗田喜久;Sihan Zhao;Yoshifumi Kawasaki;Sihan Zhao
• 通讯作者: Sihan Zhao

Two-dimensional metallic NbS2: growth, optical identification and transport properties

• DOI: 10.1088/2053-1583/3/2/025027
• 发表时间: 2016-05
• 期刊: 2D Materials
• 影响因子: 5.5
• 作者: Sihan Zhao;T. Hotta;T. Koretsune;Kenji Watanabe;T. Taniguchi;K. Sugawara;Takashi Takahashi;H. Shi