Performance information

• 1D Crystallographic Etching of Few‐Layer WS₂
  Shisheng Li; Yung‐Chang Lin; Yiling Chiew; Yunyun Dai; Zixuan Ning; Yaming Zhang; Hideaki Nakajima; Hong En Lim; Jing Wu; Yasuhisa Neitoh; Toshiya Okazaki; Yang Sun; Zhipei Sun; Kazu Suenaga; Yoshiki Sakuma; Kazuhito Tsukagoshi; Takaaki Taniguchi
  Advanced Functional Materials, Volume：34, Number：46, Oct. 2024, [Reviewed]
  Abstract
  
  Layer number‐dependent band structures and symmetry are vital for the electrical and optical characteristics of 2D transition metal dichalcogenides (TMDCs). Harvesting 2D TMDCs with tunable thickness and properties can be achieved through top‐down etching and bottom‐up growth strategies. In this study, a pioneering technique that utilizes the migration of in situ generated Na‐W‐S‐O droplets to etch out 1D nanotrenches in few‐layer WS₂ is reported. 1D WS₂ nanotrenches are successfully fabricated on the optically inert bilayer WS_2, showing pronounced photoluminescence and second harmonic generation signals. Additionally, the modulation of inkjet‐printed Na₂WO₄‐Na₂SO₄ particles to switch between the etching and growth modes by manipulating the sulfur supply is demonstrated. This versatile approach enables the creation of 1D nanochannels on 2D TMDCs. The research presents exciting prospects for the top‐down and bottom‐up fabrication of 1D‐2D mixed‐dimensional TMDC nanostructures, expanding their use for electronic and optoelectronic applications.
  Wiley, Scientific journal
  DOI：https://doi.org/10.1002/adfm.202405665
  DOI ID：10.1002/adfm.202405665, ISSN：1616-301X, eISSN：1616-3028

• Present, The Japan Society of Applied Physics
• Present, The Fullerenes, Nanotubes and Graphene Research Society

• ヘテロ固体界面における原子層物質の成長　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Apr. 2023 - Mar. 2026
  LIM HONGEN, Saitama University, Principal investigator
  Grant amount(Total)：4550000, Direct funding：3500000, Indirect funding：1050000
  Grant number：23K04530
• 原子細線による新奇1次元光電材料の創出　　　　　　　　　　　　　　　
  Murata Science Foundation, Jun. 2022 - May 2024
  Lim Hong En, Saitama University, Principal investigator
  Grant amount(Total)：5000000, Direct funding：5000000
• Controlled synthesis and understanding the growth mechanism of 1D transition metal chalcogenide aggregates　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Early-Career Scientists, Apr. 2021 - Mar. 2023
  LIM HONGEN, Principal investigator
  Grant amount(Total)：4680000, Direct funding：3600000, Indirect funding：1080000
  Controlling the morphology of the aggregates of one-dimensional van der Waals nanostructures is crucial to explore their physical properties and device applications. In this work, we focus on the growth of the ultrathin (only 3 atoms thick) transition metal chalcogenide atomic wires by using chemical vapor deposition. From the results obtained, we succeeded in (1) the growth of long, ribbon-like WTe aggregates and (2) the conversion of atomic wires into layered transition metal dichalcogenide nanoribbons via chalcogenization.
  Grant number：21K14498
• Fabrication and understanding the interface junction between atomic layers and 3D solids　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Early-Career Scientists, Apr. 2019 - Mar. 2021
  LIM HONGEN, Tokyo Metropolitan University
  Grant amount(Total)：4160000, Direct funding：3200000, Indirect funding：960000
  Studying the interface junction between van der Waals materials and bulk solids provides an important key towards possible control of their crystallographic structure, growth orientation and location. In this work, such junctions were fabricated using chemical vapor deposition. Based on the results obtained, we succeeded in (1) the growth of transition metal dichalcogenide atomic layers at the interface between dissimilar solids, and (2) the wafer-scale growth of transition metal chalcogenide atomic wires for the first time.
  Grant number：19K15393
• グラフェンナノリボンを原料としたカーボンナノチューブの構造選択的合成　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for JSPS Fellows, Apr. 2013 - Mar. 2015
  LIM HONGEN, Nagoya University, Principal investigator
  Grant amount(Total)：2400000, Direct funding：2400000
  Grant number：13J09322

• 導電膜及び導電部材　　　　　　　　　　　　　　　
  Patent right
  Patent/Registration no：特許第7570659号