KCl acts as a flux to assist the growth of sub-millimeter-scale metallic 2D non-layered molybdenum dioxide
Artikel i vetenskaplig tidskrift, 2024

Two-dimensional (2D) metal oxides (2DMOs), such as MoO2, 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 MoO2 flakes with so far the largest lateral size of up to sub-millimeter scale (~ 464 μm) were yielded. Electrical studies have revealed that the 2D MoO2 features metallic properties, with an excellent sheet resistance as low as 99 Ω·square−1 at room temperature, and exhibits a property of charge density wave in the measurement of resistivity as a function of temperature. Graphical abstract: TOC (Table of Content) (Figure presented.)

Flux method

Thickness modulation

Metallic

Metal oxide

2D non-layered materials

Författare

Liying Deng

Fuzhou University

Fujian Agriculture and Forestry University (FAFU)

Qing Zhang

Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

Tianjin University

Wangyang Li

Fuzhou University

Xiao Yuan Ye

Fuzhou University

Yi Fan Zhao

Shenzhen Institute of Advanced Technology

Shen Zhong Chen

Fuzhou University

Yu Lan Wang

Fuzhou University

Xinghui Wang

Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China

Fuzhou University

Hui Peng Chen

Fuzhou University

Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China

Zhi Yang Yu

Fuzhou University

Qun Yan

Fuzhou University

Ltd.

Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China

Shu Ying Cheng

Fuzhou University

Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China

Tailiang Guo

Fuzhou University

Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China

Wen Ping Hu

Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

Tianjin University

Feng Ding

Institute for Basic Science

Ulsan National Institute of Science and Technology (UNIST)

Jie Sun

Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China

Fuzhou University

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Rare Metals

1001-0521 (ISSN) 18677185 (eISSN)

Vol. In Press

Ämneskategorier

Materialkemi

Den kondenserade materiens fysik

DOI

10.1007/s12598-024-02898-0

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Senast uppdaterat

2024-08-23