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In Situ Detection of Local Structure Transformation of 2D SnSe Nanosheets through Nanothermomechanical Behavior
Author(s) -
Liu Zhibin,
Xu Kunqi,
Zeng Huarong,
Liu Zhifu,
Zhao Kunyu,
Zhang Faqiang,
Wang Dong,
Li Yongxiang
Publication year - 2021
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.202100121
Subject(s) - nanosheet , materials science , thermal stability , nanoscopic scale , nanotechnology , evaporation , thermal decomposition , tin , atomic force microscopy , chemical engineering , chemistry , metallurgy , thermodynamics , physics , organic chemistry , engineering
2D tin selenide (SnSe) is a promising semiconductive material and its thermal stability is one of the most significant evaluating indicators. However, few works are involved in the temperature‐dependent structure stability of 2D SnSe nanosheets. Herein, local structure transformation of a 2D SnSe nanosheet into SnSe 2 under high temperature is characterized by a novel atomic force microscope (AFM)‐based nanoscale thermomechanical method. Based on an AFM platform, the temperature‐dependent nanomechanical properties are investigated. A softness process is found to occur upon the surface of 2D SnSe, accompanying the structure transformation under high temperature. It means that the generation of SnSe 2 is due to the structure collapse of SnSe, stemming from the evaporation of Sn atoms under about 90 °C. The transformation mechanism is further verified by a real‐time nanothermomechanical method. A deeper understanding of the thermal stability and thermal decomposition mechanism of 2D SnSe is promoted. The improved in situ nanomechanical method offers a highly sensitive method to probing the nanomechanical properties of 2D materials.