Creation and characterization of one-dimensional van der Waals heterostructures

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H02543
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 28020:Nanostructural physics-related
• Research Institution: The University of Tokyo
• Principal Investigator: Xiang Rong 東京大学, 大学院工学系研究科(工学部), 准教授 (20740096)
• Co-Investigator(Kenkyū-buntansha): 井ノ上 泰輝 大阪大学, 工学研究科, 助教 (00748949) ; 熊本 明仁 東京大学, 大学院工学系研究科(工学部), 客員共同研究員 (70724590) ; 宮田 耕充 東京都立大学, 理学研究科, 准教授 (80547555)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 一次元ファンデルワールスヘテロ構造 / カーボンナノチューブ / 透過型電子顕微鏡

Outline of Final Research Achievements

By chemical vapor deposition, we have realized the synthesis of one-dimensional van der Waals heterostructurenanotubes, in which boron nitride nanotubes (BNNT) and molybdenum disulfide nanotubes (MoS2NT) are coaxially grown on the outer layer of single-walled carbon nanotubes (SWCNTs). A comprehensive study using a transmission electron microscope was conducted on the detailed structure and formation mechanism of the synthesized heteronanotubes. We identified the edge structures of BNNTs of different shapes and found that they are closely associated with the chiral angles and polarities of the tube. In addition, the correlation between the SWCNT template and BNNT chirality was clarified. This is not limited to the knowledge of the new material group of one-dimensional heterostructure, but from a more general point of view, it is expected to be applied in future electronic devices.

Free Research Field

ナノ材料

Academic Significance and Societal Importance of the Research Achievements

One-dimensional van der Waals heterostructures are a class of new materials. Because of the unique 1D geometry, these heteronanotubes can host new physics and therefore have interesting properties. It may be used in future electronic devices including transistors, solar cells and nanolasers.