KCl acts as a flux to assist the growth of sub-millimeter-scale metallic 2D non-layered molybdenum dioxide  

作　　者：Li-Ying Deng Qing Zhang Wang-Yang Li Xiao-Yuan Ye Yi-Fan Zhao Shen-Zhong Chen Yu-Lan Wang Xing-Hui Wang Hui-Peng Chen Zhi-Yang Yu Qun Yan Shu-Ying Cheng Tai-Liang Guo Wen-Ping Hu Feng Ding Jie Sun 

机构地区：[1]National and Local United Engineering Laboratory of Flat Panel Display Technology,College of Physics and Information Engineering,Fuzhou University,Fuzhou,350100,China [2]Fujian Key Laboratory of Agricultural Information Sensing Technology,College of Mechanical and Electrical Engineering,Fujian Agriculture and Forestry University,Fuzhou,350002,China [3]Key Laboratory of Organic Integrated Circuit,Department of Chemistry,School of Science,Ministry of Education and Tianjin Key Laboratory of Molecular Optoelectronic Sciences,Tianjin University,Tianjin,300072,China [4]Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin,300072,China [5]College of Physics and Information Engineering,Institute of Micro-Nano Devices and Solar Cells,Fuzhou University,Fuzhou,350108,China [6]State Key Laboratory of Photocatalysis on Energy and Environment,College of Chemistry,Fuzhou University,Fuzhou,350116,China [7]Faculty of Materials Science and Engineering/Institute of Technology for Carbon Neutrality,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen,518000,China

出　　处：《Rare Metals》2025年第1期404-416,共13页稀有金属(英文版)

基　　金：supported by the National Key Research and Development Program of China(Nos.2023YFB3608703 and 2023YFB3608700);Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(Nos.2021ZZ122 and 2020ZZ110);Fujian provincial projects(Nos.2021HZ0114 and 2021J01583).

摘　　要：Two-dimensional(2D)metal oxides(2DMOs),such as MoO_(2),have made impressive strides in recent years,and their applicability in a number of fields such as electronic devices,optoelectronic devices and lasers has been demonstrated.However,2DMOs present challenges in their synthesis using conventional methods due to their non-van der Waals nature.We report that KCl acts as a flux to prepare large-area 2DMOs with sub-millimeter scale.We systematically investigate the effects of temperature,homogeneous time and cooling rate on the products in the flux method,demonstrating that in this reaction a saturated homogenous solution is obtained upon the melting of the salt and precursor.Afterward,the cooling rate was adjusted to regulate the thickness of the target crystals,leading to the precipitation of 2D non-layered material from the supersaturated solution;by applying this method,the highly crystalline non-layered 2D MoO_(2)flakes with so far the largest lateral size of up to sub-millimeter scale(~464μm)were yielded.Electrical studies have revealed that the 2D MoO_(2)features metallic properties,with an excellent sheet resistance as low as 99Ω·square^(-1 )at room temperature,and exhibits a property of charge density wave in the measurement of resistivity as a function of temperature.

关 键 词：2D non-layered materials METALLIC Metal oxide Thickness modulation Flux method 

分 类 号：TG1[金属学及工艺—金属学]