Laser Irradiation Induced Structural Transformation in Layered Transition Metal Trichalcogenide Nanoflakes

Overview

Journal iScience

Publisher Cell Press

Date 2023 Sep 28

PMID 37766970

Authors

Huifeng Zhang

Xiong Tu

Ziyu Wu

Junqing Guo

Linfeng Fei

Xiaxia Liao

Jiaren Yuan

Siyuan Wan

Ya-Qing Bie

Yangbo Zhou

Affiliations

Soon will be listed here.

Abstract

Laser irradiation is a powerful tool in inducing changes in lattice structures and properties of two-dimensional (2D) materials through processes such as heating, bleaching, catalysis, etc. However, the underlying mechanisms of such transformations vary dramatically in different 2D materials. Here, we report the structural transformation of layered titanium trisulfide (TiS) to titanium disulfide (TiS) after irradiation. We systematically characterized the dependence of the transformation on laser power, flake thickness, irradiation time, and vacuum conditions using microscopic and spectroscopic methods. The underlying mechanism is confirmed as the heat-induced materials decomposition, a process that also occurs in many other transition metal trichalcogenide materials. Furthermore, we demonstrate that this spatial-resolved method also enables the creation of in-plane TiS-TiS heterostructures. Our study identifies a new family of 2D materials that undergo a structural transformation after laser irradiation and enriches the methods available for developing new prototypes of low-dimensional devices in the future.

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